CN111787687B - Printed circuit board - Google Patents
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- CN111787687B CN111787687B CN202010915091.7A CN202010915091A CN111787687B CN 111787687 B CN111787687 B CN 111787687B CN 202010915091 A CN202010915091 A CN 202010915091A CN 111787687 B CN111787687 B CN 111787687B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 258
- 230000008859 change Effects 0.000 abstract description 6
- 230000008054 signal transmission Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0213—Electrical arrangements not otherwise provided for
- H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
- H05K1/0228—Compensation of cross-talk by a mutually correlated lay-out of printed circuit traces, e.g. for compensation of cross-talk in mounted connectors
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0213—Electrical arrangements not otherwise provided for
- H05K1/0237—High frequency adaptations
- H05K1/025—Impedance arrangements, e.g. impedance matching, reduction of parasitic impedance
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- Engineering & Computer Science (AREA)
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- Physics & Mathematics (AREA)
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- Structure Of Printed Boards (AREA)
Abstract
The invention discloses a printed circuit board, comprising: n first transmission lines passing through the parallel line outgoing region; wherein N is a positive integer greater than or equal to 2; the line widths of the 1 st first transmission line to the Nth first transmission line in the parallel line outlet area are all first preset line widths; the line center spacing between two adjacent transmission lines from the 1 st first transmission line to the Nth first transmission line in the parallel line outlet area is a first preset spacing; auxiliary circles are arranged on the 1 st first transmission line to the Nth first transmission line in the parallel line outgoing area and used for changing the impedance of the first transmission line; the invention can arrange more transmission lines in a unit area by reducing the line width of the first transmission line in the parallel line outgoing area, thereby reducing the cost of the PCB; through the setting of the auxiliary circle, the influence of the line width change of the transmission line on the impedance is reduced, the crosstalk of the adjacent transmission lines is reduced, and the signal transmission quality of the transmission lines is ensured.
Description
Technical Field
The invention relates to the field of PCB design, in particular to a printed circuit board.
Background
In recent years, with the advent of high-speed transmission technologies of 10G, 25G, and even 100G, the signal rate on Printed Circuit Boards (PCBs) has become higher, and the demand for transmission lines as signal-carrying media has increased. Almost all high-speed transmission lines require impedance and crosstalk control to ensure the transmission quality of high-speed signals. Controlling impedance and crosstalk is mainly achieved by strictly controlling the line width and line spacing of transmission lines.
In the prior art, in a narrow area of a wire outlet space where the requirements of line width and line distance cannot be met, the traditional wiring method can only increase the wire outlet space by increasing the number of layers of the PCB, so that the cost of the PCB is obviously increased. Therefore, how to complete the PCB outgoing line with less PCB layers on the basis of satisfying the impedance requirement, thereby reducing the cost of the PCB, is a problem that needs to be solved nowadays.
Disclosure of Invention
The invention aims to provide a printed circuit board, which is used for completing PCB outgoing lines by using fewer PCB layers on the basis of meeting the impedance requirement of a transmission line, thereby reducing the cost of the PCB.
To solve the above technical problem, the present invention provides a printed circuit board, including: n first transmission lines passing through the parallel line outgoing region; wherein N is a positive integer greater than or equal to 2;
the line widths of the 1 st first transmission line to the Nth first transmission line in the parallel line outlet area are all first preset line widths; the line center spacing between two adjacent transmission lines from the 1 st first transmission line to the Nth first transmission line in the parallel line outlet area is a first preset spacing; and auxiliary circles are arranged on the 1 st first transmission line to the Nth first transmission line in the parallel line outlet area and used for changing the impedance of the first transmission line.
Optionally, the center distance between the adjacent auxiliary circles on each first transmission line in the parallel line outgoing region is a preset center distance.
Optionally, in the parallel line outgoing region, the distances from the centers of two adjacent auxiliary circles in the first target transmission line to the center of one auxiliary circle in the second target transmission line are equal; the first target transmission line and the second target transmission line are any two adjacent first transmission lines.
Optionally, in the parallel line outgoing region, distances from centers of two adjacent auxiliary circles in the first target transmission line to a center of one auxiliary circle in the second target transmission line are both the preset center-to-center distance.
