Reverse Engineering Circuit Board Wiring Design Ground & Power Strategy

Reverse Engineering Circuit Board Wiring Design Ground & Power Strategy can determine the general location of the electronic components, the ground plane and power plane can be defined. Realizing these planes requires some strategic skills.

Not using a ground plane in a printed circuit board wiring design is very dangerous, especially in the process of reverse engineering analog and mixed-signal PCB board designs.

First, because the analog signal is grounded, the ground noise problem is more difficult to deal with than the power supply noise problem. For example, in the circuit shown in Figure 1, the inverting input pin of the A/D converter (MCP3201) is grounded;

Second, the ground plane also has a shielding effect on noise. Using a ground plane can easily solve these problems, but without a ground plane, it is almost impossible to overcome these problems.