Wire winding design method and PCB

A design method and winding technology, which is applied in computer design circuit, design optimization/simulation, calculation, etc., can solve the problems of signal transmission quality influence, differential signal line mismatch length, etc.

Inactive Publication Date: 2017-02-22
ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, for some circuit boards with a small area, there is not enough space to realize the 3W2S winding method. Therefore, there are many situations where the lengths of differential signal lines do not match on the circuit boards with a small area, which affects the quality of signal transmission. influences

Method used

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  • Wire winding design method and PCB
  • Wire winding design method and PCB
  • Wire winding design method and PCB

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Experimental program
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Embodiment 1

[0040] like figure 1 As shown, the embodiment of the present invention provides a winding design method, and the method may include the following steps:

[0041] Step 101: Determine the total wire length that needs to be realized for the positive wire in the differential signal wire.

[0042] Step 102 : Determine a reference eye diagram value obtained by simulation when the positive wire is wound in a 3W2S winding manner.

[0043] Step 103: According to the total length of the winding and the reference eye diagram value, adjust the bump length corresponding to the positive wire in the range of (0, 3W) when winding, and adjust the bump height within the range of (0 , S), and simulate each winding, determine that the simulated eye diagram value is not less than the target adjustment result of the reference eye diagram value, and wind the positive line according to the target adjustment result. Wire.

[0044] Wherein, W is the line width of the differential signal line, and S ...

Embodiment 2

[0048] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] Please refer to figure 2 , the embodiment of the present invention provides a winding design method, the method may include the following steps:

[0050] Step 201: Determine the line width W and the spacing S of the positive line and the negative line in the differential signal line.

[0051] Please refer to image 3 , for a positive wire winding design, the line width W and spacing S are such as image 3 shown. Among them, the line widths of the positive and negative lines are equal.

[0052] Among them, W and S can be determined according to the stack file of SI (signal integrity, signal integrity) engineer.

[0053] Step 202 : Determine the total wire length that needs to be realized for the positive wire in the differenti...

Embodiment 3

[0080] An embodiment of the present invention further provides a PCB, comprising: a differential signal line; wherein the differential signal line includes a positive line and a negative line;

[0081] The positive line includes at least one protrusion, the length of the protrusion corresponding to each protrusion is in the range of (0, 3W), and the height of the protrusion corresponding to each protrusion is in the range of (0, S); The eye diagram value obtained during the simulation of the signal transmission of the differential signal line is not less than the corresponding reference eye diagram value when the positive line is wound according to the 3W2S winding method;

[0082] Wherein, W is the line width of the differential signal line, and S is the distance between the positive line and the negative line in the differential signal line.

[0083] In an embodiment of the present invention, the length of the protrusion is 2W.

[0084] In an embodiment of the present inven...

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Abstract

The invention discloses a wire winding design method and a PCB. The method includes the following steps that the total wiring length needing to be achieved by a positive wire in a differential signal line is determined; a reference eye diagram value obtained through simulation when the positive wire is wound in a 3W2S wire winding mode is determined; according to the total wire winding length and the reference eye diagram value, protruding length corresponding to the positive wire during wire winding is adjusted in the range of 0-3W, protruding height is adjusted in the range of 0-S, each time of wire winding is subjected to simulation, a target adjustment result with a simulation eye diagram value not smaller than the reference eye diagram value is determined, and the positive wire is wound according to the target adjustment result, wherein W is the width of the differential signal line, and S is the distance between the positive wire and a negative wire in the differential signal line. The method can guarantee high signal transmission quality in a small occupied area.

Description

technical field [0001] The invention relates to the technical field of printed circuit boards, and in particular, to a winding design method and a printed circuit board (PCB). Background technique [0002] With the advent of cloud computing, the development of servers has risen rapidly. In the design of servers, the signal rate is getting higher and higher, and the space design requirements and costs of high-speed signals on the motherboard are also increasing. As a widely used high-speed signal transmission method, differential signal has many advantages: 1. Strong anti-interference ability. The interference noise is generally equal and simultaneously loaded on the positive and negative lines of the differential signal line. Since the corresponding difference between the positive and negative lines is 0, the logic of the noise to the signal is Meaning doesn't matter. 2. Can effectively suppress electromagnetic interference. Since the positive line and the negative line a...

Claims

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Application Information

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IPC IPC(8): H05K1/02H05K3/00G06F17/50
CPCG06F30/20G06F30/392H05K1/0245H05K3/0005
Inventor张春丽李永翠
OwnerZHENGZHOU YUNHAI INFORMATION TECH CO LTD