{"id":36245,"date":"2024-10-28T07:44:05","date_gmt":"2024-10-28T07:44:05","guid":{"rendered":"https:\/\/www.fs-pcba.com\/?p=36245"},"modified":"2026-07-10T05:45:57","modified_gmt":"2026-07-10T05:45:57","slug":"gnd-in-circuit","status":"publish","type":"post","link":"https:\/\/www.fs-pcba.com\/ja\/gnd-in-circuit\/","title":{"rendered":"The Ultimate Guide to GND in a Circuit: Types, Design, Symbols and Best Practices"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"36245\" class=\"elementor elementor-36245\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-43eb8c2 elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"43eb8c2\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-abda257\" data-id=\"abda257\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3655ed2 elementor-widget__width-initial elementor-fixed elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"3655ed2\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;exclude_headings_by_selector&quot;:[],&quot;_position&quot;:&quot;fixed&quot;,&quot;headings_by_tags&quot;:[&quot;h2&quot;,&quot;h3&quot;],&quot;collapse_subitems&quot;:&quot;yes&quot;,&quot;no_headings_message&quot;:&quot;No headings were found on this page.&quot;,&quot;marker_view&quot;:&quot;numbers&quot;,&quot;minimize_box&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;tablet&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<div class=\"elementor-toc__header-title\">\n\t\t\t\tTable of Contents\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__3655ed2\" aria-expanded=\"true\" aria-label=\"Apri l&#039;indice dei contenuti\"><i aria-hidden=\"true\" class=\"fas fa-chevron-down\"><\/i><\/div>\n\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__3655ed2\" aria-expanded=\"true\" aria-label=\"Chiudi l&#039;indice dei contenuti\"><i aria-hidden=\"true\" class=\"fas fa-chevron-up\"><\/i><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"elementor-toc__3655ed2\" class=\"elementor-toc__body elementor-toc__list-items--collapsible\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<i class=\"elementor-toc__spinner eicon-animation-spin eicon-loading\" aria-hidden=\"true\"><\/i>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-2517caa\" data-id=\"2517caa\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-896c20b elementor-widget elementor-widget-spacer\" data-id=\"896c20b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9575d2f elementor-widget elementor-widget-heading\" data-id=\"9575d2f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">The Ultimate Guide to GND in a Circuit: Types, Design, Symbols and Best Practices<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e8a76fc elementor-widget elementor-widget-spacer\" data-id=\"e8a76fc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-38a9101 elementor-widget elementor-widget-image\" data-id=\"38a9101\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"768\" height=\"576\" src=\"https:\/\/www.fs-pcba.com\/wp-content\/uploads\/2024\/10\/What-is-GND-in-Circuit-768x576.jpg\" class=\"attachment-medium_large size-medium_large wp-image-42817\" alt=\"What is GND in Circuit\" srcset=\"https:\/\/www.fs-pcba.com\/wp-content\/uploads\/2024\/10\/What-is-GND-in-Circuit-768x576.jpg 768w, https:\/\/www.fs-pcba.com\/wp-content\/uploads\/2024\/10\/What-is-GND-in-Circuit-300x225.jpg 300w, https:\/\/www.fs-pcba.com\/wp-content\/uploads\/2024\/10\/What-is-GND-in-Circuit-16x12.jpg 16w, https:\/\/www.fs-pcba.com\/wp-content\/uploads\/2024\/10\/What-is-GND-in-Circuit.jpg 1000w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0477023 elementor-widget elementor-widget-heading\" data-id=\"0477023\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Introduction <\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9a01d39 elementor-widget elementor-widget-text-editor\" data-id=\"9a01d39\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>GND in a circuit represents a common point where the electric current returns to the source. In case that current does not return, GND can literally save lives. A pressing question among most electronics manufacturers is <strong>What is GND In-Circuit? <\/strong><\/p><div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-Ux2Ud1Gr5oGJhgxmgJEcvuyqnpd\">Ground, or \u201cGND\u201d in electronic design terminology, is considered an essential but rather misunderstood element in many electronic designs. Being referred to as \u201c<strong>the zero-volt connection<\/strong>\u201d in many definitions, Grounding covers far more than most designs understand. Inadequate grounding design can result in anything from stray noises and signal degradation to persistent electromagnetic interference (EMI) in an electronic design and even complete failure.<\/div><div class=\"ace-line ace-line old-record-id-GMIEdYw0RoiBfSxZ1cAcLvafnxg\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-P8vDdqRtNo0GHBxoj8KcBOsInDb\"><u><strong><a href=\"https:\/\/www.fs-pcba.com\/\" data-lark-is-custom=\"true\">FS Tech<\/a><\/strong><\/u> offers a thorough analysis of GND, moving beyond basic definitions in examining the role of GND as a hierarchical structure, clarify common misconceptions, and outline professional design and debugging practices in this blog.<\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9aade9b elementor-widget elementor-widget-heading\" data-id=\"9aade9b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What is GND In Circuit?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bf1793d elementor-widget elementor-widget-text-editor\" data-id=\"bf1793d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-NvI7d4oiuoEz54xa9thcHfSRnGb\">In electrical terms, GND means ground. No, not that ground that we stand on. This ground provides a reference point for all voltages on a PCB. Electric current flows through the circuit after receiving the signal from the load. The ground or GND provides a path for that current to return.<\/div><div class=\"ace-line ace-line old-record-id-KE9Fddq0so0OqSxhpGicLChbnBf\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-WiuVdfgzcouwYdxrPD6cHV1Sn2s\">When you turn on a TV, it sends a signal to request power from the source so it can operate. The current follows the path determined by the circuit, powers the TV, and returns to the source. You must be wondering <strong>what the GND does during this process<\/strong>.<\/div><div class=\"ace-line ace-line old-record-id-YQ0GdRO5hosSTHxH7nmcrCRRnMh\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-Mz1ZdO1zAoJtkGxlu2ScTbxHnec\">Here, GND is a wire made of copper, <u><a href=\"https:\/\/www.fs-pcba.com\/aluminum-clad-pcb\/\" data-lark-is-custom=\"true\">aluminum<\/a><\/u>, or steel. It does not carry current until there\u2019s a fault. When the current strays from its path, this wire safely discharges it into the earth, preventing potential damage and hazards. This is why it is normally called the ground wire.