CN203896579U - Difference line structure for optimizing impedance - Google Patents
Difference line structure for optimizing impedance Download PDFInfo
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- CN203896579U CN203896579U CN201420152621.7U CN201420152621U CN203896579U CN 203896579 U CN203896579 U CN 203896579U CN 201420152621 U CN201420152621 U CN 201420152621U CN 203896579 U CN203896579 U CN 203896579U
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- signal line
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- 238000004804 winding Methods 0.000 claims abstract description 9
- 238000005452 bending Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000008054 signal transmission Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The utility model discloses a difference line structure for optimizing impedance. The difference routing structure comprises a first signal line and a second signal line. The length of the first signal line is less than the length of the second signal line. The width of the first signal line is partly more than or completely more than the width of the second signal line. The line width of one line of difference lines is added to make up for the impedance abrupt change caused by winding, and thus the difference impedance keeps continuous. The difference winding makes up for line length time delay, and the continuity of the difference impedance is kept. The difference line structure has advantages of simple structure and convenient manufacturing, and has good social and economic benefits. The difference line structure can be widely used for various difference lines.
Description
Technical field
The utility model relates to electric circuit construction, relates in particular to a kind of difference Wiring structure.
Background technology
PCB: printed circuit board (PCB).
Mil: long measure, 1 mil=0.0254 millimeter.
Difference cabling is the transmission line of a pair of existence coupling, is widely used in computer bus and ethernet device.What difference cabling transmitted is differential signal, and wherein one is carried signal, and another root carries its complementary signal, and receiving terminal judges the signal of reception by comparing the difference of these two signals.When differential signal transmits in difference cabling, better to the robustness of crosstalking and suddenly change in return path, be not vulnerable to the interference of switching noise.
Yet; the length difference of two cablings of difference cabling can cause between Difference signal pair time delay inconsistent; cause the conversion of differential mode male model; it is large etc. that the shake of signal becomes; in actual engineering design in order to keep the length of the cabling between differential lines consistent; conventionally can adopt the scheme (as shown in Figure 1) of coiling, and a problem of coiling scheme is easily to produce impedance discontinuity.
Utility model content
In order to solve the problems of the technologies described above, the purpose of this utility model is to provide a kind of track lengths of both can having avoided and postpones inconsistent problem, can keep again the continuous difference Wiring structure of impedance.
The technical scheme that the utility model adopts is:
Optimize a difference Wiring structure for impedance, it comprises first signal line and secondary signal line, and described secondary signal line has bending and/or outstanding winding section, and described first signal line width is partly greater than or is all greater than secondary signal line width.
Preferably, described first signal line has the those widened sections of widening live width in the position corresponding to winding section.
Preferably, it also comprises pcb board, and described pcb board is single or multiple lift pcb board, and described first signal line and secondary signal line can be arranged on any one deck on pcb board.
The beneficial effects of the utility model are:
The utility model compensates by increasing in difference cabling the wherein live width of a cabling change in the instantaneous impedance causing due to coiling, differential impedance is kept continuously, when making difference coiling compensation track lengths time delay, the continuity that has kept differential impedance, and there is simple in structure, convenient making, there is good society and economic benefit.
The utility model can be widely used in various difference cablings.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
Fig. 1 is prior art difference Wiring structure schematic diagram;
Fig. 2 is the structural representation of a kind of embodiment of the utility model;
Fig. 3 is the cross-sectional view of a kind of embodiment of the utility model.
Embodiment
It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.
As shown in Figure 2, a kind of difference Wiring structure of optimizing impedance, it comprises first signal line 1 and secondary signal line 2, and described secondary signal line 2 has bending and/or outstanding winding section 21, and described first signal line 1 width segments is greater than or is all greater than secondary signal line 2 width.Wherein, because difference cabling two linear distances are different, so secondary signal line 2 need to increase winding section length unequal between two holding wires of difference cabling from signal end outlet with compensation.Described first signal line 1 has the those widened sections 11 of widening live width in the position corresponding to winding section 21.It also comprises pcb board 3, and described pcb board 3 is single or multiple lift pcb board 3, and described first signal line and secondary signal line can be arranged on any one deck on pcb board 3.
As shown in Figure 3, as a kind of embodiment of the present utility model, described first signal line and secondary signal line be all at the same internal layer difference cabling of pcb board 3, and the width W 1 of the those widened sections of described first signal line is the height T of interval S between dielectric constant Er, first signal line and the secondary signal line of thickness H according to pcb board 3, pcb board 3 and two holding wires and definite.Certainly, layer also can different layers together for first signal line and first signal line.
