Electromagnetic compatibility refers to the ability of electronic equipment to work in a coordinated and effective manner in various electromagnetic environments. The purpose is to enable electronic equipment to suppress all kinds of external interference, so that the electronic equipment can work normally in a specific electromagnetic environment, and at the same time to reduce the electromagnetic interference of the electronic equipment itself to other electronic equipment.

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

2. Using the correct wiring strategy and 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 grid-shaped wiring structure with a cross-cut pattern. The specific method is that one side of the printed board is horizontal. Wiring, the other side of the vertical wiring, and then use metallized holes at the cross hole to connect.

3. In order to suppress the crosstalk between the wires of the PCB circuit board, when designing the wiring, try to avoid long-distance equal wiring, and extend the distance between the wires as much as possible, and the signal wire and the ground wire and the power wire should not be as much as possible. cross. Setting a grounded printed line between some signal lines that are very sensitive to interference can effectively suppress crosstalk.