<\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f325cdf elementor-widget elementor-widget-image\" data-id=\"f325cdf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"502\" height=\"315\" src=\"https:\/\/www.fs-pcba.com\/wp-content\/uploads\/2024\/10\/GND-symbols.png\" class=\"attachment-large size-large wp-image-39288\" alt=\"GND symbols\" srcset=\"https:\/\/www.fs-pcba.com\/wp-content\/uploads\/2024\/10\/GND-symbols.png 502w, https:\/\/www.fs-pcba.com\/wp-content\/uploads\/2024\/10\/GND-symbols-300x188.png 300w, https:\/\/www.fs-pcba.com\/wp-content\/uploads\/2024\/10\/GND-symbols-18x12.png 18w\" sizes=\"(max-width: 502px) 100vw, 502px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-686ecff elementor-widget elementor-widget-heading\" data-id=\"686ecff\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Working Principle of GND In Circuit<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f404290 elementor-widget elementor-widget-text-editor\" data-id=\"f404290\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-Nk3zdN3dEoBO1ZxvpE4czvAQnHb\">The concept of GND (grounding) originated in the 19th century when humans realized that the earth could provide a return path for electric signals. German scientist Carl August von Steinheil first tried this on a telegraph, which was quite popular in that period. However, as time passed, several issues came to surface.<\/div><div class=\"ace-line ace-line old-record-id-X8oadqMAioA4AEx7H7Tci3RmnWf\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-ALWidCv0XoNUkWxh72Zc6iNbndb\"><strong>The GND connection is supposed to be low-resistance to guide the current back to the source.<\/strong> However, prolonged dry weather in that era reduced the ground\u2019s moisture. This increased GND\u2019s resistance and stopped the current from flowing back. Signals and communication suffered a lot on a regular basis.<\/div><div class=\"ace-line ace-line old-record-id-PXDVdodkNo6B9sxXF4Ocbv1Hnad\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-YRdwdYfSRo1LlzxxpSNcWWtjnOb\">Soon after, telephones began to replace telegraphs. Cities expanded and more electrical and telecommunication lines were installed. All the electromagnetic activity of humans created an ocean of unwanted currents within the earth. This ocean or induced currents produced noise that interfered with signals, and will probably keep on interfering for eternity.<\/div><div class=\"ace-line ace-line old-record-id-FLmKdwX65oUc3FxNkq7csERCn7e\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-DtPqdn2EaoRdoDxpHCzcINUunZc\">This is why GND is key in electronic systems. All components in a PCB behave the way they\u2019re supposed to because of it. Electric current starts and ends at the power source after flowing through all the components via GND. Without this ground connection, the circuit would be incomplete, and the electronic system would fail to operate.<\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2b515e0 elementor-widget elementor-widget-heading\" data-id=\"2b515e0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Why is GND in Circuit so Important?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9e2d3cb elementor-widget elementor-widget-text-editor\" data-id=\"9e2d3cb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-XnM1d5mIzoOwxlxn7XEcPQDMnzb\">GND is the reason for the circuit\u2019s functionality, stability, and safety. In case of a fault or sudden surge, it protects equipment and users from potential hazards by discharging the current into the ground.<\/div><div>\u00a0<\/div><div class=\"ace-line ace-line old-record-id-PQ0UdwbZ8oKDaFxuMKuclM8Bnmf\">Grounding is critical in PCBs, power systems, and telecommunication equipment. It provides an opportunity to create safe and reliable electronic systems, using earth, chassis, signal, or any other viable grounds.<\/div><div>\u00a0<\/div><div class=\"ace-line ace-line old-record-id-Db85d8iWJoPYAhxsuO5cxe6Gnce\">The following is where GND serves two indispensable functions in any electronic system:<\/div><div>\u00a0<\/div><ol class=\"list-number1\" start=\"1\"><li class=\"ace-line ace-line old-record-id-AKbudOmSbo433TxC37Wcz6qNnnh\" data-list=\"number\"><div><strong>Voltage Reference Point:<\/strong> Voltages refer to a potential difference, and all measurements are taken from a reference point. The ground plane or net is usually identified as the reference point at 0 V. Voltages of +3.3 V are then referenced from the ground plane or GND.<\/div><\/li><li class=\"ace-line ace-line old-record-id-J8iad8IK6oYQVCxv4XZcaSTznoe\" data-list=\"number\"><div><strong>Current Return Path:<\/strong> All outgoing current must return to its source in accordance with the current continuity path principle. The main current return path from both signal and power current is through the GND. An important professional design consideration is that current return path needs to have <u><a href=\"https:\/\/www.fs-pcba.com\/impedance-control\/\" data-lark-is-custom=\"true\">low impedance<\/a><\/u> and good control because it affects signal integrity and EMC performance.<\/div><\/li><\/ol><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4b4c6bd elementor-widget elementor-widget-heading\" data-id=\"4b4c6bd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Types of GND In Circuit<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b9fa4e0 elementor-widget elementor-widget-text-editor\" data-id=\"b9fa4e0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Several types of GND are used for various applications. The most common ones are Earth, Chassis, and Signal Grounds, but we will look at more of them.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f3616db elementor-widget elementor-widget-heading\" data-id=\"f3616db\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Earth Ground (EGND)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a69e432 elementor-widget elementor-widget-text-editor\" data-id=\"a69e432\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-FavRdziX1om6CBxRypscOLtPnHe\"><strong>EGND<\/strong> is the most widely used type of grounding in today\u2019s electrical systems. It involves connecting the systems to real ground using grounding electrodes such as metal rods, plates, and rings. They consist of highly conductive materials like <u><a href=\"https:\/\/www.fs-pcba.com\/copper-based-pcb\/\" data-lark-is-custom=\"true\">copper<\/a><\/u>, galvanized steel, stainless steel, and copper-clad steel.<\/div><div class=\"ace-line ace-line old-record-id-LtyRdPa5hoGtDuxTthJc3g79nth\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-Cg43dK1fTomYBvxWE1Ncr2jbnHQ\">The grounding electrodes are buried underground near the structure\u2019s electrical panel. GND is connected to them through a grounding conductor, which is attached to the ground bus within the same panel.