CN109271666A - A kind of method and system calculating signal wire breakout zone length - Google Patents
A kind of method and system calculating signal wire breakout zone length Download PDFInfo
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- CN109271666A CN109271666A CN201810893604.1A CN201810893604A CN109271666A CN 109271666 A CN109271666 A CN 109271666A CN 201810893604 A CN201810893604 A CN 201810893604A CN 109271666 A CN109271666 A CN 109271666A
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- G06F30/30—Circuit design
- G06F30/39—Circuit design at the physical level
- G06F30/398—Design verification or optimisation, e.g. using design rule check [DRC], layout versus schematics [LVS] or finite element methods [FEM]
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Abstract
This application discloses a kind of method and systems for calculating signal wire breakout zone length by the application, this method comprises: obtaining the line width and line-spacing of measured signal line；According to the line width and line-spacing of measured signal line, the region breakout of measured signal line is determined；According to the region the normal wire length of the overall length of measured signal line and measured signal line, utilize formula: the breakout zone length of measured signal line is calculated in the region the breakout wire length=region net overall length-normal wire length.The system includes: that line width and line-spacing obtain module, breakout area determination module and computing module.Pass through the method and system in the application, it can be avoided in the region breakout and the region normal line width junction line cut disconnected the step of connecting again, to greatly improve the computational efficiency of the region breakout wire length and calculate accuracy, be conducive to the design efficiency for improving PCB.
Description
Technical field
This application involves server master board PCB (Printed Circuit Board, printed circuit board) designing technique necks
Domain, more particularly to a kind of method and system for calculating signal wire breakout zone length.
Background technique
In the PCB design phase of server master board, carry out DDR (Double Data Rate, Double Data Rate synchronous dynamic with
Machine memory) module design when, according to the requirement of Intel PDG (Platform Design Guide, Platform Designing guide),
It needs to add interdigital tabbed when the length in the region CPU breakout is more than 500mil and (refers to a label, referred to as
Tab), to balance the impedance matching and crosstalk between DDR signal line, to improve the accuracy and transmission rate of signal transmission.
Therefore, in the PCB design phase of server master board, measure and determine that the length in the region CPU breakout is a major issue.
Currently, the method for measurement CPU breakout zone length is usually: in PCB design software, first existing
Then the line width junction in the region breakout and the region normal measures line cut disconnected (simulate and cut in PCB software)
The length in the region breakout finally reconnects the cut line to break, to complete the survey of CPU breakout zone length
Amount.
However, connecting, grasping again due to needing to break line cut in the method for measurement CPU breakout zone length at present
Make cumbersome, and being easy to produce error causes measurement result inaccurate.Therefore, current measurement method cause PCB design efficiency compared with
It is low.
Summary of the invention
This application provides the method and systems for calculating signal wire breakout zone length, to solve to survey in the prior art
Measure the cumbersome and not accurate enough problem of measurement result.
In order to solve the above-mentioned technical problem, the embodiment of the present application discloses following technical solution:
A method of calculating signal wire breakout zone length, comprising:
The line width and line-spacing of measured signal line are obtained, the line width includes: to match with the region breakout of signal wire
The first line width and the second line width for matching with the region normal of signal wire, the line-spacing include: and signal wire
The First Line that the region breakout matches away from and with signal wire the second line-spacing for matching of the region normal；
According to the line width and line-spacing of measured signal line, the region breakout of measured signal line is determined；
According to the region the normal wire length of the overall length of measured signal line and measured signal line, measured signal line is calculated
Breakout zone length.
Optionally, the line width and line-spacing according to measured signal line determines the region breakout of measured signal line, packet
It includes:
In the current region of measured signal line, judge whether current region meets: the line width is the first line width and institute
State line-spacing be First Line away from；
If so, determining current region for the region breakout of measured signal line.
