Layout wiring structure and wiring method for improving signal SI quality

Abstract

The invention discloses a Layout wiring structure for improving signal SI quality. Each of positive and negative differential routes in a PCB comprises a plurality of D1 sections, a plurality of D2 sections and a plurality of D3 sections; the D1 sections and the D2 sections of any differential route are arranged in parallel in a staggered manner; and any adjacent D1 and D2 sections of any differential route are connected through the D3 section. The invention furthermore discloses a Layout wiring method for improving the signal SI quality. The positive and negative differential routes parallel to each other on the PCB are subjected to wiring in a longitudinal repeated shift mode. The signal transmission delays on the positive and negative differential routes in a differential coupling pair are compensated for enabling the delays of signals, reaching a receiving end of a device, on the two routes to be same, so that the risk of differential mode to common mode noises is lowered and the signal SI quality of high-speed signals during long-distance transmission is improved.

Description

technical field [0001] The invention relates to the technical field of PCB design, in particular to a Layout wiring structure and a wiring method for improving signal SI quality. Background technique [0002] In the current motherboard design, in order to reduce the influence of the high-speed wiring signal transmission quality caused by the structure of the board, the usual way is to replace the board structure and use an open-woven cloth board, that is, add another layer of pressure to the glass cloth cluster of the board The process makes the glass cloth clusters expand to the surroundings, thereby eliminating the gap between the vertical and horizontal intersecting glass cloths, so as to balance the DK value difference of each point on the plate. [0003] Another way is to use the traditional board. When designing the PCB, for the high-speed wiring, the whole board uses a 10-degree diagonal line for wiring, so as to balance the DK difference felt on the P and N lines of ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a Layout wiring structure and a wiring method that improve signal SI quality, which is used to solve the problem of complex layout wiring, high development costs, and differences in the SI signal quality of two differential lines at the receiving end of the device signal in PCB design. The problem

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