<\/div><div class=\"ace-line ace-line old-record-id-J3cYdgOmPohvu8xMlMccyD6Lnld\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-RYcrduWjYovefLxtF5ucr426n1f\">Almost all urban structures including homes, offices, and factories, have EGND. It protects these buildings from shocks and fires by providing a safe route for fault currents to discharge into the ground.<\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-07fbd95 elementor-widget elementor-widget-heading\" data-id=\"07fbd95\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Chassis Ground<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8ea0fb0 elementor-widget elementor-widget-text-editor\" data-id=\"8ea0fb0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-IOcUdP6W3olOCDx3EelcaC6ZnVd\">Connecting to EGND is not always possible in certain applications. For example, you can\u2019t keep portable electronic devices and <u><a href=\"https:\/\/www.fs-pcba.com\/automotive-pcb\/\" data-lark-is-custom=\"true\">automobiles<\/a><\/u> connected to the ground all the time. You only connect them to the ground when they are running out of power\/<u><a href=\"https:\/\/www.fs-pcba.com\/battery-eliminator-circuit\/\" data-lark-is-custom=\"true\">battery<\/a><\/u>.<\/div><div class=\"ace-line ace-line old-record-id-C7Dodq14fo8WtBx3iokcve0Znhd\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-SmsqdjMkqozGmZxFWlicNiM1nwd\">In such cases, a ground plane is used as the common reference point. A ground plane on a PCB or GND PCB is a large copper layer on the board. It acts as a reference for all the electricity flowing across the board. It means that the metal structure of the device itself (car, mobile phone, or laptop) becomes the GND.<\/div><div class=\"ace-line ace-line old-record-id-HMVkdOAFMoDHNextyi4cLeL5n94\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-SOUkdiXOVo9rx8xfiXIcV8yVnve\">The <strong>chassis ground<\/strong> protects the system from electromagnetic interference (EMI), which affects your device\u2019s operations. While not directly connected to the ground, it still keeps excess current away from the device\u2019s components and humans.<\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-406155c elementor-widget elementor-widget-heading\" data-id=\"406155c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Signal Ground (SGND)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d3af0ad elementor-widget elementor-widget-text-editor\" data-id=\"d3af0ad\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-SZGdddS8IoHmqgxzIpscWLganJ9\"><strong>SNGD<\/strong> provides a reference point for signals traveling between devices. Since each device has its power source, their voltages can vary a little. This minor difference produces small currents that generate noise and distort the signals. SNGD separates the signal path from these noisy currents.<\/div><div class=\"ace-line ace-line old-record-id-XRELdxx48oYZRixcnKtcvkFRnZg\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-PJu0dxdnKoQx5NxczfgcwF2hnzd\">You can use signal ground in pcb which heavily depends on signal processing. For example, PCBs in sound systems need SGND to stop electrical signals from interfering with the audio signals. Signal ground isolates the noise so you can hear clear sound.<\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c5776b0 elementor-widget elementor-widget-heading\" data-id=\"c5776b0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Analog Ground (AGND)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-036ce37 elementor-widget elementor-widget-text-editor\" data-id=\"036ce37\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-JohAd5LSFotZ2xxx5A1ct9MrnLd\">Electronics have two types of signals; analog and digital. Analog signals are slow and continuous, whereas, digital signals are quick bursts of electricity. When fast digital signals collide with analog, the quality of analog signals suffers.<\/div><div class=\"ace-line ace-line old-record-id-FdZ7d9PtroLIJoxxyaYcApk5n0g\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-MmzXdUN5soR5M6xhEjacVN3mnye\">It requires a proper circuit board ground to split the paths of analog and digital signals. You can create <strong>AGND<\/strong> by specifying a point on an analog circuit to serve as a reference. It prevents digital noise from interfering with analog signals.<\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-87bf1e6 elementor-widget elementor-widget-heading\" data-id=\"87bf1e6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Digital Ground (DGND)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e408874 elementor-widget elementor-widget-text-editor\" data-id=\"e408874\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-VfNSdB7aPolQBkxAiLfcmyDHnNb\"><strong>Digital Ground(DGND)<\/strong> is a reference for high-speed digital signals and manages the noise created by their quick switching. It keeps them separate from disrupting analog signals, so systems with mixed-signal <u><a href=\"https:\/\/www.fs-pcba.com\/what-is-an-integrated-circuit-and-its-types\/\" data-lark-is-custom=\"true\">integrated circuits (ICs)<\/a><\/u> can run smoothly.<\/div><div class=\"ace-line ace-line old-record-id-DWwbdzSO3oLlx2x5ZE0c6QNznCb\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-X3ledJrWaobzq4x3WPmcdaH0n1g\">Analog components like ADCs (Analogue-to-Digital Converters) and DACs (Digital-to-Analog Converters) provide an interface between analog signals and digital processes. For example, many <u><a href=\"https:\/\/www.fs-pcba.com\/medical-pcb\/\" data-lark-is-custom=\"true\">medical devices<\/a><\/u> monitor analog signals like heartbeat and convert them to digital data for diagnosis.<\/div><div class=\"ace-line ace-line old-record-id-OIzsdFSJFoT1GJxxC8OcX4pMnLh\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-AzUXdYN1WoeWGLxNv2HcYe2Bnih\">Digital noise can couple into these sensitive analog signals and cause inaccurate readings. That\u2019s why it needs to be grounded with DGND.<\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-de715ec elementor-widget elementor-widget-heading\" data-id=\"de715ec\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Power Ground (PGND)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-99b8837 elementor-widget elementor-widget-text-editor\" data-id=\"99b8837\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-K6RudNAzpoFkefxPXBXcv582nrg\"><strong>PGND<\/strong> is a ground point for power supply circuits and high-current components of the PCB. This type of ground isolates the noise from power circuits that interrupt analog signals. It is similar to EGND as it also opens a path for currents in case of electrical faults. It connects various power supply voltages in a way that all components share one reference point.