CN106535470B - A kind of PCB layout method, line width determining device and PCB based on SMA interfaces - Google Patents
A kind of PCB layout method, line width determining device and PCB based on SMA interfaces Download PDFInfo
- Publication number
- CN106535470B CN106535470B CN201611219287.2A CN201611219287A CN106535470B CN 106535470 B CN106535470 B CN 106535470B CN 201611219287 A CN201611219287 A CN 201611219287A CN 106535470 B CN106535470 B CN 106535470B
- Authority
- CN
- China
- Prior art keywords
- width
- coupling part
- trace width
- impedance
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000008878 coupling Effects 0.000 claims abstract description 131
- 238000010168 coupling process Methods 0.000 claims abstract description 131
- 238000005859 coupling reaction Methods 0.000 claims abstract description 131
- 230000000869 mutational effect Effects 0.000 claims abstract description 36
- 230000035772 mutation Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims 1
- 235000011613 Pinus brutia Nutrition 0.000 claims 1
- 241000018646 Pinus brutia Species 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 13
- 230000008859 change Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- 238000012857 repacking Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- 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
Abstract
PCB layout method, line width determining device and PCB, the method that the present invention provides a kind of based on SMA interfaces include：Mutational range is set；Differential signal cabling includes loose coupling part and close coupling part；Further include：Determine corresponding first trace width in close coupling part；Corresponding first impedance value in close coupling part is determined according to first trace width；According to first trace width and first impedance value, corresponding second trace width in loose coupling part is determined, so that the absolute value of difference is located in the mutational range between corresponding second impedance value in loose coupling part and first impedance value；According to first trace width and second trace width, corresponding differential signal cabling is arranged on PCB.This programme may be implemented to optimize measurement signal quality.
Description
Technical field
The present invention relates to printed circuit board technology field, more particularly to a kind of PCB (Printed based on SMA interfaces
Circuit Board, printed circuit board) wiring method, line width determining device and PCB.
Background technology
It is getting faster with the development of server technology, demand of the client to server capability is also higher and higher.At some
It when server product is developed, needs to be connected with differential signal cabling using SMA interfaces one end, the other end connects with other components
It connects, to realize the connection of differential signal cabling and other components.However, since SMA connection sizes are larger, the cloth on pcb board
When setting differential signal cabling, SMA interfaces are interconnected with two trends in differential signal cabling, can not be coupled away in the presence of one section
Line region, referring to FIG. 1, for PCB schematic diagrames in the prior art, in Fig. 1, when differential signal cabling is connect with SMA interfaces, two
The direction of cabling differs 180 degree.In this case, when to PCB realization re-pack verification when, the impedance of SMA interface output ends
Mutation amplitude can be larger, to influence to measure signal quality.
Invention content
An embodiment of the present invention provides a kind of PCB layout method, line width determining device and PCB based on SMA interfaces, with right
Measurement signal quality optimizes.
In a first aspect, an embodiment of the present invention provides a kind of PCB layout method based on SMA interfaces, mutational range is set；
Differential signal cabling includes loose coupling part and close coupling part；Further include：
Determine corresponding first trace width in close coupling part；
Corresponding first impedance value in close coupling part is determined according to first trace width；
According to first trace width and first impedance value, determine that line width is walked in loose coupling part corresponding second
Degree, so that the absolute value of difference is located at the mutation model between corresponding second impedance value in loose coupling part and first impedance value
In enclosing；
According to first trace width and second trace width, corresponding differential signal cabling is arranged in PCB
On.
Preferably,
It is described that corresponding first impedance value in close coupling part is determined according to first trace width, including：Described in determination
Differential signal cabling close coupling part the first spacing and determine the underlying parameter of pcb board, by first spacing, described
Underlying parameter and first trace width are input in impedance simulation software, to calculate corresponding first resistance in close coupling part
Anti- value；
It is described according to first trace width and first impedance value, determine corresponding second cabling in loose coupling part
Width, including：Determine the differential signal cabling loose coupling part the second spacing, and by second spacing and the base
Plinth parameter is input in the impedance simulation software, and it is soft according to first trace width adjustment to be input to impedance emulation
Trace width value in part so that between calculated second impedance value of the impedance simulation software and the first impedance value difference it is exhausted
Value is located in the mutational range, the absolute value for meeting difference between the second impedance value and the first impedance value is located at the mutation
Trace width value in range is determined as second trace width.
