Compatible Design Of Circuit Boards

Electromagnetic compatibility refers to the ability of electronic equipment to work harmoniously and effectively in various electromagnetic environments. The purpose is to make the electronic equipment not only suppress various external interference, make the electronic equipment work normally in a specific electromagnetic environment, but also reduce the electromagnetic interference of the electronic equipment itself to other electronic equipment.

1. Choose a reasonable wire width. The impact interference generated by the transient current on the printed lines of the PCB circuit board is mainly caused by the inductance component of the printed wires. Therefore, the inductance of the printed wires should be minimized.

2. Adopting the correct wiring strategy Using equal wiring can reduce the wire inductance, but the mutual inductance and distributed capacitance between the wires increase. If the layout allows, it is best to use a well-shaped mesh wiring structure. The specific method is that one side of the printed board is horizontal Route, run longitudinally on the other side, then connect with metallized vias at cross-over holes.

3. In order to suppress the crosstalk between the wires of the PCB circuit board, the long-distance equal wiring should be avoided as much as possible when designing the wiring, and the distance between the wires should be widened as much as possible. cross. Setting a grounded trace between some signal lines that are very sensitive to interference can effectively suppress crosstalk.