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Differential wire assembling method for eliminating high speed board interferes

A combination method and differential line technology, applied in the direction of reducing crosstalk, line transmission parts, electrical components, etc., can solve the problems of increasing wiring length and density, intricate wiring, and unsuitable high-density wiring circuit layout, etc., to save wiring Effect of space and crosstalk reduction

Inactive Publication Date: 2005-05-11
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this wiring method needs to meet a certain line length relationship in order to effectively eliminate crosstalk, and this will undoubtedly make the wiring more intricate, increase the length and density of the wiring, and is not suitable for the circuit pattern of high-density wiring.

Method used

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  • Differential wire assembling method for eliminating high speed board interferes
  • Differential wire assembling method for eliminating high speed board interferes
  • Differential wire assembling method for eliminating high speed board interferes

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Embodiment Construction

[0018] In a high-speed circuit board, the size of the crosstalk is inversely proportional to the spacing between the wirings, and proportional to the parallel length between the wirings. At the same time, the factors that affect the crosstalk include: the width of the wire, the thickness of the wire, the dielectric constant of the medium, and the dielectric constant of the medium. Thickness, the thickness of the pad, the path of the ground wire and the wiring around the wiring, etc. Therefore, when wiring, it is necessary to comprehensively coordinate various factors, and finally obtain the effect of reducing crosstalk or even making it zero.

[0019] One of the preferred embodiments of this case is as figure 2 As shown, the figure is at the dielectric constant ε r Differential pairs arranged in a rectangular arrangement in the same material, wherein, in this figure, there are two sets of differential pairs, the first differential pair 220 and the second differential pair 230...

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PUM

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Abstract

The invention consists of first differential pair and second differential pair. Each group of differential wire is composed of two wires. The array of the first differential pair and second differential pair appears geometry polygon. At least there is the wire one differential pair locating at different dielectric constant routing layer of high speed digital circuit. The wire of same differential pair can also locate at routing layer with same dielectric constant in high speed digital circuit. The first and second differential pair all can be taken as interference source or interference object.

Description

【Technical field】 [0001] The invention relates to a differential pair wiring method of a high-speed digital circuit, in particular to a differential wire combination method capable of eliminating crosstalk in a high-speed circuit board. 【Background technique】 [0002] The cause of crosstalk is that when a signal is transmitted on the transmission channel, it affects the adjacent transmission lines due to electromagnetic coupling, and a certain coupling voltage and coupling current are injected into the disturbed signal. In the field of digital circuit design, crosstalk exists widely, and with the increase of signal rate and the smaller and smaller product dimensions, the total crosstalk of digital systems also increases sharply. Excessive crosstalk will affect system performance, even Cause false triggering of the circuit, resulting in the system not working properly. [0003] In response to this situation, one of the methods commonly used in the industry is to use differen...

Claims

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Application Information

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IPC IPC(8): H04B3/32H05K1/00H05K3/00
Inventor 林有旭叶尚苍
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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