Categories: PCB Design

Where is the ground located in a PCB?

  • On a simple PCB, it’s often done as a ground fill. The fat, thick areas are often ground.
  • On a 2-layer PCB, you may have power fills as well. You can use generalizations like this to find the ground more easily if you’re examining a PCB, but you can’t know for certain without analyzing the circuit. It’s also typical for ground to be connected at the negative end of large electrolytic capacitors. Again, not in every case, but it’s a place to look for it.
  • Complex, high-speed, and high-density PCBs are multi-layer. Typically, at least one layer will be devoted to a ground plane. This is critical for both RF and high speed digital circuits such as PCI Express, USB, SATA, DDR DRAM, Ethernet, etc. Because critical signals are routed on impedance-controlled lines referenced to a ground plane. For us, we usually run microstrip lines on the top or bottom of the PCB, so there’s a ground layer right below the top and/or bottom layer.

Read More: Multi-layer PCB

#PCB Assembly

Oliver Smith

Oliver is an experienced electronics engineer skilled in PCB design, analog circuits, embedded systems, and prototyping. His deep knowledge spans schematic capture, firmware coding, simulation, layout, testing, and troubleshooting. Oliver excels at taking projects from concept to mass production using his electrical design talents and mechanical aptitude.

Recent Posts

  • PCB Manufacturing & Assembly

What Is a Backplane PCB? A Comprehensive Guide

Backplane PCB is the high-speed backbone that turns complex computing and communication systems into realities.…

  • PCB Manufacturing & Assembly

How to Desolder: A Step-by-Step Guide to 6 Effective Methods

The soldering of electronic components onto circuit boards is a very necessary step in PCB assembly. However,…

  • PCB Knowledge

What Causes PCB Short Circuit and How Can You Detect It?

Have you ever had your smartphone suddenly turn into a hand-warmer or stubbornly refuse to…

  • Electronic Components

Your Ultimate Guide to QFN Packages: Structure, Types, Benefits

The electronic devices are advancing rapidly, they require compact designs and efficiency. Among many choices…

  • PCB Manufacturing & Assembly

Solder Flux: What Is It and Why You Need It?

In the PCB assembly process, soldering is a very critical step. Through soldering, electronic components…

  • PCB Knowledge

Blue Circuit Board: Definition, Advantages and Manufacture

In addition to green PCB, the blue circuit board is the second most common type…