Preferably, the underlying parameter includes at least one of parameters described below：Spacing between routing layer and GND layers,
Line width under line width, cabling in the DK index values of pcb board material, cabling, the height of pcb board, green oil thickness and green oil DK refer to
Scale value.
Preferably,
Further comprise：Width threshold value is set；
It is described that trace width value in the impedance simulation software, packet are input to according to first trace width adjustment
It includes：Increase the width threshold value one by one on the basis of first trace width, and will often increase the primary width threshold value
When corresponding current trace width be input in the impedance simulation software, until determining second trace width.
Second aspect, an embodiment of the present invention provides a kind of line width determining devices of differential signal cabling, including：
Storage unit, the mutational range for storing setting；
First determination unit, for determining corresponding first trace width in close coupling part；
Second determination unit, for determining corresponding first impedance value in close coupling part according to first trace width；
Third determination unit, for according to first trace width and first impedance value, determining loose coupling part
Corresponding second trace width so that between corresponding second impedance value in loose coupling part and first impedance value difference it is absolute
Value is located in the mutational range.
Preferably,
Second determination unit, be specifically used for determining the differential signal cabling close coupling part the first spacing with
And determine the underlying parameter of pcb board, first spacing, the underlying parameter and first trace width are input to impedance
In simulation software, to calculate corresponding first impedance value in close coupling part；
The third determination unit, the second spacing specifically for the determining differential signal cabling in loose coupling part,
And second spacing and the underlying parameter is input in the impedance simulation software, and according to first trace width
Adjustment is input to the trace width value in the impedance simulation software, so that calculated second impedance of the impedance simulation software
The absolute value of difference is located in the mutational range between value and the first impedance value, will meet between the second impedance value and the first impedance value
The trace width value that the absolute value of difference is located in the mutational range is determined as second trace width.
Preferably, the underlying parameter includes at least one of parameters described below：Spacing between routing layer and GND layers,
Line width under line width, cabling in the DK index values of pcb board material, cabling, the height of pcb board, green oil thickness and green oil DK refer to
Scale value.
Preferably,
The storage unit is further used for the width threshold value of storage setting；
The third determination unit, specifically for increasing the width threshold one by one on the basis of first trace width
Corresponding current trace width is input in the impedance simulation software when being worth, and will often increase the primary width threshold value, directly
To determining second trace width.
The third aspect, the embodiment of the present invention additionally provide a kind of PCB, including：Differential signal cabling and at least two SMA connect
Mouthful, the one end of each cabling by loose coupling partially away from close coupling part connects corresponding one in the differential signal cabling
A SMA interfaces；Wherein, the line width of the corresponding close coupling part of the differential signal cabling is the first trace width, the difference
The line width of the corresponding loose coupling part of signal lead is the second trace width, and second trace width utilizes any of the above-described described
The line width determining device of differential signal cabling determines.
An embodiment of the present invention provides a kind of PCB layout method, line width determining device and PCB based on SMA interfaces, passes through
The line width of the corresponding differential signal cabling in loose coupling part is adjusted, so that the corresponding differential signal cabling in loose coupling part
The absolute difference of the impedance value of differential signal cabling corresponding with close coupling part is located in the mutational range of setting, in this way,
The change in the instantaneous impedance amplitude of loose coupling part and close coupling part can be reduced, to be optimized to measurement signal quality.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the PCB schematic diagrames that the prior art provides；
Fig. 2 is a kind of method flow diagram provided by one embodiment of the present invention；
Fig. 3 is another method flow diagram provided by one embodiment of the present invention；
Fig. 4 is that prior art offer is corresponding impedance when loose coupling part is identical as the trace width of close coupling part
Value emulation schematic diagram；
Fig. 5 is the corresponding impedance variations curve of differential signal cabling that the prior art provides；
Fig. 6 is the measurement signal quality waveform figure that the prior art provides；
Fig. 7 is the corresponding impedance variations curve of differential signal cabling provided by one embodiment of the present invention；
Fig. 8 is measurement signal quality waveform figure provided by one embodiment of the present invention；
Fig. 9 is line width determining device structure chart provided by one embodiment of the present invention；
Figure 10 is PCB schematic diagrames provided by one embodiment of the present invention.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments, based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Embodiment one
As shown in Fig. 2, an embodiment of the present invention provides a kind of PCB layout method based on SMA interfaces, this method can wrap
Include following steps：
Step 201：Mutational range is set；Wherein, differential signal cabling includes loose coupling part and close coupling part；
Step 202：Determine corresponding first trace width in close coupling part；
Step 203：Corresponding first impedance value in close coupling part is determined according to first trace width；
Step 204：According to first trace width and first impedance value, loose coupling part corresponding second is determined
Trace width, so that described in the absolute value of difference is located between corresponding second impedance value in loose coupling part and first impedance value
In mutational range；
Step 205：According to first trace width and second trace width, by corresponding differential signal cabling cloth
It sets on PCB.
