How to check whether the drawing wiring in the PCB board design is correct?
After routing the #PCB, you need to check the design rules of the PCB to ensure that the design scheme of the PCB meets the requirements and all networks are correctly connected. The commonly used inspection items in the inspection of PCB design rules are as follows:
1. Whether the distance between wire and wire, wire and component, wire and pad, component and through hole, pad and pad is effective, and whether the manufacturing process is considered.
2. Change some unwanted cables.
3, digital integrated circuit and digital circuit design whether there is a separate ground.
4, whether the pattern added on the PCB board (such as marks, labels) will cause data signal short circuit fault.
5. Whether the boundary of the geological structure of the switching power supply in the double-layer circuit board becomes smaller, such as the bare copper of the geological structure of the switching power supply, which is easy to cause short circuit fault.
6. Whether the total width of the power plug and the ground wire is suitable, whether the switching power supply and the ground wire are tightly coupled, first of all, it is necessary to see whether there is an area that can widen the ground wire.
7, the important power line is taken the best response, such as the shortest length, increase maintenance line, input line and output line is obviously separated.
8. Whether there is a processing line on the PCB board, whether the solder resistance layer meets the production process requirements, whether the solder resistance layer specifications are appropriate, and whether the mark is pressed on the component solder layer.
The results of the rule check of the design scheme can be divided into two categories: one is to report the output and generate the check result table; The other is online inspection, that is, the electrical equipment rules and wiring rules of the PCB circuit board in the whole process of PCB circuit board wiring. Check. PCB design rules include electrical equipment rules, wiring rules, reasonable layout rules, high-speed circuit principle rules, signal integrity rules, etc. Through the learning and training of this chapter, we have a detailed grasp of the PCB design rules. Circuit board, laying the foundation for high-performance PCB circuit boards.