Optionally, the printed circuit board further includes: two second transmission lines passing through the parallel outgoing line region;
the 1 st first transmission line is adjacent to the 2 nd first transmission line and the 1 st second transmission line respectively in the parallel line outgoing region, and the Nth first transmission line is adjacent to the (N-1) th first transmission line and the 2 nd second transmission line respectively in the parallel line outgoing region;
the line widths of the 1 st second transmission line and the 2 nd second transmission line in the parallel line outlet area are both second preset line widths, and the second preset line widths are larger than the first preset line widths;
in the parallel line outgoing region, the line center distance between the 1 st second transmission line and the 1 st first transmission line and the line center distance between the 2 nd second transmission line and the Nth first transmission line are both second preset distances; the second preset distance is greater than or equal to the first preset distance.
Optionally, the first preset distance is 3 times the first preset line width, and the second preset distance is 3 times the second preset line width.
Optionally, the line widths of the N first transmission lines are the first preset line width, the N auxiliary circles are arranged on the first transmission lines outside the parallel line outlet area, and the line widths of the 2 second transmission lines are the second preset line width.
Optionally, the auxiliary circle is circular.
Optionally, the center of the auxiliary circle is located on the central line of the first transmission line, and the diameter of the auxiliary circle is larger than the first preset line width.
Optionally, the diameter of the auxiliary circle is the second preset line width.
The invention provides a printed circuit board, comprising: n first transmission lines passing through the parallel line outgoing region; wherein N is a positive integer greater than or equal to 2; the line widths of the 1 st first transmission line to the Nth first transmission line in the parallel line outlet area are all first preset line widths; the line center spacing between two adjacent transmission lines from the 1 st first transmission line to the Nth first transmission line in the parallel line outlet area is a first preset spacing; auxiliary circles are arranged on the 1 st first transmission line to the Nth first transmission line in the parallel line outgoing area and used for changing the impedance of the first transmission line;
therefore, by arranging the N first transmission lines in the parallel line outgoing region, compared with the prior art, the invention can reduce the line width of the first transmission lines in the parallel line outgoing region, so that more transmission lines can be arranged in a unit area, thereby reducing the PCB cost; the auxiliary circle is arranged on the first transmission line in the parallel wire outlet area, so that the influence of line width change of the transmission line on impedance can be reduced, the crosstalk of adjacent transmission lines can be reduced, and the signal transmission quality of the transmission line is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a parallel line-out region of a printed circuit board according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a parallel line-out area of a printed circuit board according to the prior art;
fig. 3 is a schematic structural diagram of a parallel line-out region of another printed circuit board according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a printed circuit board according to an embodiment of the present invention. The circuit board may include: n first transmission lines 20 passing through the parallel line outgoing region 10; wherein N is a positive integer greater than or equal to 2;
the line widths of the 1 st first transmission line 20 to the Nth first transmission line 20 in the parallel outgoing line region 10 are all a first preset line width; the line center distances between two adjacent transmission lines from the 1 st first transmission line 20 to the Nth first transmission line 20 in the parallel outgoing line region 10 are all first preset distances; auxiliary circles 30 are arranged on the 1 st first transmission line 20 to the nth first transmission line 20 in the parallel outgoing line region 10, and are used for changing the impedance of the first transmission line 20.
It can be understood that the parallel outgoing line region 10 in this embodiment may be a region on a Printed Circuit Board (PCB) where a plurality of transmission lines are required to be arranged in parallel, for example, when the transmission lines in the parallel outgoing line region 10 are straight lines, the plurality of transmission lines in the parallel outgoing line region 10 may be parallel, as shown in fig. 3, 5 transmission lines (i.e., 3 first transmission lines 20 and 2 second transmission lines) are arranged in parallel in the parallel outgoing line region 10; if the transmission lines in the parallel line outgoing region 10 are linear curves (e.g., S-shaped curves), two adjacent transmission lines in the parallel line outgoing region 10 may be arranged in parallel at a fixed line center distance, as long as N transmission lines are ensured to exist in the parallel line outgoing region 10, and every 2 adjacent transmission lines in the N transmission lines in the listed line region are arranged in parallel at a corresponding line center distance, which does not limit the specific selection of the parallel line outgoing region 10 in this embodiment.