According to the above embodiment of the present invention, adjusted by the line width to the corresponding differential signal cabling in loose coupling part
It is whole, so that the difference of the impedance value of the corresponding differential signal cabling in loose coupling part differential signal cabling corresponding with close coupling part
It is worth absolute value to be located in the mutational range of setting, in this way, the change in the instantaneous impedance width of loose coupling part and close coupling part can be reduced
Degree, to be optimized to measurement signal quality.
In order to reduce the change in the instantaneous impedance amplitude of loose coupling part and close coupling part, the cabling for adjusting loose coupling part is needed
Width can determine that line width is walked in loose coupling part corresponding second by simulation software in an embodiment of the invention
Degree：It is described that corresponding first impedance value in close coupling part is determined according to first trace width, including：Determine the difference letter
Number cabling close coupling part the first spacing and determine the underlying parameter of pcb board, will first spacing, the basis ginseng
Number and first trace width are input in impedance simulation software, to calculate corresponding first impedance value in close coupling part；
It is described according to first trace width and first impedance value, determine corresponding second cabling in loose coupling part
Width, including：Determine the differential signal cabling loose coupling part the second spacing, and by second spacing and the base
Plinth parameter is input in the impedance simulation software, and it is soft according to first trace width adjustment to be input to impedance emulation
Trace width value in part so that between calculated second impedance value of the impedance simulation software and the first impedance value difference it is exhausted
Value is located in the mutational range, the absolute value for meeting difference between the second impedance value and the first impedance value is located at the mutation
Trace width value in range is determined as second trace width.
Wherein, mutational range setting is smaller, and loose coupling part and the change in the instantaneous impedance width of close coupling part are also just smaller,
The quality of measurement signal is also higher.
According to above-described embodiment, phase can be calculated by the underlying parameter and trace width of pcb board using simulation software
The corresponding impedance value of cabling is answered, in the case of quickly determining that underlying parameter is constant, meets the second impedance value and the
The absolute value of difference is located at the second trace width in the mutational range between one impedance value, improves the second trace width really
Determine efficiency.
In an embodiment of the invention, be arranged in the impedance value of the differential signal cabling on PCB not only with loose coupling, tight
Coupling and trace width it is related, it is also related with the underlying parameter of PCB, wherein the underlying parameter include in parameters described below extremely
Few one kind：Line width under line width, cabling in the DK index values of spacing, pcb board material between routing layer and GND layers, cabling,
The height of pcb board, the DK index values of green oil thickness and green oil.
In above-described embodiment, PCB its corresponding underlying parameter when re-packing then no longer changes once it is determined that getting well, then loose coupling
The impedance value for closing part and close coupling part is determined by trace width.
In an embodiment of the invention, it in order to quickly determine the second trace width, may further include：Setting is wide
Spend threshold value；
It is described that trace width value in the impedance simulation software, packet are input to according to first trace width adjustment
It includes：Increase the width threshold value one by one on the basis of first trace width, and will often increase the primary width threshold value
When corresponding current trace width be input in the impedance simulation software, until determining second trace width.
Wherein, width threshold value setting is smaller, and the second trace width determined is more accurate, but determines the second trace width
Efficiency it is lower, therefore, a median can be taken, on the basis of ensureing accuracy rate improve determine efficiency.