The single-ended characteristic impedance Z 0 of two holding wires and differential line impedance Z d meet following computing formula:
Wherein, W is the width of first signal line 1, and e is natural number.In the present embodiment, differential impedance is 90 Europe, when first signal line 1 is not widened, the live width W1 of first signal line 1 and secondary signal line 2 live width W2 are 7mil, difference cabling impedance Z d is about 93 Europe, with respect to input impedance 90 Europe, there is sudden change, signal transmission is reflected, affected signal transmission quality; The live width of the those widened sections of first signal line 1 11 is widened as 9mil, make difference cabling impedance Z d approximate 90 Europe, that is to say and approach differential impedance, realized the continuous coupling of impedance, avoid differential transfer signal to reflect, effectively improved signal transmission quality.
The utility model compensates by increasing in difference cabling the wherein live width of a cabling change in the instantaneous impedance causing due to coiling, differential impedance is kept continuously, when making difference coiling compensation track lengths time delay, the continuity that has kept differential impedance, and there is simple in structure, convenient making, there is good society and economic benefit.The utility model can be widely used in various difference cablings.
More than that better enforcement of the present utility model is illustrated, but the invention is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent variations or replacement under the prerequisite without prejudice to the utility model spirit, and the distortion that these are equal to or replacement are all included in the application's claim limited range.
Claims (3)
1. a difference Wiring structure of optimizing impedance, it is characterized in that: it comprises first signal line and secondary signal line, described secondary signal line has bending and/or outstanding winding section, and described first signal line width is partly greater than or is all greater than secondary signal line width.
2. a kind of difference Wiring structure of optimizing impedance according to claim 1, is characterized in that: described first signal line has the those widened sections of widening live width in the position corresponding to winding section.
3. a kind of difference Wiring structure of optimizing impedance according to claim 1 and 2, it is characterized in that: it also comprises pcb board, described pcb board is single or multiple lift pcb board, and described first signal line and secondary signal line can be arranged on any one deck on pcb board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420152621.7U CN203896579U (en) | 2014-03-31 | 2014-03-31 | Difference line structure for optimizing impedance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420152621.7U CN203896579U (en) | 2014-03-31 | 2014-03-31 | Difference line structure for optimizing impedance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203896579U true CN203896579U (en) | 2014-10-22 |
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| CN201420152621.7U Expired - Lifetime CN203896579U (en) | 2014-03-31 | 2014-03-31 | Difference line structure for optimizing impedance |
Country Status (1)
| Country | Link |
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| CN (1) | CN203896579U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105740529A (en) * | 2016-01-27 | 2016-07-06 | 浪潮(北京)电子信息产业有限公司 | Method and system for regulating impedance of transmission line |
| CN105975703A (en) * | 2016-05-11 | 2016-09-28 | 浪潮电子信息产业股份有限公司 | To-be-laid route forming method, device and PCB |
| CN109496065A (en) * | 2018-12-30 | 2019-03-19 | 生益电子股份有限公司 | A kind of production method of impedance |
| CN113411946A (en) * | 2020-03-16 | 2021-09-17 | 浙江宇视科技有限公司 | Printed circuit board and manufacturing method thereof |
| WO2024045803A1 (en) * | 2022-08-30 | 2024-03-07 | 中兴通讯股份有限公司 | Printed circuit board, electronic device, and method for controlling propagation delay skew of differential pair |
-
2014
- 2014-03-31 CN CN201420152621.7U patent/CN203896579U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105740529A (en) * | 2016-01-27 | 2016-07-06 | 浪潮(北京)电子信息产业有限公司 | Method and system for regulating impedance of transmission line |
| CN105975703A (en) * | 2016-05-11 | 2016-09-28 | 浪潮电子信息产业股份有限公司 | To-be-laid route forming method, device and PCB |
| CN105975703B (en) * | 2016-05-11 | 2018-11-27 | 浪潮电子信息产业股份有限公司 | A kind of generation method, device and the PCB of cabling to be arranged |
| CN109496065A (en) * | 2018-12-30 | 2019-03-19 | 生益电子股份有限公司 | A kind of production method of impedance |
| CN109496065B (en) * | 2018-12-30 | 2021-07-13 | 生益电子股份有限公司 | Impedance manufacturing method |
| CN113411946A (en) * | 2020-03-16 | 2021-09-17 | 浙江宇视科技有限公司 | Printed circuit board and manufacturing method thereof |
| WO2024045803A1 (en) * | 2022-08-30 | 2024-03-07 | 中兴通讯股份有限公司 | Printed circuit board, electronic device, and method for controlling propagation delay skew of differential pair |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Difference line structure for optimizing impedance Effective date of registration: 20200313 Granted publication date: 20141022 Pledgee: Shenzhen hi tech investment small loan Co.,Ltd. Pledgor: SHENZHEN FASTPRINT CIRCUIT TECH Co.,Ltd. Registration number: Y2020980000703 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141022 |