Correspondingly, the purpose of the present embodiment may be to set the line widths of the N first transmission lines 20 in the parallel outgoing line region 10, and compared with the prior art, the line widths of the N first transmission lines 20 in the parallel outgoing line region 10 are reduced, so that more parallel transmission lines may be arranged in the parallel outgoing line region 10, and there is no need to increase the outgoing line space by increasing the number of layers of the PCB as in the prior art; and through the arrangement of the auxiliary circles 30 on the N first transmission lines 20 in the parallel outgoing line region 10, the influence of the line width change of the N first transmission lines 20 in the parallel outgoing line region 10 on the impedance can be reduced, and the crosstalk of adjacent lines can be reduced, so that the signal transmission quality is ensured.
Specifically, the first transmission lines 20 in this embodiment may be transmission lines provided with auxiliary circles 30 and arranged in parallel in the parallel outgoing line region 10, and in this embodiment, the 1 st to nth first transmission lines 20 in the parallel outgoing line region 10 may be N first transmission lines 20 arranged in parallel in the parallel outgoing line region 10 in sequence, as shown in fig. 3, when N is 3, the 1 st to 3 rd transmission lines may be transmission lines 22, 23, and 24, respectively, in sequence.
It should be noted that the printed circuit board provided in this embodiment may further include a second transmission line passing through the parallel outgoing line region 10; wherein the second transmission line may be a conventional transmission line without the auxiliary circle 30 in the prior art, such as 4 transmission lines in fig. 2 and the transmission lines 21 and 25 in fig. 3. The specific number of the second transmission lines and the setting position in the parallel outgoing line region 10 may be set by a designer according to a use scenario and a user requirement, for example, the number of the second transmission lines may be 1, that is, the second transmission lines in the parallel outgoing line region 10 may be set at one side of N parallel first transmission lines 20, for example, the 1 st first transmission line 20 in the parallel outgoing line region 10 may be adjacent to the 2 nd first transmission line 20 and the second transmission line, or the nth first transmission line 20 in the parallel outgoing line region 10 may be adjacent to the N-1 st first transmission line 20 and the second transmission line, respectively. If the number of the second transmission lines may be 2 or more, for example, if the number of the second transmission lines is 2, two second transmission lines in the parallel outgoing line region 10 may be disposed on two sides of the N first transmission lines 20 arranged in parallel, that is, the 1 st first transmission line 20 in the parallel outgoing line region 10 is adjacent to the 2 nd first transmission line 20 and the 1 st second transmission line, and the nth first transmission line 20 in the parallel outgoing line region 10 is adjacent to the N-1 st first transmission line 20 and the 2 nd second transmission line, respectively, such as the transmission line 21 and the transmission line 25 in fig. 3; the two second transmission lines in the parallel outgoing line region 10 may also be disposed at one side of the N parallel first transmission lines 20, which is not limited in this embodiment.
Specifically, the line width of each second transmission line in the parallel line outgoing region 10 may be a second preset line width, and the second preset line width is greater than the first preset line width; the line center distance between each second transmission line and the adjacent transmission line (the first transmission line 20 or the second transmission line) in the parallel outgoing line region 10 is a second preset distance, and the second preset distance is greater than or equal to the first preset distance.
As shown in fig. 3, the printed circuit board may further include: two second transmission lines passing through the parallel outgoing line region 10; wherein, the 1 st first transmission line 20 in the parallel outgoing line region 10 is adjacent to the 2 nd first transmission line 20 and the 1 st second transmission line respectively, and the nth first transmission line 20 in the parallel outgoing line region 10 is adjacent to the N-1 st first transmission line 20 and the 2 nd second transmission line respectively; the line widths of the 1 st second transmission line and the 2 nd second transmission line in the parallel line outgoing region 10 are both second preset line widths, and the second preset line widths are larger than the first preset line widths; in the parallel outgoing line region 10, the line center distance between the 1 st second transmission line and the 1 st first transmission line 20 and the line center distance between the 2 nd second transmission line and the nth first transmission line 20 are both second preset distances; the second preset distance is greater than or equal to the first preset distance. Accordingly, the impedances of the 5 transmission lines (i.e., 3 first transmission lines 20 and 2 second transmission lines) in fig. 3 may be equal.
