Copy Printed Circuit Board Schematic

● Copy Printed Circuit Board priority

FIRST: The principle of loose density: start copying electronic pcb board from the devices with simple connection relationship on the printed circuit board, and start copy PCB board from the area with the loosest connection to adjust the personal state.

SECOND: Core priority principle: For example, core parts such as DDR RAM should be routed first, and similar signal transmission lines should provide dedicated layers, power, and ground loops. Other secondary signals should take into account the whole and cannot contradict key signals.

THIRD: Priority of key signal lines: key signals such as power supply, analog small signal, high-speed signal, clock signal and synchronization signal are routed first.

● Ground return rules: The minimum loop rule is that the area of ​​the ring formed by the signal line and its loop should be as small as possible, and the area of ​​the ring should be as small as possible. In view of this rule, when dividing the ground plane of PCB board layout, the distribution of the ground plane and important signal traces should be considered to prevent the problems caused by the slotting of the ground plane.

In the case of space, the remaining part should be filled with the reference ground, some necessary vias should be added, the double-sided signals should be effectively connected, and some key signals should be isolated by ground wire as much as possible, special consideration should be given to the signal loop problem of its ground plane, and it is recommended to use a multi-layer PCB board schematic copying.