Optionally, the line width and line-spacing according to measured signal line, determines the region breakout of measured signal line, also
Include:
If the current region of measured signal line is unsatisfactory for: the line width is the first line width and the line-spacing is First Line
Away from judging whether current region meets: the line width is the second line width and the line-spacing is less than the second line-spacing；
If so, determining current region for the region breakout of measured signal line.
Optionally, according to the region the normal wire length of the overall length of measured signal line and measured signal line, formula is utilized:
The region the breakout wire length=region net overall length-normal wire length, the region breakout that measured signal line is calculated are long
Degree, comprising:
According to the sum of the length at measured signal line starting point end to trace between different level between destination terminal, be calculated to
Survey the overall length of signal wire；
According to the sum of the sum of the first trace length and the 2nd trace length, formula is utilized: the region normal wire length=the
The region the normal wire length of measured signal line is calculated in the sum of-the two trace length of the sum of one trace length, wherein the
The sum of one trace length is the sum of the trace length that line width is between the different level of the second line width in measured signal line, second
The sum of trace length is that line width is the second line width in measured signal line and line-spacing is not equal between the different level of the second line-spacing
The sum of trace length；
Utilize formula: measured signal line is calculated in the region the breakout wire length=region net overall length-normal wire length
Breakout zone length.
A kind of system calculating signal wire breakout zone length, the system comprises:
Line width and line-spacing obtain module, and for obtaining the line width and line-spacing of measured signal line, the line width includes: and signal
The first line width that the region breakout of line matches and the second line width to match with the region normal of signal wire, it is described
Line-spacing includes: that the First Line that matches with the region breakout of signal wire matches away from and with the region normal of signal wire
The second line-spacing；
Breakout area determination module determines measured signal line for the line width and line-spacing according to measured signal line
The region breakout；
Computing module, for calculating according to the overall length of measured signal line and the region the normal wire length of measured signal line
The breakout zone length of measured signal line out.
Optionally, the breakout area determination module includes:
First judging unit, for judging whether current region meets in the current region of measured signal line: the line
Width is the first line width and the line-spacing is First Line away from if so, determining current region for the area breakout of measured signal line
Domain.
Optionally, the breakout area determination module further include:
Second judgment unit, be unsatisfactory for for the current region when measured signal line: the line width is the first line width and institute
State line-spacing be First Line away from when, judge whether current region meets: the line width is the second line width and the line-spacing is less than second
Line-spacing, if so, determining current region for the region breakout of measured signal line.
Optionally, the computing module includes:
Signal wire overall length computing unit is used for according to measured signal line starting point end between different level between destination terminal
The overall length of measured signal line is calculated in the sum of length of trace；
The region normal wire length computing unit is used for according to the sum of the sum of the first trace length and the 2nd trace length,
Utilize formula: measured signal is calculated in the sum of-the two trace length of the sum of the region normal wire length=the first trace length
The region the normal wire length of line, wherein the sum of the first trace length is the different layers that line width is the second line width in measured signal line
The sum of trace length between face, the sum of the 2nd trace length are that line width is the second line width in measured signal line and line-spacing is not equal to
The sum of trace length between the different level of second line-spacing；
The region breakout wire length computing unit, for utilizing formula: the region breakout wire length=net overall length-
The breakout zone length of measured signal line is calculated in the region normal wire length.
The technical solution that embodiments herein provides can include the following benefits:
The application provides a kind of method for calculating signal wire breakout zone length, and this method obtains measured signal first
The line width and line-spacing of line determine the region breakout of measured signal line then according to the line width and line-spacing of measured signal line；Most
Afterwards according to the region the normal wire length of the overall length of measured signal line and measured signal line, measured signal line is calculated
Breakout zone length.The application according to the line width and line-spacing of measured signal line different zones, determines the area breakout first
The wire length in the region breakout is calculated then according to the difference of signal wire overall length and the region normal wire length in domain.By the application
The calculation method of middle breakout zone length is it is found that the application avoids in the region breakout and the friendship of the region normal line width
Line cut disconnected the step of connecting again, can be greatly improved the computational efficiency of the region breakout wire length, to improve PCB by the place of connecing
Design efficiency.Moreover, because being avoided in the application in the region breakout and the region normal line width junction line cut
It is disconnected, it is completed the tedious steps of wiring again, additionally it is possible to improve the accuracy of the region breakout wire length calculating.