<\/div><div class=\"ace-line ace-line old-record-id-UEyLdooYFoslcpxU1wscpxDSnxf\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-FF6hdM1OkokBejxIeHpclvu2nfd\">You can also create PGND by connecting conductors to grounding electrodes. It protects equipment and humans from electric shocks by safely dissipating the excess current into the ground. If implemented correctly, PGND can regulate irregular voltage fluctuations.<\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-312d0eb elementor-widget elementor-widget-heading\" data-id=\"312d0eb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">AC Ground (CGND)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-26dfe61 elementor-widget elementor-widget-text-editor\" data-id=\"26dfe61\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-DXBWdPXrWoBFC9x9kN1cmdpCnNh\"><strong>CGND<\/strong> is a reference point for alternate current (AC) in <u><a href=\"https:\/\/www.fs-pcba.com\/how-power-supplies-work\/\" data-lark-is-custom=\"true\">AC-DC power supply<\/a><\/u> circuits. It is typically connected to DC Ground using inductors (L) or coupling capacitors (C). It helps AC to pass by blocking DC signals.<\/div><div class=\"ace-line ace-line old-record-id-E3PLdR6PgoWUQ1xNeHuc6saDnKe\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-BapadOsOnopiXux5ukRcZp4qngc\">C are high-pass filters with low resistance to AC frequencies and high resistance to DC. When placed between two circuit nodes, they isolate the DC part and allow only AC to be transmitted.<\/div><div class=\"ace-line ace-line old-record-id-EQc2dkltkoI3CcxU28TcBAL0n2d\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-K1iHdZaeeoMdJlxLsY6coCion5g\">Many engineers place C close to the signal source to minimize the chances of signals dropping. C can also be used together with L to form LC filters. This doubles the ability of the ground to filter certain frequencies and allow others to pass.<\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-41f9c4a elementor-widget elementor-widget-heading\" data-id=\"41f9c4a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Star Ground<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7606b3d elementor-widget elementor-widget-text-editor\" data-id=\"7606b3d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-PXa5dKuYDobdoAxFEl1c556EnFe\">This type of grounding connects multiple GNDs to a single point in the shape of a star. This design prevents <u><a href=\"https:\/\/www.fs-pcba.com\/identify-pcb-components\/\" data-lark-is-custom=\"true\">PCB components<\/a><\/u> from interfering with each other. EMI can cause crosstalk in ICs when multiple high-frequency conductors are placed close to each other.<\/div><div class=\"ace-line ace-line old-record-id-QfsndREnZoPvOvxX9zDc9Qqqn2b\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-RtqndkD8ho0mT1xYXrocsHqKnrb\">It is like common ground PCB. All components share a single GND to prevent interference between different parts of the circuit so the voltages don\u2019t fluctuate.<\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9abd8e3 elementor-widget elementor-widget-heading\" data-id=\"9abd8e3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Floating Ground<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-31a2bb8 elementor-widget elementor-widget-text-editor\" data-id=\"31a2bb8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-KCf5dTaNVol8qmxfglkcU9znnEh\">It is a reference point for all voltages in a circuit isolated from the actual earth. Most electronics have GND in a PCB, meaning they are connected to the ground. However, when this connection to Earth is not implemented, the ground is said to be \u201cfloating\u201d.<\/div><div class=\"ace-line ace-line old-record-id-SsXWdEw9loJ0zcxyLt9cZtR4nbF\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-XdkodlITtol9wVxG7KmciMRnnue\">In many applications, connecting your devices to Earth can cause serious hazards. The ground can carry high voltages due to faults in the load or natural disasters. These circumstances can create surges in the load, risking damage to the equipment or humans.<\/div><div class=\"ace-line ace-line old-record-id-TmUndhXBFo0bwNxDt6RceKM7nWg\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-Kliodovp0oc2ccxO0orcXSlrn2g\">By isolating GND, circuits can operate independently to save sensitive equipment. Floating Ground is often described as a means to accurately measure load current. This is not a type of GND but just a condition to apply when GND is a problem.<\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cf64030 elementor-widget elementor-widget-heading\" data-id=\"cf64030\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Critical Conceptual Clarifications of GND in Circuit<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b701c67 elementor-widget elementor-widget-text-editor\" data-id=\"b701c67\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><h3 class=\"heading-3 ace-line old-record-id-FxZjdHitAoLOiFx2ic3cAoaWn6F\">GND vs. AGND (Analog Ground)<\/h3><ul class=\"list-bullet1\"><li class=\"ace-line ace-line old-record-id-OEV7dhwdEo2sFLx4esLcWFODn3f\" data-list=\"bullet\"><div><strong>Relation:<\/strong> AGND stands for a particular subset of the total GND system. In schematics, &#8220;GND&#8221; symbolizes the generic term, whereas &#8220;AGND&#8221; represents the isolated area earmarked for analog devices in the mixed-signal PCB layout.<\/div><\/li><li class=\"ace-line ace-line old-record-id-JnVrdbMlqor3NdxsLAAc6Feunv5\" data-list=\"bullet\"><div><strong>Distinction:<\/strong> The general ground network can introduce noise, while AGND is designed to behave noiselessly. The manner in which these grounds are coupled together, frequently through a single point of connection or star point, represents an important design trade-off in eliminating ground noise issues in analog circuits.<\/div><\/li><\/ul><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4ccee7c elementor-widget elementor-widget-text-editor\" data-id=\"4ccee7c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><h3 class=\"heading-3 ace-line old-record-id-QXzAdbUM1o16cpxapRJcGgwPn9e\">GND (Circuit Ground) vs. Earth Ground<\/h3><ul class=\"list-bullet1\"><li class=\"ace-line ace-line old-record-id-IVWWdJQELoEH73xh6OUcUegfntd\" data-list=\"bullet\"><div><strong>Key Difference:<\/strong> Circuit GND is an electrical reference point, a local &#8220;0V&#8221; that can be floating. Grounding can refer to the connection of electrical devices to the earth in terms of safety aspects.<\/div><\/li><li class=\"ace-line ace-line old-record-id-HCGbdOxZYoZrzrxLddAcPEDPn0e\" data-list=\"bullet\"><div><strong>Functional Difference:<\/strong> It works using the internal GND of the circuit. In most circuits, when current flows, it does not go through the Earth. The chassis of the circuit is attached to the Earth for safety.