For easy understanding, in the parallel outgoing line region 10 of the PCB shown in fig. 2 and 3, the line width (i.e., the second preset line width) of the transmission line (i.e., the second transmission line) satisfying the impedance requirement of the conventional transmission line (i.e., the second transmission line) is denoted by W, the line center distance (the second preset distance) is denoted by 3W, and in the parallel outgoing line region 10 shown in fig. 2, four transmission lines (i.e., the second transmission line) of the line 1, the line 2, the line 3 and the line 4 are sequentially arranged according to the prior art, if a transmission line (i.e., the line 5) with the same impedance is to be added, due to space limitation, the conventional method can only put the line 5 to other layers of the PCB; as shown in fig. 3, in this embodiment, the line widths of the two middle transmission lines (line 2 and line 3) may be reduced to W (i.e., a first preset line width) while maintaining the line widths of line 1 (transmission line 21) and line 4 (transmission line 25) to be W, the interval between line 1 and line 2 (transmission line 22) to be 3W, and the interval between line 3 (transmission line 24) and line 4 to be 3W, line 5 (transmission line 23) having a line width W may be inserted between the two lines, the line center interval between line 3, line 4, and line 5 may be a first preset interval (e.g., 3W), and auxiliary circles 30 may be added to the respective lines of line 3, line 4, and line 5 to eliminate the influence of the line width on the impedance, so that the impedances of line 3, line 4, and line 5 may be the same as the impedances of line 1 and line 2, and crosstalk of adjacent transmission lines may be reduced.
Specifically, the specific arrangement manner of the auxiliary circle 30 on each first transmission line 20 in the parallel outgoing line region 10 in the present embodiment may be set by a designer, for example, the auxiliary circle 30 may be a circle or an ellipse. The auxiliary circles 30 may be spaced on the first transmission lines 20, for example, when the auxiliary circles 30 are circular, the center distances between adjacent auxiliary circles 30 on each first transmission line 20 in the parallel outgoing line region 10 may be the preset center distances; when the auxiliary circles 30 are elliptical, the distances between the centers of the two focuses of the adjacent auxiliary circles 30 on each first transmission line 20 in the parallel outgoing line region 10 may be the preset center distance. If the first transmission line 20 in the parallel outgoing line region 10 is a straight line, the distances from the centers of two adjacent auxiliary circles 30 in the first target transmission line to the center of one auxiliary circle 30 in the second target transmission line in the parallel outgoing line region 10 are equal; the first target transmission line and the second target transmission line are any two adjacent first transmission lines 20; so that the interval position of the auxiliary circles 30 (i.e. the preset center-to-center distance, as shown in fig. 3D) is defined by the connection line of the centers of 3 adjacent auxiliary circles 30 on any two adjacent first transmission lines 20 to form an equilateral triangle or an isosceles triangle; as shown in fig. 3, when the auxiliary circles 30 are circular and the centers of the auxiliary circles 30 are located on the center line of the first transmission line 20, the distances from the centers of two adjacent auxiliary circles 30 in the first target transmission line to the center of one auxiliary circle 30 in the second target transmission line in the parallel line outgoing region 10 are both preset center-to-center distances (D), that is, the center connecting lines of 3 adjacent auxiliary circles 30 on any two adjacent first transmission lines 20 form an equilateral triangle. The present embodiment does not set any limit to this.
Correspondingly, when the auxiliary circle 30 is circular and the center of the auxiliary circle 30 is located on the center line of the first transmission line 20, the diameter of the auxiliary circle 30 on the first transmission line 20 may be larger than the line width of the first transmission line 20 (i.e. a first predetermined line width) to change the impedance of the first transmission line 20, so that the impedance of the first transmission line 20 is equal to the impedance of the transmission line with the line width set in the conventional manner as a second predetermined line width (i.e. a second transmission line), for example, the diameter of the auxiliary circle 30 may be the second predetermined line width.