The automatic Ski ll program for calculating CPU breakout zone length is write using the method in the application, then will
The Skill program is put into Ski ll menu, and the length in the region CPU breakout can be accurately measured by executing the Skill program
Degree, therefore, can greatly improve PCB design efficiency.
The application also provides a kind of system for calculating signal wire breakout zone length, which includes line width and line-spacing
Obtain module, breakout area determination module and computing module.The system passes through line width first and line-spacing obtains module and obtains
To the line width and line-spacing of measured signal line, then using breakout area determination module according to the line width and line of measured signal line
Away from the region breakout of measured signal line being determined, finally by computing module, according to the overall length of measured signal line and letter to be measured
The region the normal wire length of number line, is calculated the breakout zone length of measured signal line.The application is according to measured signal
The overall length of line and the region the normal wire length of measured signal line, measured signal line is calculated using computing module indirectly
The region breakout wire length can be avoided the operation that line cut is broken in the region breakout and the region normal line width junction,
The computational efficiency and accuracy of the region breakout wire length can be greatly improved.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
The application can be limited.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the application
Example, and together with specification it is used to explain the principle of the application.
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without creative efforts, is also possible to obtain other drawings based on these drawings.
Fig. 1 shows for a kind of process of method for calculating signal wire breakout zone length provided by the embodiment of the present application
It is intended to；
Fig. 2 is the flow diagram of step S2 in the embodiment of the present application；
Fig. 3 is the schematic diagram that the embodiment of the present application shows the breakout zone length after automatic calculate；
Fig. 4 shows for a kind of structure of system for calculating signal wire breakout zone length provided by the embodiment of the present application
It is intended to.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
The application protection all should belong in technical staff's every other embodiment obtained without making creative work
Range.
The application in order to better understand explains in detail presently filed embodiment with reference to the accompanying drawing.
Referring to Fig. 1, Fig. 1 is a kind of method for calculating signal wire breakout zone length provided by the embodiment of the present application
Flow diagram.As shown in Figure 1, it mainly includes as follows for the method for signal wire breakout zone length being calculated in the present embodiment
Step:
S1: the line width and line-spacing of measured signal line are obtained.
Wherein, line width include: the first line width to match with the region breakout of signal wire and with signal wire
The second line width that the region normal matches；Line-spacing include: the First Line that matches with the region breakout of signal wire away from
And the second line-spacing to match with the region normal of signal wire.It namely in same measured signal line, i.e. include two in net
Kind of line width: the first line width and the second line width also include two kinds of line-spacings: First Line away from the second line-spacing.
When the DDR module to server master board is designed, the line width in the region breakout in usual measured signal line,
That is the first line width is 3.5mil or 8mil；The line width in the region normal, i.e. the second line width are 4mi l or 6.5mi l.
To determine whether the breakout zone length of CPU is more than threshold value, first has to determine measured signal line, then obtain
The line width and line-spacing of measured signal line.
After getting line width and the line-spacing of measured signal line, step S2 is executed: according to the line width and line of measured signal line
Away from determining the region breakout of measured signal line.
Specifically, as can be seen from FIG. 2, step S2 is comprised the following processes:
S21: in the current region of measured signal line, judge whether current region meets: line width is the first line width and line
Away from for First Line away from.
S22: if so, determining current region for the region breakout of measured signal line.
Otherwise, it is determined that current region is not the region breakout of measured signal line.According to step S21 and S22 determine to
After surveying the region breakout of signal wire, subsequent step can be executed according to the region breakout of identified measured signal line
Suddenly, the breakout zone length of measured signal line is calculated.
