1, choose a reasonable wire width

　　Since the impact interference caused by the transient current on the printed line is mainly caused by the inductive component of the printed wire, the inductance of the printed wire should be minimized. The inductance of the printed wire is proportional to its length and inversely proportional to its width, so a short and fine wire is advantageous for suppressing interference. Signal lines for clock leads, line drivers, or bus drivers often carry large transient currents, and printed wires should be as short as possible. For discrete component circuits, when the width of the printed wire is about 1.5mm, the requirements can be fully met; For integrated circuits, the printed wire width can be selected between 0.2 and 1.0mm.

　　2, use the correct wiring strategy

　　The use of equal wiring can reduce the inductance of the wire, but the mutual inductance and distributed capacitance between the wires increase, if the layout allows, it is best to use a well-shaped network wiring structure, the specific practice is one side of the printed board is wired horizontally, the other side is wired vertically, and then connected with a metalized hole at the cross hole.

　　3, in order to suppress the crosstalk between the printed board wires, in the design of wiring should try to avoid long-distance equal wiring, as far as possible to open the distance between the line and the line, the signal line and the ground and the power line as far as possible do not cross. Crosstalk can be effectively suppressed by setting a ground printed line between some signal lines that are very sensitive to interference.

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