<\/div><\/li><\/ul><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-eae46b9 elementor-widget elementor-widget-text-editor\" data-id=\"eae46b9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><h3 class=\"heading-3 ace-line old-record-id-X6gfdcABGobaDgxAHdzcNkyKnNe\">GND vs. Power Supply Negative (-) Terminal<\/h3><ul class=\"list-bullet1\"><li class=\"ace-line ace-line old-record-id-Xi2ddN2s9or3z4xOYjGcPULkn4d\" data-list=\"bullet\"><div><strong>Role Definition:<\/strong> GND represents the reference plane of the system, while the Power Supply Negative represents an Energy return port.<\/div><\/li><li class=\"ace-line ace-line old-record-id-TmDjdRcodoTzdTxIVzrckZxAnHc\" data-list=\"bullet\"><div><strong>Practical Application:<\/strong><\/div><ul class=\"list-bullet2\"><li class=\"ace-line ace-line old-record-id-FiJIdpm5yoeUaUx6i5WccG2inbd\" data-list=\"bullet\"><div>In single supply circuits, such as +5 V supplies, the negative lead is usually considered the system ground; essentially, they are the same.<\/div><\/li><li class=\"ace-line ace-line old-record-id-DouJdFFxpohmIHx9fbNcNmtdn2g\" data-list=\"bullet\"><div>In a dual-supply or bipolar supply system (for example, \u00b112 V), the ground (GND) is fixed at the midpoint between the two supplies. It is not the same as V- or V+ terminals.<\/div><\/li><\/ul><\/li><\/ul><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b12cae2 elementor-widget elementor-widget-text-editor\" data-id=\"b12cae2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><h3 class=\"heading-3 ace-line old-record-id-EuvQd26yiotDoaxjFsfc30Nwngf\">Is GND Positive or Negative?<\/h3><ul class=\"list-bullet1\"><li class=\"ace-line ace-line old-record-id-QyKcd14ivo8UflxDw9ZcPfLbnVf\" data-list=\"bullet\"><div><strong>Core Principle:<\/strong> The polarity of GND is relative because it depends upon its role in the system.<\/div><\/li><li class=\"ace-line ace-line old-record-id-E395dvZSWoOxYlxhv1CcgkHdnKh\" data-list=\"bullet\"><div><strong>Analysis:<\/strong><\/div><ul class=\"list-bullet2\"><li class=\"ace-line ace-line old-record-id-RcJKdDvcXoCl8RxVMoGcoz4InEe\" data-list=\"bullet\"><div>In a positive-supply-only system, GND denotes the most negative point and the lowest potential.<\/div><\/li><li class=\"ace-line ace-line old-record-id-KLgodEITAogy8jxgwCDcv0gDnZy\" data-list=\"bullet\"><div>In a negative-supply-only system, GND symbolizes the maximum potential or the most positive point.<\/div><\/li><li class=\"ace-line ace-line old-record-id-YGQFdjodNoEBX6x9v8yc3DkOneb\" data-list=\"bullet\"><div>In a bipolar supply system, GND is the reference between the two.<\/div><\/li><\/ul><\/li><li class=\"ace-line ace-line old-record-id-GkiDd0bkzoGnk0xjgKBcWP9Bn4C\" data-list=\"bullet\"><div><strong>Conclusion:<\/strong> GND itself is neither positive nor negative; it is referenced as the 0-volt reference point, and all other points in the circuit are labeled as positive or negative <em>relative to GND<\/em>.<\/div><\/li><\/ul><\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-43220e9 elementor-widget elementor-widget-image\" data-id=\"43220e9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"531\" src=\"https:\/\/www.fs-pcba.com\/wp-content\/uploads\/2024\/10\/GND-in-a-PCB.png\" class=\"attachment-large size-large wp-image-36258\" alt=\"GND in circuit\" srcset=\"https:\/\/www.fs-pcba.com\/wp-content\/uploads\/2024\/10\/GND-in-a-PCB.png 1000w, https:\/\/www.fs-pcba.com\/wp-content\/uploads\/2024\/10\/GND-in-a-PCB-300x199.png 300w, https:\/\/www.fs-pcba.com\/wp-content\/uploads\/2024\/10\/GND-in-a-PCB-768x510.png 768w, https:\/\/www.fs-pcba.com\/wp-content\/uploads\/2024\/10\/GND-in-a-PCB-18x12.png 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-861c7c1 elementor-widget elementor-widget-heading\" data-id=\"861c7c1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Professional GND Implementation in PCB Design<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5a9ccfa elementor-widget elementor-widget-text-editor\" data-id=\"5a9ccfa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><h3 class=\"heading-3 ace-line old-record-id-KWbrdjhfZoezLvxynZncqor7n7g\">Grounding Methodologies<\/h3><ul class=\"list-bullet1\"><li class=\"ace-line ace-line old-record-id-GKE2darXWoda0IxayaDceYjBnWf\" data-list=\"bullet\"><div><strong>Single-Point Grounding:<\/strong> Used in low-frequency analog designs (&lt; 1MHz). It eliminates ground loops and common-impedance noise by grounding all ground points at a single point.<\/div><\/li><li class=\"ace-line ace-line old-record-id-AwHddyGjWomMqexOMX8cEIX9nuh\" data-list=\"bullet\"><div><strong>Multi-Point Grounding &amp; Ground Planes:<\/strong> These are necessary in high-frequency digital and RF designs above 10 MHz. Ground planes offer the lowest possible impedance return path, reduce the area of loops, and offer shielding in addition; these are the standards of today\u2019s <u><a href=\"https:\/\/www.fs-pcba.com\/tips-for-high-speed-pcb-design\/\" data-lark-is-custom=\"true\">high-speed designs<\/a><\/u>.<\/div><\/li><li class=\"ace-line ace-line old-record-id-HRvsdJdv8og4KIxsuincRhSznjg\" data-list=\"bullet\"><div><strong>Hybrid Grounding:<\/strong> Used in mixed-signal circuits, where analog ground (AGND) and digital ground (DGND) are interconnected at a single point. It ensures that there is no noise coupling, but at the same time, it maintains the high-frequency return path.<\/div><\/li><\/ul><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b02005d elementor-widget elementor-widget-text-editor\" data-id=\"b02005d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><h3 class=\"heading-3 ace-line old-record-id-NOMQdJYjdoHIDaxQ1e6cgxMOnPg\">Core Design Principles<\/h3><ul class=\"list-bullet1\"><li class=\"ace-line ace-line old-record-id-ADF4dvhdXo8ZllxyRPGcpgDDnZc\" data-list=\"bullet\"><div><strong>Keep Low Impedance:<\/strong> Solid ground planes are preferred whenever possible; wide <u><a href=\"https:\/\/www.fs-pcba.com\/pcb-trace\/\" data-lark-is-custom=\"true\">traces<\/a><\/u> can be employed for power grounds.<\/div><\/li><li class=\"ace-line ace-line old-record-id-FZAidfrw1or6dlxyqSycvsTCnB3\" data-list=\"bullet\"><div><strong>Control Return Currents:<\/strong> Think about the return path of the high-speed signals, usually under the signal trace. Don&#8217;t cut or moat through the return path.<\/div><\/li><li class=\"ace-line ace-line old-record-id-SgsFdyEjNoCGfvxK9qgcfcyMnTg\" data-list=\"bullet\"><div><strong>Manage Currents:<\/strong> Keep high-noise power return current paths away from low-noise signal return current paths, and layout the PCB so that there are no shared ground paths.