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Method for optimizing via holes of high-speed signal of PCB

A high-speed signal and via technology, applied in the field of signal processing, can solve problems affecting the continuity and loss of link impedance, achieve the effect of refining the design range, optimizing link impedance, and reducing loss

Active Publication Date: 2018-11-16
ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The design scheme shortens the via stub and introduces an additional via, which will still affect the impedance continuity and loss of the link, even worse than the original design

Method used

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  • Method for optimizing via holes of high-speed signal of PCB
  • Method for optimizing via holes of high-speed signal of PCB
  • Method for optimizing via holes of high-speed signal of PCB

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Embodiment Construction

[0029] The following is attached Figure 1-10 The features and principles of the present invention are described in detail, and the examples given are only used to explain the present invention, not to limit the protection scope of the present invention.

[0030] The technical solution adopted by the present invention to solve the technical problem is: the method of optimizing the PCB high-speed signal via hole, aiming at the PCB with the same thickness stacked, under the condition that the high-speed signal trace length remains unchanged, the different lengths on the PCB are passed through. The hole stubs were changed to U-shaped vias, and the insertion loss and return loss simulations were performed on the unmodified via stubs and the modified U-shaped vias, and the simulation results of the two were compared to obtain the via design scheme.

[0031] Such as figure 1 As shown, for the PCB with the same through hole length, change the length of the via stub, and carry out U-...

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Abstract

The invention discloses a method for optimizing via holes of a high-speed signal of a PCB. For the stacked PCB with the same thickness, via stubs with different lengths on the PCB are changed to U-shaped via holes under the condition of ensuring the routing length of a high-speed signal to be unchanged; insertion loss and return loss simulation is performed on the via stubs before modification andthe U-shaped via holes after modification; simulation results of the via stubs before modification and the U-shaped via holes after modification are compared; and a via hole design scheme is obtained. The U-shaped via hole design is carried out for the via stubs with the different lengths; impedance and loss indexes before and after design under various conditions are compared; and application conditions of the U-shaped via hole design are obtained, so that finer guidance is provided for the via hole optimization design. Namely, by weighing the influence of the U-shaped design in advance, thedesign range is refined, so that the over-design is avoided.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a method for optimizing PCB high-speed signal vias. Background technique [0002] In traditional digital system designs, high-speed interconnect phenomena are often negligible because they have little impact on system performance. However, with the continuous development of computer technology, among many factors that determine system performance, high-speed interconnection phenomenon is playing a leading role, which often leads to some unforeseen problems and greatly increases the complexity of system design. Therefore, in the design of high-speed links, it is necessary to optimize each module as much as possible, evaluate the design feasibility and risk points in advance with the help of simulation tools, and optimize the design based on the simulation results to improve the success rate of system design and shorten the development cycle. [0003] In the design proce...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/398G06F30/20
Inventor 荣世立
Owner ZHENGZHOU YUNHAI INFORMATION TECH CO LTD