Correspondingly, in this embodiment, if the space width of the parallel line region 10 of the PCB is PS and the number of the linear transmission lines that need to be arranged in parallel in the parallel line region 10 is M, the space width LS = M × W + (M-1) × 3W occupied by M transmission lines can be calculated; if LS/PS is less than or equal to 1, wiring can be carried out according to a traditional method, and M second transmission lines with the line width W are arranged in the parallel outgoing line area 10; if LS/PS >1, using the PCB provided by the embodiment to change the line width of part of the transmission line from W to W (W < W) and then wiring; the specific value of w can be comprehensively determined according to the number of layers of PS, LS and PCB, and the distance between the central lines of the transmission lines (namely the first transmission lines 20) with the line width changed into w is correspondingly changed into 3 w; note that the line spacing of the line width W remains as constant as 3W as possible; to ensure that the cross talk in this section is constant.
Specifically, as shown in fig. 3, in the process of designing the parallel outgoing line region 10 of the PCB, it may be checked whether the impedance of the first transmission line 20 in the parallel outgoing line region 10 may meet the design requirement according to the signal margin of the first transmission line 20 obtained by simulation, and if not, the impedance of the first transmission line 20 may be adjusted again by reducing the difference between W (the second preset line width) and W (the first preset line width) and the number of the inserted W transmission lines until the impedance of the first transmission line 20 meets the design requirement.
Correspondingly, for the specific value settings of the first preset line width, the first preset interval, the second preset line width and the second preset interval in this embodiment, the designer can set the values according to practical scenes and user requirements, for example, the line width of the second transmission line (i.e., the second preset line width) can realize the line width (e.g., W in fig. 3) required by the transmission line impedance and crosstalk according to the conventional line width design method; to meet the crosstalk requirement, the second predetermined pitch may be defined as a second predetermined line width (e.g. 3W in fig. 3) which is 3 times larger than the first predetermined pitch, or may be defined as a multiple of the thickness of the PCB medium; the first preset line width can be comprehensively determined according to the space width LS occupied by PS and M transmission lines and the number of layers of the PCB in the space width of the parallel outgoing line region 10; the first preset distance may be a first preset line width (e.g. 3w in fig. 3) which is 3 times larger than the first preset distance, that is, the first preset distance is smaller than the second preset distance, and the first preset distance may also be equal to the second preset distance, for example, the first preset distance and the second preset distance may be the same multiple of the thickness of the PCB medium. The present embodiment does not set any limit to this.
It should be noted that, in this embodiment, the transmission line portions of the N first transmission lines 20 passing through the parallel line-out region 10 in the parallel line-out region 10 are shown as an example, that is, in this embodiment, the line widths of the transmission line portions in the parallel line-out region 10 in the 1 st first transmission line 20 to the nth first transmission line 20 are all the first preset line widths, the line center distances between two adjacent transmission lines of the transmission line portions in the parallel line-out region 10 are all the first preset distances, and the auxiliary circles 30 are all disposed on the transmission line portions in the parallel line-out region 10. For the transmission line portions of the N first transmission lines 20 passing through the parallel outgoing line region 10 and outside the parallel outgoing line region 10, the designer may set the transmission line portions by himself, for example, the transmission line portions of the N first transmission lines 20 passing through the parallel outgoing line region 10 and outside the parallel outgoing line region 10 may be correspondingly set in the same manner as the transmission line portions in the parallel outgoing line region 10, that is, the line widths of the N first transmission lines 20 are all the first preset line width, and the N first transmission lines 20 outside the parallel outgoing line region 10 are all provided with the auxiliary circles 30.
In this embodiment, by arranging the N first transmission lines 20 in the parallel outgoing line region 10, compared with the prior art, the line width of the first transmission lines 20 in the parallel outgoing line region 10 can be reduced, so that more transmission lines can be arranged in a unit area, thereby reducing the cost of the PCB; the auxiliary circle 30 arranged on the first transmission line 20 in the parallel outgoing line region 10 can reduce the influence of line width change of the transmission line on impedance, and can also reduce crosstalk of adjacent transmission lines, thereby ensuring the signal transmission quality of the transmission lines.