<\/div><\/li><\/ul><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-847f887 elementor-widget elementor-widget-heading\" data-id=\"847f887\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Mechanisms of Common GND-Related Problems<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2061982 elementor-widget elementor-widget-text-editor\" data-id=\"2061982\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><ul class=\"list-bullet1\"><li class=\"ace-line ace-line old-record-id-GEcidQylJobO0GxoyIJcZ0zsnFu\" data-list=\"bullet\"><div><strong>Common-Impedance Coupling:<\/strong>It happens when both circuits share the same ground trace segment. Noise current from the &#8220;noisy&#8221; circuit (e.g., a digital IC) causes a corresponding voltage drop in the shared impedance, which manifests as an error signal in the &#8220;quiet&#8221; circuit (e.g., a sensor).<\/div><\/li><li class=\"ace-line ace-line old-record-id-PtULdnHSEoC0vix0ohhcRIE1n4b\" data-list=\"bullet\"><div><strong>Ground Bounce:<\/strong> In digital VLSI circuits, the inductance due to package leads or bonds can cause ground bounce when many outputs change at the same time (e.g., a data bus), resulting in logical errors and increased EMI.<\/div><\/li><li class=\"ace-line ace-line old-record-id-Mc7edaaRsoecakxK8SPcRq5anFc\" data-list=\"bullet\"><div><strong>Ground Loops:<\/strong> Form when a system is grounded at multiple points, creating a large loop area. Alternating magnetic fields can induce circulating currents in this loop, which manifest as hum (50\/60 Hz) or other noise in sensitive analog signals.<\/div><\/li><\/ul><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dda5910 elementor-widget elementor-widget-heading\" data-id=\"dda5910\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">How to Troubleshoot GND Issues<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c1f1533 elementor-widget elementor-widget-text-editor\" data-id=\"c1f1533\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-HZftd0iVxotitExGBOdcY68Hn8c\">There can be several issues with GND, like poor connection, or ground loops. One way to fix these problems is to check grounding conductors for signs of damage. If they are not maintained or repaired timely, they won\u2019t be able to make a proper GND connection.<\/div><div class=\"ace-line ace-line old-record-id-KVRud0bn1oARw8xtJZfc38KlnNf\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-Gt3rdKJwJoeFvLxgpULctUmyngf\">Next, check if all bonds (bonding connections) throughout the PCB and other circuits are reinforced or replaced (if broken). Regularly test <strong>ground fault circuit interrupters (GFCIs)<\/strong> to check if they\u2019re automatically disconnecting power whenever there\u2019s a fault. These practices can prevent serious damage to man and machine.<\/div><div class=\"ace-line ace-line old-record-id-EtwJdVWD7osJvSxlC4XcfgQqnWh\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-KcKjdhbTIosDoVx7qUxckJpVnyh\">There are several techniques to measure and trace the exact spot of the issue in GND. You can use a resistance meter, a circuit tracer, or an ohmmeter. Resistance meter is to check the resistance from the positive to negative points. <strong>A safe value would be somewhere between 0.5 to 2 ohms.<\/strong><\/div><div class=\"ace-line ace-line old-record-id-ItAPdtXHsofiAhxvKBFcav49nih\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-F3GVdkluUoOdBExciMQcAkzPnJf\">You can also detect issues along the GND path with a circuit tracer by sending signals through the circuit and then receiving them. An ohmmeter can help you pinpoint the exact circuit that\u2019s causing a problem.<\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6525ea3 elementor-widget elementor-widget-heading\" data-id=\"6525ea3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Conclusion<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6716b69 elementor-widget elementor-widget-text-editor\" data-id=\"6716b69\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-AdXbdoNWHodrhdxoeQIcRSKsnQd\">The knowledge of electronic design involves understanding the hierarchical nature of GND, distinguishing between its conceptual representations, and practicing the low-impedance, controlled-return current path on a PCB. It can all begin by stepping away from the simplistic definition of GND as simply 0 V and recognizing its existence as a basic reference and return ground. With such understanding, effective high-performance, compliant, and robust electronic designs can be developed.<\/div><div class=\"ace-line ace-line old-record-id-BYzKddpoSoAlpSxw5Y5c59v7n4f\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-V3LcdvwvCo78U6xnKbGcBPVxnKb\"><strong>We provide cost-effective <u><a href=\"https:\/\/www.fs-pcba.com\/pcb-assembly\/\" data-lark-is-custom=\"true\">PCB assembly services<\/a><\/u> according to your business needs. <u><a href=\"https:\/\/www.fs-pcba.com\/contact\/\" data-lark-is-custom=\"true\">Partner with us now<\/a><\/u> to achieve your project goals.<\/strong><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-37e3c6b elementor-widget elementor-widget-heading\" data-id=\"37e3c6b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">FAQs about GND in Circuit<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-61308b4 elementor-widget elementor-widget-accordion\" data-id=\"61308b4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"accordion.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-accordion\">\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1011\" class=\"elementor-tab-title\" data-tab=\"1\" role=\"button\" aria-controls=\"elementor-tab-content-1011\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Is GND the same as the negative terminal of a battery?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1011\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"1\" role=\"region\" aria-labelledby=\"elementor-tab-title-1011\"><div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\" old-record-id-XjFPd30J7o6PJJxsH9Qcd8ednCf\">In a single-supply system, yes, the negative terminal is typically defined as the system GND. However, in systems with bipolar supplies (e.g., \u00b112V), GND is an independent reference point between the positive and negative rails.<\/div><\/div><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1012\" class=\"elementor-tab-title\" data-tab=\"2\" role=\"button\" aria-controls=\"elementor-tab-content-1012\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Why do we separate AGND and DGND?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1012\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"2\" role=\"region\" aria-labelledby=\"elementor-tab-title-1012\"><div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\" old-record-id-JRNMdQDaZoUWOmx45TJcqitPnCb\">We separate them to prevent the high-frequency, noisy currents from the digital circuitry from flowing through the same copper as the analog ground, which would corrupt the sensitive analog reference voltage and degrade performance.<\/div><\/div><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1013\" class=\"elementor-tab-title\" data-tab=\"3\" role=\"button\" aria-controls=\"elementor-tab-content-1013\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">If my PCB has a ground plane, do I still need to worry about ground loops?