For example, the width threshold value is 0.2mil.If the first trace width is 5mil, can 5.2mil be first input to impedance
In simulation software, present impedance value is calculated using impedance simulation software, and determine difference between present impedance value and the first impedance value
Absolute value whether be located at the mutational range in, if not existing, continue 5.4mil being input in impedance simulation software, successively
Analogize, when determining that the absolute value of difference between present impedance value and the first impedance value is located in the mutational range, will work as
Preceding impedance value is determined as the second impedance value.
According to above-described embodiment, the second impedance value can be fast and accurately navigated to.
Embodiment two
Below by taking the first trace width is 5mil as an example, the embodiment of the present invention is further described.
As shown in figure 3, an embodiment of the present invention provides a kind of PCB layout method based on SMA interfaces, this method can wrap
Include following steps：
Step 301：Loose coupling part mutational range corresponding with close coupling part in differential signal cabling is set.
In board design, it will usually the Coupon of signal impedance and insertion loss in design, wherein Coupon refers to
The differential cabling coupon with earth point is done around pcb board, to monitor the signal quality after PCB manufacturers re-pack,
And whether confirmation signal test result is located within the scope of the electrical specifications estimated when design early period.It is estimated if test result exceeds
Electrical specifications range, require to look up questions and prospect and optimize.
PCB layout in please referring to Fig.1, if loose coupling part is identical as the trace width of close coupling part, for example, being all
5mil, then can utilize, Coupon can measure loose coupling part and the change in the instantaneous impedance amplitude of close coupling part is larger, ask
It is corresponding impedance value when loose coupling part is identical as the trace width of close coupling part, as can be seen from FIG. 4, tight coupling with reference to figure 4
It is 84.60 Europe to close the corresponding impedance value in part, and the corresponding impedance value in loose coupling part is 97.71 Europe, referring to FIG. 5, being existing
The corresponding impedance variations curve of differential signal cabling, referring to FIG. 6, be existing measurement signal quality waveform figure；By Fig. 4,
Fig. 5 and Fig. 6 is it is found that the mutation amplitude of close coupling part and loose coupling part can so make measurement signal quality not less than 3 Europe
At influence.
Therefore, it is necessary to which the mutational range of close coupling part and loose coupling part is provided, which is arranged smaller,
Mutation amplitude then can be smaller, is influenced caused by measurement signal quality also just smaller.
For example, the mutational range is 0.5 Europe.
Step 302：Differential signal cabling is determined in the first spacing of close coupling part and determines that the basis of pcb board is joined
Number.
Wherein, its difference when close coupling is with loose coupling of the spacing Trace Separation (S1) of differential signal cabling,
For example, the first spacing of close coupling part is 7mil.
Wherein, the PCB its corresponding underlying parameter when re-packing then no longer changes once it is determined that getting well, then loose coupling part
It is determined by trace width with the impedance value of close coupling part.
The underlying parameter includes at least one of parameters described below：Interval S ubstrate between routing layer and GND layers
1Height (H1), the DK index value Substrate 1Dielecttric (Er1) of pcb board material, line width Upper on cabling
The height Trace Thickness of line width Lower Trace Width (W2), pcb board under Trace Width (W2), cabling
(T1), green oil thickness Coating Above Sustrate (C1), Coating Above Trace (C2), Coating
The DK index value Coating Dielcetric (CEr) of Between Traces (C3) and green oil.
In the present embodiment, underlying parameter includes above-mentioned all parameters simultaneously, and the value of each underlying parameter is as shown in Figure 4.
Step 303：According to corresponding first trace width of underlying parameter and close coupling part, the of close coupling part is calculated
One impedance value.
Wherein, corresponding first trace width in close coupling part is 5mil.
So underlying parameter and the first trace width are input in simulation software, as can be seen from FIG. 4, close coupling part pair
The first impedance value answered is 84.60 Europe.
Step 304：Determine the differential signal cabling loose coupling part the second spacing.
Since in loose coupling part, what two cablings were moves towards difference 180 degree, then the second spacing of loose coupling part is very
Greatly, for example, being 200mil.
Step 305：According to the second spacing, the first trace width and the first impedance value, loose coupling part corresponding is determined
Two trace widths, so that the absolute value of difference is located at institute between corresponding second impedance value in loose coupling part and first impedance value
It states in mutational range.