To further increase the accuracy in the identified region breakout, to improve the calculating of the region breakout wire length
Accuracy, when the current region of measured signal line is unsatisfactory for: line width be the first line width and line-spacing be First Line away from when, this implementation
Step S2 is further comprising the steps of in example:
S23: judge whether current region meets: line width is the second line width and line-spacing is less than the second line-spacing.
S24: if so, determining current region for the region breakout of measured signal line.
Otherwise determine that current region is not the region breakout of measured signal line.
Since in measured signal line, some region line width of CPU outlet endpoint meets the region normal, but line-spacing is not inconsistent
The region normal is closed, and the partial region will cause the impedance disturbances between DDR signal line, therefore, more than the present embodiment passes through
The partial region is determined as the region breakout of measured signal line by step S21-S24, can be in measured signal line more
The region breakout is accurately extracted, is conducive to improve the accuracy that the region breakout wire length calculates.
According to the line width and line-spacing of measured signal line, it can either determine the region breakout of measured signal line, also can
Determine the region normal of measured signal line.Wherein it is determined that needing to meet: working as proparea when the region normal of measured signal line
Line width is the second line width in domain and line-spacing is the second line-spacing, alternatively, line width is that the second line width and line-spacing are greater than the in current region
Two line-spacings.
With continued reference to Fig. 1, it is known that, after the region breakout for determining measured signal line, execute step S3: according to be measured
The overall length of signal wire and the region the normal wire length of measured signal line, the region breakout that measured signal line is calculated are long
Degree.Formula: the region the breakout wire length=region net overall length-normal wire length is specifically utilized, measured signal line is calculated
Breakout zone length.
Specifically, step S3 is comprised the following processes again:
S31: it according to the sum of the length at measured signal line starting point end to trace between different level between destination terminal, calculates
The overall length of measured signal line out.
Trace in the present embodiment is data transfer path or track, and the length of trace is data transmission route electrical path length,
Or path length.It include multiple PCB layer faces in same measured signal line, the trace long between the adjacent PCB layer face of any two
The length or path length of the data transfer path between two adjacent PCB layer faces are spent, the overall length of whole measured signal line is
Length the sum of of the measured signal line starting point end to trace between different level between destination terminal.
S32: according to the sum of the sum of the first trace length and the 2nd trace length, formula is utilized: the region normal wire length
The region the normal wire length of measured signal line is calculated in the sum of-the two trace length of the sum of=the one trace length.
Wherein, the sum of the first trace length is the trace that line width is between the different level of the second line width in measured signal line
The sum of length, the sum of the 2nd trace length are that line width is the second line width in measured signal line and line-spacing is not equal to the second line-spacing
The sum of trace length between different level.Namely difference of the sum of the first trace length with the sum of the 2nd trace length, i.e.,
For the region the normal wire length of measured signal line.
The overall length of measured signal line is calculated according to step S31, measured signal line is calculated using step S32
After the wire length of the region normal, step S33 is executed: utilizing formula: the region the breakout wire length=region net overall length-normal
The breakout zone length of measured signal line is calculated in wire length.
In conclusion the automatic calculating region a CPU breakout wire length can be write according to the method in the application
Skill program runs the Skill program, the breakout zone length of measured signal line is calculated, automatically so as to big
The big computational efficiency for improving the region breakout wire length and calculating accuracy.
In practical application, measured signal line breakout zone length is calculated using the present processes, it can be using such as
Lower step:
1) an automatic Skill program for calculating the region CPU breakout wire length is write according to the method in the application；
2) current Skill program is run, the signal wire to be measured is selected；
3) hind computation system is according to Skill program automatic measurement CPU breakout length；
4) pop-up window, the CPU breakout length sequences information according to the title of measured signal line, after display measurement；
5) Done order, Skill the end of the program are exported.
The schematic diagram that the embodiment of the present application shows the breakout zone length after automatic calculate is as shown in Figure 3.
