Wiring Techniques for Double Layer Circuit Board.flexible pcb board_Shenzhen StarLight Industrial Development Co., Ltd.

Wiring Techniques for Double Layer Circuit Board.flexible pcb board

source:Other information release time:2023-07-21 Hits: Popular:PCB Assembly company: Share:

　　Using an automatic router to design a PCB is attractive. In most cases, automatic wiring will not have problems with the operation of pure digital circuits (especially circuits with low frequency signals and low density). However, when attempting to use automatic wiring tools provided by wiring software for analog, mixed signal, or high-speed circuit wiring, some problems may arise and may cause extremely serious circuit performance problems. There are many things to consider about wiring, but the more troublesome issue is the grounding method. If the grounding path starts from the upper layer, the grounding of each device is connected to the ground wire through a stay wire on that layer. For each device in the lower layer, a grounding circuit is formed by connecting the through hole on the right side of the circuit board to the upper layer. The immediate red flag that users will see when checking the wiring method indicates the presence of multiple grounding circuits. In addition, the grounding circuit of the lower layer is located horizontally. Can reduce digital switching δ I/ δ The impact of t on analog circuits. However, it should be noted that both of these double-layer boards have a grounding ground in the lower layer of the circuit board. This design is designed to allow engineers to quickly see the wiring during troubleshooting, which is often seen on device manufacturers' demonstration and evaluation boards. But a more typical approach is to lay a ground on the upper layer of the circuit board to reduce electromagnetic interference (EMI).

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