Wherein, when determining the second trace width, manually each trace width can be attempted, tasted required
Each trace width of examination is input in simulation software, can be according to the loose coupling portion of simulation software calculating in cut-and-try process
The present impedance value divided carries out the adjustment of input trace width.
When determining the second trace width, can also be realized by computer software：Width threshold value is pre-set, and
When increasing the width threshold value one by one on the basis of first trace width, and will often increase the primary width threshold value pair
The current trace width answered is input in the impedance simulation software, until determining second trace width.
Wherein, width threshold value setting is smaller, and the second trace width determined is more accurate, but determines the second trace width
Efficiency it is lower, therefore, a median can be taken, on the basis of ensureing accuracy rate improve determine efficiency.
For example, the width threshold value is 0.2mil.If the first trace width is 5mil, can 5.2mil be first input to impedance
In simulation software, present impedance value is calculated using impedance simulation software, and determine difference between present impedance value and the first impedance value
Absolute value whether be located at the mutational range in, if not existing, continue 5.4mil being input in impedance simulation software, successively
Analogize, when determining that the absolute value of difference between present impedance value and the first impedance value is located in the mutational range, will work as
Preceding impedance value is determined as the second impedance value.Wherein, it is 84.41 Europe that can calculate the second impedance value by simulation software.
The second impedance value can fast and accurately be navigated to by being realized by way of computer software.
Step 306：According to first trace width and second trace width, by corresponding differential signal cabling cloth
It sets on PCB.
Step 307：The PCB arranged further verified, when being verified, then according to being arranged on the PCB
Differential signal cabling is produced in batches.
Referring to FIG. 7, for the corresponding impedance variations curve of differential signal cabling of the present embodiment, referring to FIG. 8, being this reality
Apply the measurement signal quality waveform figure of example.According to Fig. 7 and Fig. 8 it is found that the mutation amplitude of close coupling part and loose coupling part not
More than 0.5 Europe, and measurement signal quality is preferable.
Embodiment three
Referring to FIG. 9, the embodiment of the present invention additionally provides a kind of line width determining device of differential signal cabling, including：
Storage unit 901, the mutational range for storing setting；
First determination unit 902, for determining corresponding first trace width in close coupling part；
Second determination unit 903, for determining corresponding first impedance in close coupling part according to first trace width
Value；
Third determination unit 904, for according to first trace width and first impedance value, determining loose coupling portion
Point corresponding second trace width so that between corresponding second impedance value in loose coupling part and first impedance value difference it is exhausted
Value is located in the mutational range.
In an embodiment of the invention, second determination unit 903 is specifically used for determining the differential signal cabling
In the first spacing of close coupling part and the underlying parameter of determining pcb board, by first spacing, the underlying parameter and institute
It states the first trace width to be input in impedance simulation software, to calculate corresponding first impedance value in close coupling part；
The third determination unit 904 is specifically used for determining the differential signal cabling between the second of loose coupling part
Away from, and second spacing and the underlying parameter is input in the impedance simulation software, and according to first cabling
Width adjustment is input to the trace width value in the impedance simulation software, so that the impedance simulation software calculated second
The absolute value of difference is located in the mutational range between impedance value and the first impedance value, will meet the second impedance value and the first impedance
The trace width value that the absolute value of difference is located in the mutational range between value is determined as second trace width.
In an embodiment of the invention, the underlying parameter includes at least one of parameters described below：Routing layer and GND
Spacing, the DK index values of pcb board material between layer, line width, the height of pcb board, green oil thickness under line width, cabling on cabling
With the DK index values of green oil.
In an embodiment of the invention, the storage unit 901 is further used for the width threshold value of storage setting；
The third determination unit 904, specifically for increasing the width one by one on the basis of first trace width
Corresponding current trace width is input to the impedance simulation software when spending threshold value, and will often increase the primary width threshold value
In, until determining second trace width.
Example IV
Referring to FIG. 10, the embodiment of the present invention additionally provides a kind of PCB, including：Differential signal cabling and at least two SMA
Interface, each cabling is connected by loose coupling partially away from one end of close coupling part corresponding in the differential signal cabling
One SMA interface；Wherein, the line width of the corresponding close coupling part of the differential signal cabling is the first trace width, the difference
The line width of the corresponding loose coupling part of sub-signal cabling is the second trace width, and second trace width utilizes claim 6-
The line width determining device of any differential signal cabling determines in 9.