On the basis of Fig. 1, Fig. 2 and embodiment illustrated in fig. 3 referring to fig. 4, Fig. 4 is one provided by the embodiment of the present application
Kind calculates the structural schematic diagram of the system of signal wire breakout zone length.
As shown in Figure 4, the system for signal wire breakout zone length being calculated in the application specifically includes that line width and line-spacing
Obtain module, breakout area determination module and computing module three parts.Wherein, line width and line-spacing obtain module for obtaining
The line width and line-spacing of measured signal line, line width include: the first line width to match with the region breakout of signal wire and with
The second line width that the region normal of signal wire matches, line-spacing include: to match with the region breakout of signal wire
One line-spacing and the second line-spacing to match with the region normal of signal wire；Breakout area determination module be used for according to
The line width and line-spacing for surveying signal wire, determine the region breakout of measured signal line；Computing module is used for according to measured signal line
Overall length and measured signal line the region normal wire length, the breakout zone length of measured signal line is calculated.
Further, breakout area determination module includes the first judging unit, in the current of measured signal line
In region, judge whether current region meets: line width is the first line width and line-spacing is First Line away from if so, determining to work as proparea
Domain is the region breakout of measured signal line.Otherwise, it is determined that current region is not the region breakout of measured signal line.
Further, breakout area determination module further includes second judgment unit, and second judgment unit is used for when the
When one judging unit determines that current region is not the region breakout of measured signal line, further judge whether current region is full
Foot: line width is the second line width and line-spacing is less than the second line-spacing, if so, determining current region for the breakout of measured signal line
Region, otherwise, it is determined that current region is not the region breakout of measured signal line.
The setting of second judgment unit, can further increase and determine in the present embodiment breakout area determination module
The region breakout accuracy, thus improve the region breakout wire length calculating accuracy.
In the present embodiment computing module include: signal wire overall length computing unit, the region normal wire length computing unit and
The region breakout wire length computing unit three parts.Wherein, signal wire overall length computing unit is used for according to measured signal line starting point
The sum of the length for holding trace between different level between destination terminal, is calculated the overall length of measured signal line.The region normal line
Long computing unit is used to utilize formula: the region normal line according to the sum of the sum of the first trace length and the 2nd trace length
The sum of-the two trace length of the sum of long=the one trace length, is calculated the region the normal wire length of measured signal line；Its
In, the sum of the first trace length is the sum of the trace length that line width is between the different level of the second line width in measured signal line,
The sum of 2nd trace length is that line width is the second line width in measured signal line and line-spacing is not equal between the different level of the second line-spacing
The sum of trace length.The region breakout wire length computing unit, for utilizing formula: the region breakout wire length=net is total
The long region-normal wire length, is calculated the breakout zone length of measured signal line.
The working principle and working method that the system of signal wire breakout zone length is calculated in the application, believe calculating
It has been elaborated in the method for number line breakout zone length, details are not described herein.
The above is only the specific embodiment of the application, is made skilled artisans appreciate that or realizing this Shen
Please.Various modifications to these embodiments will be apparent to one skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the application.Therefore, the application
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (8)
1. a kind of method for calculating signal wire breakout zone length characterized by comprising
The line width and line-spacing of measured signal line are obtained, the line width includes: the to match with the region breakout of signal wire
One line width and the second line width to match with the region normal of signal wire, the line-spacing include: and signal wire
The First Line that the region breakout matches away from and with signal wire the second line-spacing for matching of the region normal；
According to the line width and line-spacing of measured signal line, the region breakout of measured signal line is determined；
According to the region the normal wire length of the overall length of measured signal line and measured signal line, measured signal line is calculated
Breakout zone length.
2. a kind of method for calculating signal wire breakout zone length according to claim 1, which is characterized in that described
According to the line width and line-spacing of measured signal line, the region breakout of measured signal line is determined, comprising:
In the current region of measured signal line, judge whether current region meets: the line width is the first line width and the line
Away from for First Line away from；
If so, determining current region for the region breakout of measured signal line.