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1013\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"3\" role=\"region\" aria-labelledby=\"elementor-tab-title-1013\"><div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\" old-record-id-UlWdd7eoMoxWIFxmcSsc4k4znTR\">A solid ground plane minimizes the impedance of return paths, which helps. However, ground loops can still form at a larger system level\u2014for example, when two grounded devices are connected by a cable. The resulting large loop area can still pick up interference.<\/div><\/div><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1014\" class=\"elementor-tab-title\" data-tab=\"4\" role=\"button\" aria-controls=\"elementor-tab-content-1014\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">My circuit works on a bench supply but not when powered by a wall adapter. What's a likely cause?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1014\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"4\" role=\"region\" aria-labelledby=\"elementor-tab-title-1014\"><div data-page-id=\"R3eSd72BMomgFBxDU88cWqgwnFg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\" old-record-id-C2TtdWJBVoU9G7xRjGGcQyjAnKc\">This often points to a missing or poor Earth ground connection. The bench supply may be floating, while the wall adapter connects to Earth. This change can create ground loops or alter the common-mode operating point of your circuit. Always ensure your chassis is properly connected to Earth.<\/div><\/div><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<aside class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-8edb067\" data-id=\"8edb067\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-767ef1f elementor-widget elementor-widget-spacer\" data-id=\"767ef1f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-95a5bcd elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"95a5bcd\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-e7b6fe0\" data-id=\"e7b6fe0\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-cf56e97 elementor-widget elementor-widget-heading\" data-id=\"cf56e97\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<span class=\"elementor-heading-title elementor-size-large\">Service<\/span>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-2f32820 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2f32820\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-281d4b9\" data-id=\"281d4b9\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7f77ad7 elementor-align-start active elementor-icon-list--layout-traditional elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"7f77ad7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.fs-pcba.com\/ic-programming-service\/\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-chevron-right\"><\/i>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">IC Programming<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.fs-pcba.com\/procurement-service\/\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-chevron-right\"><\/i>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Component Procurement<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.fs-pcba.com\/pcb-manufacturing-services\/\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-chevron-right\"><\/i>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">PCB Manufacturing<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.fs-pcba.com\/pcb-assembly\/\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-chevron-right\"><\/i>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">PCB Assembly<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.fs-pcba.com\/pcba-prototyping\/\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-chevron-right\"><\/i>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">PCBA Prototype<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.fs-pcba.com\/cable-and-wire-harness-assembly\/\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-chevron-right\"><\/i>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Harness Assembly<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.fs-pcba.com\/box-build-assembly\/\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-chevron-right\"><\/i>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Box Build Assembly<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.fs-pcba.com\/pcb-test\/\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-chevron-right\"><\/i>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">PCB Test<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-55d1860 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"55d1860\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-852b095\" data-id=\"852b095\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-d2f3ae0 elementor-widget elementor-widget-heading\" data-id=\"d2f3ae0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<span class=\"elementor-heading-title elementor-size-large\">Quote<\/span>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-b94227d elementor-button-align-stretch elementor-widget elementor-widget-form\" data-id=\"b94227d\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;step_next_label&quot;:&quot;Next&quot;,&quot;step_previous_label&quot;:&quot;Previous&quot;,&quot;button_width&quot;:&quot;100&quot;,&quot;step_type&quot;:&quot;number_text&quot;,&quot;step_icon_shape&quot;:&quot;circle&quot;}\" data-widget_type=\"form.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<form class=\"elementor-form\" method=\"post\" name=\"New Form\" aria-label=\"New Form\">\n\t\t\t<input type=\"hidden\" name=\"post_id\" value=\"36245\"\/>\n\t\t\t<input type=\"hidden\" name=\"form_id\" value=\"b94227d\"\/>\n\t\t\t<input type=\"hidden\" name=\"referer_title\" value=\"\" \/>\n\n\t\t\t\n\t\t\t<div class=\"elementor-form-fields-wrapper elementor-labels-above\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-text elementor-field-group elementor-column elementor-field-group-name elementor-col-100\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-name\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tName\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"text\" name=\"form_fields[name]\" id=\"form-field-name\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"Name\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-email elementor-field-group elementor-column elementor-field-group-email elementor-col-100 elementor-field-required\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-email\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tEmail\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"email\" name=\"form_fields[email]\" id=\"form-field-email\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"Email\" required=\"required\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-tel elementor-field-group elementor-column elementor-field-group-field_19f75cd elementor-col-100\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-field_19f75cd\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tPhone\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t<input size=\"1\" type=\"tel\" name=\"form_fields[field_19f75cd]\" id=\"form-field-field_19f75cd\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"Phone\" pattern=\"[0-9()#&amp;+*-=.]