In conclusion following advantageous effect at least may be implemented in each embodiment of the present invention：
1, in embodiments of the present invention, it is adjusted by the line width to the corresponding differential signal cabling in loose coupling part,
So that the difference of the impedance value of the corresponding differential signal cabling in loose coupling part differential signal cabling corresponding with close coupling part
Absolute value is located in the mutational range of setting, in this way, the change in the instantaneous impedance amplitude of loose coupling part and close coupling part can be reduced,
To be optimized to measurement signal quality.
2, in embodiments of the present invention, it can be calculated by the underlying parameter and trace width of pcb board using simulation software
Go out the corresponding impedance value of corresponding cabling, in the case of quickly determining that underlying parameter is constant, meets the second impedance value
The absolute value of difference is located at the second trace width in the mutational range between the first impedance value, improves the second trace width
Determination efficiency.
3, in embodiments of the present invention, by increasing the width threshold one by one on the basis of first trace width
Corresponding current trace width is input in the impedance simulation software when being worth, and will often increase the primary width threshold value, directly
To the mode for determining second trace width, the second trace width can be quickly navigated to.
The contents such as the information exchange between each unit, implementation procedure in above-mentioned apparatus, due to implementing with the method for the present invention
Example is based on same design, and particular content can be found in the narration in the method for the present invention embodiment, and details are not described herein again.
It should be noted that herein, such as first and second etc relational terms are used merely to an entity
Or operation is distinguished with another entity or operation, is existed without necessarily requiring or implying between these entities or operation
Any actual relationship or order.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-
It is exclusive to include, so that the process, method, article or equipment including a series of elements includes not only those elements,
But also include other elements that are not explicitly listed, or further include solid by this process, method, article or equipment
Some elements.In the absence of more restrictions, the element limited by sentence " including one ", is not arranged
Except there is also other identical factors in the process, method, article or apparatus that includes the element.
One of ordinary skill in the art will appreciate that：Realize that all or part of step of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can be stored in computer-readable storage medium, the program
When being executed, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes：ROM, RAM, magnetic disc or light
In the various media that can store program code such as disk.
Finally, it should be noted that：The foregoing is merely presently preferred embodiments of the present invention, is merely to illustrate the skill of the present invention
Art scheme, is not intended to limit the scope of the present invention.Any modification for being made all within the spirits and principles of the present invention,
Equivalent replacement, improvement etc., are included within the scope of protection of the present invention.
Claims (7)
1. a kind of PCB layout method based on SMA interfaces, which is characterized in that setting mutational range；Differential signal cabling includes pine
Coupling unit and close coupling part；Further include：
Determine corresponding first trace width in close coupling part；
Corresponding first impedance value in close coupling part is determined according to first trace width；
According to first trace width and first impedance value, corresponding second trace width in loose coupling part is determined, with
The absolute value of difference between corresponding second impedance value in loose coupling part and first impedance value is set to be located in the mutational range；
According to first trace width and second trace width, corresponding differential signal cabling is arranged on PCB；
It is described that corresponding first impedance value in close coupling part is determined according to first trace width, including：Determine the difference
Signal lead is in the first spacing of close coupling part and the underlying parameter of determining pcb board, by first spacing, the basis
Parameter and first trace width are input in impedance simulation software, to calculate corresponding first impedance in close coupling part
Value；
It is described according to first trace width and first impedance value, determine that line width is walked in loose coupling part corresponding second
Degree, including：Determine the differential signal cabling loose coupling part the second spacing, and by second spacing and the basis
Parameter is input in the impedance simulation software, and is input to the impedance simulation software according to first trace width adjustment
In trace width value so that between calculated second impedance value of the impedance simulation software and the first impedance value difference it is absolute
Value is located in the mutational range, and the absolute value for meeting difference between the second impedance value and the first impedance value is located at the mutation model
Trace width value in enclosing is determined as second trace width.