3. a kind of method for calculating signal wire breakout zone length according to claim 2, which is characterized in that described
According to the line width and line-spacing of measured signal line, the region breakout of measured signal line is determined, further includes:
If the current region of measured signal line is unsatisfactory for: the line width is the first line width and the line-spacing is First Line away from sentencing
Whether disconnected current region meets: the line width is the second line width and the line-spacing is less than the second line-spacing；
If so, determining current region for the region breakout of measured signal line.
4. a kind of method for calculating signal wire breakout zone length according to claim 1 to 3, feature
It is, according to the region the normal wire length of the overall length of measured signal line and measured signal line, utilizes formula: the region breakout line
The region length=net overall length-normal wire length, is calculated the breakout zone length of measured signal line, comprising:
According to the sum of the length at measured signal line starting point end to trace between different level between destination terminal, letter to be measured is calculated
The overall length of number line；
According to the sum of the sum of the first trace length and the 2nd trace length, formula is utilized: the region normal wire length=the first
The region the normal wire length of measured signal line is calculated, wherein first in the sum of-the two trace length of the sum of trace length
The sum of trace length is the sum of the trace length that line width is between the different level of the second line width in measured signal line, second
The sum of trace length is that line width is the second line width in measured signal line and line-spacing is not equal between the different level of the second line-spacing
The sum of trace length；
Utilize formula: measured signal line is calculated in the region the breakout wire length=region net overall length-normal wire length
Breakout zone length.
5. a kind of system for calculating signal wire breakout zone length, which is characterized in that the system comprises:
Line width and line-spacing obtain module, and for obtaining the line width and line-spacing of measured signal line, the line width includes: and signal wire
The first line width that the region breakout matches and the second line width to match with the region normal of signal wire, the line-spacing
Include: the First Line that matches with the region breakout of signal wire away from and with signal wire the region normal match
Two line-spacings；
Breakout area determination module determines measured signal line for the line width and line-spacing according to measured signal line
The region breakout；
Computing module, for according to the overall length of measured signal line and the region the normal wire length of measured signal line, be calculated to
Survey the breakout zone length of signal wire.
6. a kind of system for calculating signal wire breakout zone length according to claim 1, which is characterized in that described
Breakout area determination module includes:
First judging unit, for judging whether current region meets in the current region of measured signal line: the line width is
First line width and the line-spacing are First Line away from if so, determining current region for the region breakout of measured signal line.
7. a kind of system for calculating signal wire breakout zone length according to claim 6, which is characterized in that described
Breakout area determination module further include:
Second judgment unit is unsatisfactory for for the current region when measured signal line: the line width is the first line width and the line
Away from for First Line away from when, judge whether current region meets: the line width is the second line width and the line-spacing is less than the second line-spacing,
If so, determining current region for the region breakout of measured signal line.
8. according to a kind of system of calculating signal wire breakout zone length any in claim 5-7, feature
It is, the computing module includes:
Signal wire overall length computing unit, for according to measured signal line starting point end to the trace between different level between destination terminal
The overall length of measured signal line is calculated in the sum of length；
The region normal wire length computing unit, for utilizing according to the sum of the sum of the first trace length and the 2nd trace length
Formula: measured signal line is calculated in the sum of-the two trace length of the sum of the region normal wire length=the first trace length
The region normal wire length, wherein the sum of the first trace length be in measured signal line line width be the second line width different level between
The sum of trace length, the sum of the 2nd trace length is that line width is the second line width and line-spacing not equal to second in measured signal line
The sum of trace length between the different level of line-spacing；
The region breakout wire length computing unit, for utilizing formula: the region the breakout wire length=area net overall length-normal
The breakout zone length of measured signal line is calculated in domain wire length.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111985180A (en) * | 2020-07-30 | 2020-11-24 | 苏州浪潮智能科技有限公司 | Impedance matching device, method, equipment and medium for PCB (printed Circuit Board) routing of solid state disk |
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| CN109271666B (en) | 2022-02-18 |
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