Printed circuit board (PCB) high-speed signal line track control method

Abstract

The invention provides a printed circuit board (PCB) high-speed signal line track control method. The specific control process of the PCB high-speed signal line track control method comprises selecting PCB wiring route points; timely and dynamically fitting PCB wiring; reading the wiring route points in a batching mode; drawing segmentation fitted curves; slightly adjusting distribution of the wiring route points; redrawing the segmentation fitted curves; and generating whole fitted curves. Compared with the prior art, the PCB high-speed signal line track control method solves the phenomenon that during practical high-speed signal PCB wiring, signal line widths in inflection wiring points change in an obtuse angle wiring mode, in an acute angle wiring mode and the like, and therefore impedance of a transmission line is discontinuous.

Description

technical field [0001] The present invention relates to the technical field of computer communication, and specifically uses a method to solve the problem that in the actual high-speed signal PCB wiring, the signal line width changes at the inflection point of the line such as obtuse angle and acute angle, which causes the discontinuous phenomenon of transmission line impedance. Design method of PCB high-speed signal line trajectory control based on B-spline dynamic fitting. Background technique [0002] The frequency of high-speed signals involved in server motherboards continues to increase, and the PCB layout has gradually become one of the key factors determining the overall performance of the system, which is directly related to the overall signal transmission quality of the system; at the same time, the rate of change of the signal edge is getting faster and faster. The electromagnetic interference problem related to PCB wiring also urgently needs to be paid attention ...

AI Technical Summary

Problems solved by technology

In the actual high-speed signal PCB layout, obtuse angles, acute angles and other routing methods are widely used, but because the above-mentioned routing methods change the signal line width at the inflection point of the routing, resulting in a discontinuous phenomenon of transmission line impedance, this phenomenon is in response to impedance changes. Especially in sensitive ultra-high-speed signal systems, it is necessary to avoid

Although the obtuse angle routing method with the largest angle as possible can reduce the discontinuity of the transmission line impedance, but at the same time it will increase the total length of the routing, especially for high-speed signal lines that have requirements for the length of the wire. become very inflexible

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