2. according to the method described in claim 1, it is characterized in that, the underlying parameter includes at least one in parameters described below
Kind：Line width, pcb board under line width, cabling in the DK index values of spacing, pcb board material between routing layer and GND layers, cabling
Height, the DK index values of green oil thickness and green oil.
3. according to the method described in claim 2, it is characterized in that,
Further comprise：Width threshold value is set；
It is described that trace width value in the impedance simulation software is input to according to first trace width adjustment, including：
It is corresponded to when increasing the width threshold value on the basis of first trace width one by one, and will often increase the primary width threshold value
Current trace width be input in the impedance simulation software, until determining second trace width.
4. a kind of line width determining device of differential signal cabling, which is characterized in that including：
Storage unit, the mutational range for storing setting；
First determination unit, for determining corresponding first trace width in close coupling part；
Second determination unit, for determining corresponding first impedance value in close coupling part according to first trace width；
Third determination unit, for according to first trace width and first impedance value, determining that loose coupling part corresponds to
The second trace width so that between corresponding second impedance value in loose coupling part and first impedance value difference absolute value position
In in the mutational range；
Second determination unit is specifically used for determining the differential signal cabling in the first spacing of close coupling part and really
First spacing, the underlying parameter and first trace width are input to impedance emulation by the underlying parameter for determining pcb board
In software, to calculate corresponding first impedance value in close coupling part；
The third determination unit, the second spacing specifically for the determining differential signal cabling in loose coupling part, and will
Second spacing and the underlying parameter are input in the impedance simulation software, and are adjusted according to first trace width
The trace width value being input in the impedance simulation software so that calculated second impedance value of the impedance simulation software with
The absolute value of difference is located in the mutational range between first impedance value, will meet difference between the second impedance value and the first impedance value
The trace width value that is located in the mutational range of absolute value be determined as second trace width.
5. the line width determining device of differential signal cabling according to claim 4, which is characterized in that the underlying parameter packet
Include at least one of parameters described below：Line width in the DK index values of spacing, pcb board material between routing layer and GND layers, cabling
The DK index values of degree, line width under cabling, the height of pcb board, green oil thickness and green oil.
6. the line width determining device of differential signal cabling according to claim 5, which is characterized in that
The storage unit is further used for the width threshold value of storage setting；
The third determination unit, specifically for increasing the width threshold value one by one on the basis of first trace width,
And corresponding current trace width is input in the impedance simulation software when will often increase the primary width threshold value, until true
Make second trace width.
7. a kind of PCB, which is characterized in that including：Differential signal cabling and at least two SMA interfaces, the differential signal cabling
The one end of middle each cabling by loose coupling partially away from close coupling part connects a corresponding SMA interface；Wherein, described
The line width of the corresponding close coupling part of differential signal cabling is the first trace width, the corresponding loose coupling of the differential signal cabling
Partial line width is the second trace width, and second trace width is walked using any differential signal in claim 4-6
The line width determining device of line determines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611219287.2A CN106535470B (en) | 2016-12-26 | 2016-12-26 | A kind of PCB layout method, line width determining device and PCB based on SMA interfaces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611219287.2A CN106535470B (en) | 2016-12-26 | 2016-12-26 | A kind of PCB layout method, line width determining device and PCB based on SMA interfaces |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106535470A CN106535470A (en) | 2017-03-22 |
| CN106535470B true CN106535470B (en) | 2018-09-25 |
Family