The printed circuit board provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (5)
1. A printed circuit board, comprising: n first transmission lines passing through the parallel line outgoing region; wherein N is a positive integer greater than or equal to 2;
the line widths of the 1 st first transmission line to the Nth first transmission line in the parallel line outlet area are all first preset line widths; the line center spacing between two adjacent transmission lines from the 1 st first transmission line to the Nth first transmission line in the parallel line outlet area is a first preset spacing; auxiliary circles are arranged on the 1 st first transmission line to the Nth first transmission line in the parallel line outgoing area and used for changing the impedance of the first transmission line;
the center distance between the adjacent auxiliary circles on each first transmission line in the parallel wire outlet area is a preset center distance; the distances from the centers of two adjacent auxiliary circles in the first target transmission line to the center of one auxiliary circle in the second target transmission line in the parallel wire outlet area are equal; the first target transmission line and the second target transmission line are any two adjacent first transmission lines; the distance from the center of two adjacent auxiliary circles in the first target transmission line to the center of one auxiliary circle in the second target transmission line in the parallel line outgoing region is the preset center-to-center distance;
the auxiliary circle is circular, the circle center of the auxiliary circle is located on the central line of the first transmission line, and the diameter of the auxiliary circle is larger than the first preset line width.
2. The printed circuit board of claim 1, further comprising: two second transmission lines passing through the parallel outgoing line region;
the 1 st first transmission line is adjacent to the 2 nd first transmission line and the 1 st second transmission line respectively in the parallel line outgoing region, and the Nth first transmission line is adjacent to the (N-1) th first transmission line and the 2 nd second transmission line respectively in the parallel line outgoing region;
the line widths of the 1 st second transmission line and the 2 nd second transmission line in the parallel line outlet area are both second preset line widths, and the second preset line widths are larger than the first preset line widths;
in the parallel line outgoing region, the line center distance between the 1 st second transmission line and the 1 st first transmission line and the line center distance between the 2 nd second transmission line and the Nth first transmission line are both second preset distances; the second preset distance is greater than or equal to the first preset distance.
3. The pcb of claim 2, wherein the first predetermined pitch is 3 times the first predetermined line width, and the second predetermined pitch is 3 times the second predetermined line width.
4. The printed circuit board of claim 2, wherein the line widths of N first transmission lines are all the first predetermined line width, the auxiliary circle is disposed on N first transmission lines outside the parallel line outlet region, and the line widths of 2 second transmission lines are all the second predetermined line width.
5. The printed circuit board of claim 2, wherein the auxiliary circle has a diameter of the second predetermined line width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010915091.7A CN111787687B (en) | 2020-09-03 | 2020-09-03 | Printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010915091.7A CN111787687B (en) | 2020-09-03 | 2020-09-03 | Printed circuit board |
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| Publication Number | Publication Date |
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| CN111787687A CN111787687A (en) | 2020-10-16 |
| CN111787687B true CN111787687B (en) | 2021-03-02 |
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| CN202010915091.7A Active CN111787687B (en) | 2020-09-03 | 2020-09-03 | Printed circuit board |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101909402A (en) * | 2009-06-05 | 2010-12-08 | 鸿富锦精密工业（深圳）有限公司 | Printed circuit board |
| CN101965096A (en) * | 2009-07-24 | 2011-02-02 | 鸿富锦精密工业（深圳）有限公司 | Flexible circuit board |
| CN105025668A (en) * | 2015-07-02 | 2015-11-04 | 浪潮电子信息产业股份有限公司 | Method for realizing impedance matching of routing by adding via hole |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9240621B2 (en) * | 2009-06-24 | 2016-01-19 | Intel Corporation | Micro-strip crosstalk compensation using stubs |
| US9515031B2 (en) * | 2011-12-29 | 2016-12-06 | Intel Corporation | Mitigation of far-end crosstalk induced by routing and out-of-plane interconnects |
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2020
- 2020-09-03 CN CN202010915091.7A patent/CN111787687B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101909402A (en) * | 2009-06-05 | 2010-12-08 | 鸿富锦精密工业（深圳）有限公司 | Printed circuit board |
| CN101965096A (en) * | 2009-07-24 | 2011-02-02 | 鸿富锦精密工业（深圳）有限公司 | Flexible circuit board |
| CN105025668A (en) * | 2015-07-02 | 2015-11-04 | 浪潮电子信息产业股份有限公司 | Method for realizing impedance matching of routing by adding via hole |
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| CN111787687A (en) | 2020-10-16 |
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