+\" title=\"Sono accettati solo numeri e caratteri telefonici (#, -, *, ecc.).\">\n\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-textarea elementor-field-group elementor-column elementor-field-group-message elementor-col-100\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-message\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tMessage\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t<textarea class=\"elementor-field-textual elementor-field  elementor-size-sm\" name=\"form_fields[message]\" id=\"form-field-message\" rows=\"4\" placeholder=\"Message\"><\/textarea>\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-upload elementor-field-group elementor-column elementor-field-group-field_9dadb5c elementor-col-100\">\n\t\t\t\t\t\t\t<input type=\"file\" name=\"form_fields[field_9dadb5c]\" id=\"form-field-field_9dadb5c\" class=\"elementor-field elementor-size-sm  elementor-upload-field\">\n\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-group elementor-column elementor-field-type-submit elementor-col-100 e-form__buttons\">\n\t\t\t\t\t<button class=\"elementor-button elementor-size-sm\" type=\"submit\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Send<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/button>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/form>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/aside>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-25201443 elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"25201443\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-494e3d7\" data-id=\"494e3d7\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-66f0b8a8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"66f0b8a8\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column 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tag-pcb-assembly tag-pcb-assembly-blog\" role=\"listitem\">\n\t\t\t<div class=\"elementor-post__card\">\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<span class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/www.fs-pcba.com\/ja\/security-camera-pcba-day-night-switching-ir-led-driver\/\" >\n\t\t\t\tSecurity Camera PCBA Design Guide: Day\/Night Switching and Infrared LED Driver\t\t\t<\/a>\n\t\t<\/span>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>Table of Contents Security Camera PCBA Design Guide: Day\/Night Switching and Infrared LED Driver Why Security Camera PCBA Design Matters for Day\/Night Operation A security<\/p>\n\t\t<\/div>\n\t\t\n\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/www.fs-pcba.com\/ja\/security-camera-pcba-day-night-switching-ir-led-driver\/\" aria-label=\"Read more about Security Camera PCBA Design Guide: Day\/Night Switching and Infrared LED Driver\" tabindex=\"-1\" >\n\t\t\tRead More \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-post__meta-data\">\n\t\t\t\t\t<span class=\"elementor-post-date\">\n\t\t\t10\u6708 6, 2026\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-43762 post type-post status-publish format-standard has-post-thumbnail hentry category-knowledge-of-pcb category-ordering-assistance tag-application tag-pcb-assembly tag-pcb-assembly-blog\" role=\"listitem\">\n\t\t\t<div class=\"elementor-post__card\">\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<span class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/www.fs-pcba.com\/ja\/agricultural-sensor-prototype-to-production\/\" >\n\t\t\t\tAgTech Case Study: Manufacturing 2,000+ Agricultural Sensor Devices from Prototype to Production\t\t\t<\/a>\n\t\t<\/span>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>Table of Contents AgTech Case Study: Manufacturing 2,000+ Agricultural Sensor Devices from Prototype to Production Designing an electronic prototype to large-scale production requires more than<\/p>\n\t\t<\/div>\n\t\t\n\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/www.fs-pcba.com\/ja\/agricultural-sensor-prototype-to-production\/\" aria-label=\"Read more about AgTech Case Study: Manufacturing 2,000+ Agricultural Sensor Devices from Prototype to Production\" tabindex=\"-1\" >\n\t\t\tRead More \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-post__meta-data\">\n\t\t\t\t\t<span class=\"elementor-post-date\">\n\t\t\t10\u6708 3, 2026\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<\/div>\n\t\t\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Table of Contents The Ultimate Guide to GND in a Circuit: Types, Design, Symbols and Best Practices Introduction GND in a circuit represents a common point where the electric current returns to the source. In case that current does not return, GND can literally save lives. A pressing question among most electronics manufacturers is What is GND In-Circuit? Ground, or \u201cGND\u201d in electronic design terminology, is considered an essential but rather misunderstood element in many electronic designs. Being referred to as \u201cthe zero-volt connection\u201d in many definitions, Grounding covers far more than most designs understand. Inadequate grounding design can result in anything from stray noises and signal degradation to persistent [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":42817,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","_templately_pack_id":"","_templately_imported_at":"","_templately_source":"","_templately_import_session_id":"","footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[17,1],"tags":[45],"class_list":["post-36245","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-of-pcb","category-default","tag-basic-pcba-knowledge"],"_links":{"self":[{"href":"https:\/\/www.fs-pcba.com\/ja\/wp-json\/wp\/v2\/posts\/36245","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fs-pcba.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fs-pcba.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fs-pcba.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fs-pcba.com\/ja\/wp-json\/wp\/v2\/comments?post=36245"}],"version-history":[{"count":0,"href":"https:\/\/www.fs-pcba.com\/ja\/wp-json\/wp\/v2\/posts\/36245\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fs-pcba.com\/ja\/wp-json\/wp\/v2\/media\/42817"}],"wp:attachment":[{"href":"https:\/\/www.fs-pcba.com\/ja\/wp-json\/wp\/v2\/media?parent=36245"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fs-pcba.com\/ja\/wp-json\/wp\/v2\/categories?post=36245"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fs-pcba.com\/ja\/wp-json\/wp\/v2\/tags?post=36245"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}