Even if the circuitry pattern and schematic diagram in the entire process of Reverse Engineering Circuit Card Power & Ground is completed well, the interference caused by the inconsistency of the power supply and the ground line may degrade the performance of the product, and sometimes even affect the success rate of the product.
Therefore, the wiring of electricity and ground wires should be taken seriously, and the noise interference generated by electricity and ground wires should be minimized to ensure the quality of the products.
Reverse Engineering Circuit Card Power & Ground
For every circuit card layout design engineer engaged in the Reverse Engineering Circuit Card Power & Ground, the reason for the noise between the ground and the power line is understood. Only the reduced noise suppression is described:
(1) It is well known to add a decoupling capacitor between the power supply and the ground.
(2), try to widen the power supply, ground line width, preferably the ground line is wider than the power line, their relationship is: ground line > power line > signal line, usually the signal line width is: 0.2 ~ 0.3mm, the most Fine width up to 0.05~0.07mm, power cord is 1.2~2.5 mm; for the PCB of the digital circuit, a wide ground wire can be used to form a loop, that is, a ground net is used for use (the ground of the analog circuit cannot be used in this way)
(3) Use a large-area copper layer for grounding, and connect the unused areas to the ground on the circuit card for grounding. Or make a multi-layer circuit card, power supply, ground line each occupy a layer.