ID=58338037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611219287.2A Active CN106535470B (en) | 2016-12-26 | 2016-12-26 | A kind of PCB layout method, line width determining device and PCB based on SMA interfaces |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106535470B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107194058A (en) * | 2017-05-19 | 2017-09-22 | 郑州云海信息技术有限公司 | One kind is segmented isometric automatic checking method and system based on differential pair on PCB |
| CN109188101A (en) * | 2018-09-25 | 2019-01-11 | 郑州云海信息技术有限公司 | Acquisition methods, system, device and the readable storage medium storing program for executing of medium electric parameter |
| CN109918330A (en) * | 2019-04-10 | 2019-06-21 | 苏州浪潮智能科技有限公司 | A kind of SATA link impedance optimum design method |
| CN110361599B (en) * | 2019-06-26 | 2021-12-07 | 深圳市广和通无线股份有限公司 | Method for impedance control |
| CN111458588B (en) * | 2020-04-17 | 2022-05-31 | 恒为科技（上海）股份有限公司 | Differential coupling line, preparation method thereof and loss test method |
| CN111770637A (en) * | 2020-07-22 | 2020-10-13 | 浪潮电子信息产业股份有限公司 | Routing method, routing device and routing equipment for pins on PCB |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1553759A (en) * | 2003-05-27 | 2004-12-08 | 建汉科技股份有限公司 | High-frequency circuit board with signal pickup pad and measuring tool thereof |
| CN203734916U (en) * | 2014-01-26 | 2014-07-23 | 深圳市兴森快捷电路科技股份有限公司 | Surface-mounted SMA connector wiring base on control edge |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004253746A (en) * | 2002-12-26 | 2004-09-09 | Kyocera Corp | Wiring board |
| JP4371065B2 (en) * | 2005-03-03 | 2009-11-25 | 日本電気株式会社 | Transmission line, communication apparatus, and wiring formation method |
| CN104039076A (en) * | 2014-06-17 | 2014-09-10 | 浪潮(北京)电子信息产业有限公司 | Wire wrapping method and system for reducing difference circuit impedance mismatch degree |
| CN105744717A (en) * | 2014-12-11 | 2016-07-06 | 中兴通讯股份有限公司 | Printed circuit board (PCB) wiring method and apparatus, and printed circuit board |
-
2016
- 2016-12-26 CN CN201611219287.2A patent/CN106535470B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1553759A (en) * | 2003-05-27 | 2004-12-08 | 建汉科技股份有限公司 | High-frequency circuit board with signal pickup pad and measuring tool thereof |
| CN203734916U (en) * | 2014-01-26 | 2014-07-23 | 深圳市兴森快捷电路科技股份有限公司 | Surface-mounted SMA connector wiring base on control edge |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106535470A (en) | 2017-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106535470B (en) | A kind of PCB layout method, line width determining device and PCB based on SMA interfaces | |
| US20080155483A1 (en) | Database-aided circuit design system and method therefor | |
| US20130317796A1 (en) | Simulating the Transmission and Simultaneous Switching Output Noise of Signals in a Computer System | |
| JP5407226B2 (en) | Signal transmission system evaluation apparatus, signal transmission system evaluation program, and signal transmission system design method | |
| CN105740487B (en) | Domain and schematic diagram consistency verification method based on Process design kit | |
| CN103487623A (en) | Serial data link measurement and simulation system | |
| JP2009230694A (en) | Design adequacy verification device, method and program regarding suppression of power source noise of electronic circuit board | |
| JP2009238130A (en) | Printed circuit board designing apparatus and printed circuit board designing method | |
| CN106604550B (en) | A kind of line impedance adjusting method and system | |
| CN105653752A (en) | Digital signal impedance match circuit designing method | |
| CN107590338A (en) | A kind of method for the mathematical modeling floated in fitting transmission line impedance | |
| US8682625B2 (en) | Methods, systems, and computer-readable media for improving accuracy of network parameter in electromagnetic simulation and modeling | |
| CN104915496A (en) | Method for wiring differential signal wires and device | |
| US10587374B2 (en) | Signal generator and frequency characteristic display method using signal generator | |
| CN105873362B (en) | One kind changing a layer Wiring method, device and IC system | |
| Resso et al. | Signal integrity characterization techniques | |
| KR20090072939A (en) | Jitter amount estimating method, method for calculating correlation between amount of simultaneously operating signal noise and jitter amount, and recording medium | |
| TW201300802A (en) | System and method for analyzing group delay of signals based on PCB | |
| JP6636968B2 (en) | Printed circuit board measurement point setting system, measurement point setting method and measurement point setting program | |
| JPH09274623A (en) | Transmission line simulation system and transmission line simulation method using the same | |
| Shlepnev | Sink or swim at 28 Gbps | |
| JP2004287738A (en) | Transmission wave form analyzing device | |
| JP6252494B2 (en) | Design support apparatus, design support method, and program | |
| CN106371957B (en) | A kind of determination method of PCIe bus, witness plate and verifying system | |
| CN113033140A (en) | Simulation method for accurately obtaining difference of dielectric constants of upper layer and lower layer of PCB (printed Circuit Board) wiring |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |