CN101206683A - Method for testing power supply node outgoing line linewidth - Google Patents
Method for testing power supply node outgoing line linewidth Download PDFInfo
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- CN101206683A CN101206683A CNA2006101692908A CN200610169290A CN101206683A CN 101206683 A CN101206683 A CN 101206683A CN A2006101692908 A CNA2006101692908 A CN A2006101692908A CN 200610169290 A CN200610169290 A CN 200610169290A CN 101206683 A CN101206683 A CN 101206683A
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- supply node
- outgoing line
- linewidth
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Abstract
The invention relates to a power node outgoing linewidth detection method which comprises the following steps: a power node current value in a circuit diagram is set in the circuit diagram, and a circuit diagram file is outputted; operating temperature of a power node after power supply starting of a printed circuit board (PCB) is set aiming at the designed power node during the process of designing the PCB; during the process of outgoing treatment of power nodes of the PCB, current values of various power nodes are obtained according to the circuit diagram file, and copper foil thickness of various layers of the PCB and the set power node operating temperature are obtained, and then outgoing linewidth of the power nodes on the PCB is obtained. Therefore, by adoption of the power node outgoing linedwidth detection method of the invention, power point linewidth can be accurately obtained without the necessity for spending plentiful manpower and time, thereby adjustment efficiency of the power node outgoing linedidth adjustment is improved and the defect of faulty adjustment of the power node outgoing linewidth by means of manual work is avoided.
Description
Technical field
The present invention relates to a kind of method for testing power supply node outgoing line linewidth, more specifically, relate in a kind of PCB of the being applied to design method for testing power supply node outgoing line linewidth that detects in order to outgoing line linewidth the power supply node that is laid in circuit board (PCB).
Background technology
Along with the development of integrated circuit densification, promote with electric design automation (ElectronicDesign Automation; EDA) design software carries out the demand of PCB layout, more provide automatic wiring method, because this self routing has characteristics such as the speed of finishing is fast, accuracy height, more can deal with market fast to the product design requirement, and the manual routing for part then can make adjustment to the cabling mode that the part does not meet design, to reach the purpose of optimization wiring.
And the design of power supply node still rests on artificial judgment, because the node (net) on the wiring diagram is identical with the parameter setting of the part pin (PIN) of some electronic component, yet, the needed electric current of each node at networking is also inequality, for example, some lifting (pull high) resistance needs the P3v3 electric current, live width 5mil can carry this P3v3 electric current, but then be required to be 400mil if be converted to the required live width of P2v5 electric current, at this moment, the live width adjustment that can carry this electric current then need adjustment person be carried out with reference to specifications (spec.), the artificial adjustment mode of this kind, often then adjust hastily according to the personal experience because of the time, so adjusted live width may be not meet the current load condition, may make the circuit board that designs according to this wiring diagram in the process of running, because of the pin of a certain electronic component because of live width deficiency can't loaded current the time, produce phenomenons such as spark, even circuit board can't be operated.
Therefore, how a kind of power supply node live width adjustment technology is proposed, with avoid the existing adjustment time long, efficient is low, artificial adjustment mistake and influence the shortcomings such as quality of PCB design, has become the difficult problem that present industry need overcome in fact.
Summary of the invention
Various shortcoming in view of above-mentioned prior art, fundamental purpose of the present invention is to provide a kind of method for testing power supply node outgoing line linewidth, detect in order to live width, to avoid width to be not enough to carry flowing through the magnitude of current of this power supply node the power supply node that is laid in circuit board.
Another purpose of the present invention is to provide a kind of method for testing power supply node outgoing line linewidth, and it is applied in the PCB design software, to promote the accuracy that the power supply node live width is adjusted, avoids manually adjusting mistake.
A further object of the present invention is to provide a kind of method for testing power supply node outgoing line linewidth, so that a kind of easy and mode of power supply node live width adjustment fast to be provided, to promote the efficient that power supply node outgoing line linewidth is adjusted.
For reaching above-mentioned and other purpose, the invention provides a kind of method for testing power supply node outgoing line linewidth.This method for testing power supply node outgoing line linewidth may further comprise the steps: set the power supply node current value in the circuit diagram in the circuit diagram design, and export a circuit diagram file; The operational temperature of this power supply node after in circuit board (PCB) design, setting PCB power supply and starting at designed power supply node; And when the power supply node of this circuit board (PCB) carried out outlet and handles, obtain the current value of each power supply node according to this circuit diagram file, and the power supply node operational temperature that obtains the copper thickness of this each aspect of PCB and set, obtain the outgoing line linewidth of the power supply node on this PCB.
Simultaneously, among the present invention, it also is included in and sets this power supply node in this PCB design is high-level step, preferentially to adjust the outgoing line linewidth of this power supply node according to obtained outgoing line linewidth, and this power supply node also is connected with at least one node (net), and the outgoing line linewidth of this power supply node is the outgoing line linewidth greater than this node, or the outgoing line linewidth of this power supply node is the outgoing line linewidth that equals this node.
Than prior art, method for testing power supply node outgoing line linewidth of the present invention, mainly be according to the priority level of the power supply node that sets on the current value of the power supply node that sets on the circuit diagram and the PCB than other nodes, the issuable system temperature of copper thickness of each layer and PCB running back calculates the live width that is enough to carry the power supply node electric current on this PCB, and with automated manner provide line width information for the designer with reference to or adjust two kinds of adjustment modes automatically, and then need not spended time and manpower carries out adjustment work according to specifications, and be owing to consider the pass that is connected of this power supply node and other nodes, the parameters such as copper thickness of system temperature and each layer, so existing adjust with the judgement of artificial experience more accurate, adopt manual type to carry out live width to adjust caused live width and can't carry the electric current of flowing through thereby can avoid existing, and influence the shortcoming of whole PCB quality of design.
Description of drawings
Fig. 1 is in order to show the basic system architecture block schematic diagram of running method for testing power supply node outgoing line linewidth of the present invention; And
Fig. 2 is in order to show the schematic flow sheet of method for testing power supply node outgoing line linewidth of the present invention.
The simple declaration of component symbol
1 circuit diagram design software
10 pin attribute setting values
11 circuit diagram files
2 PCB design softwares
20 power supply node attribute stratum setting values
21 each layer of PCB copper thickness values
23 System Operation temperature range values
The report of 24 DRCs
S10 to S13 step
Embodiment
Below be that those skilled in the art can understand other advantages of the present invention and effect easily by the content that this instructions disclosed by particular specific embodiment explanation embodiments of the present invention.The present invention also can be implemented or be used by other different specific embodiments, and the every details in this instructions also can be based on different viewpoints and application, carries out various modifications and change under the spirit of the present invention not deviating from.
As shown in Figure 1, in order to show system's basic framework block schematic diagram of carrying out method for testing power supply node outgoing line linewidth of the present invention.As shown in the figure, this method for testing power supply node outgoing line linewidth is applied in the wiring system of circuit board, carry out circuit diagram and printed circuit board (PCB) (hereinafter to be referred as PCB) design by this wiring system, adjusting the live width that the designed PCB that goes out goes up power supply node, existing artificial to adjust live width that live width was caused not enough and can't carry the current value of being flowed through to avoid.
For carrying out method for testing power supply node outgoing line linewidth of the present invention, be to need in circuit diagram design software 1, to provide pin attribute set-up function, this pin is meant the pin of electronic component, and this pin is a power supply node, so this pin attribute is set at the power supply node attribute, and set the current value of power supply node, and store this pin attribute setting value 10 in the designed circuit diagram file 11 that goes out.
Relative, also needing provides power supply node attribute stratum set-up function in PCB design software 2, also, set this power supply node attribute and be higher than general node, and store this power supply node attribute phase setting value 20.
Because the designed PCB that goes out in running (also is, supply power to this PCB, after the electronic component that makes on it to be connected up obtains electricity, then can start its running) time, can increase and decrease system temperature because of running time length, also promptly, the running time, long more then temperature was high more, and the system temperature height also can change the size of current that power supply node is flowed through, this is when temperature raises, cause the live width of power supply node outgoing to broaden because of heat rises, and make the line resistive little, and then make electrorheological big.Hence one can see that, and the change of system temperature also can influence the live width of power supply node outgoing, thus also need in PCB design software 2, to provide System Operation temperature range set-up function, and store the System Operation temperature range value 23 that sets in the designed PCB file that goes out.
Moreover, when PCB layout, power supply node is also inequality with the condition of the outgoing line linewidth of general node, the required outgoing line linewidth of this power supply node must come widely than the outgoing line linewidth of general node, to avoid is that the power supply node in power supply source causes the problem that can't carry the electric current flashing phenomenon of being flowed through because of outgoing line linewidth is narrow, or the problem damaged because of pyrophoric behavio(u)r of the electronic component of avoiding providing this power supply node, yet, existing for the power supply node outgoing mode, directly power supply node directly is connected with general node, so that it is the same that the live width that connects both tends to, at this moment, must adjust this power supply node outgoing line linewidth by artificial, otherwise can't avoid above-mentioned problem.Therefore, for carrying out method for testing power supply node outgoing line linewidth of the present invention, then need consider all copper thicknesses of the designed PCB that goes out, that is to say, need the circuit sectional area that transmits electric current is calculated, also promptly this obtained live width of a certain cross section of this circuit multiply by line thickness, can meet the outgoing line linewidth that this power supply node or general node transmit for the electric current of flowing through to obtain.Hence one can see that, and copper thickness also can influence the live width of power supply node outgoing, thus also need in PCB design software 2, to provide each layer of PCB copper thickness read functions, and store each layer of PCB copper thickness value 21 of being read in the designed PCB file that goes out.
According to aforementioned obtained outgoing line linewidth, when receiving the designed power supply node of designer at the PCB design software, judge promptly whether the designed power supply node outgoing line linewidth that goes out meets aforementioned obtained outgoing line linewidth condition, the for example designed outgoing line linewidth that goes out must be more than or equal to obtained outgoing line linewidth, if do not meet the live width condition, then point out the designer narrow about the designed power supply node outgoing line linewidth that goes out in the dialog box mode, so, then can make the designer obtain the information whether live width meets quickly and easily.
Moreover, provide outside the information divided by the dialog box mode, also have in the PCB design and finish or a certain design phase is exported a DRC (Design Rules Check; DRC) report also can be found out the against regulation power supply node of generation live width by this DRC report 24.
As shown in Figure 2 in order to show the schematic flow sheet of method for testing power supply node outgoing line linewidth of the present invention.As shown in the figure, in step S10, when circuit diagram designs, set the current value and the priority of power supply node, this current value is meant the current value that this power supply node provides, and this priority is meant that the attribute of this power supply node is higher than general node, also is, the live width adjustment is paid the utmost attention to power supply node, then proceeds to step S11.
In step S11, when board design, read the power supply node that sets on this circuit board (PCB) by this PCB design software 2, to obtain the pin attribute setting value 10 that in this circuit diagram, sets according to this power supply node, thereby obtain the current value of the designed power supply node of this circuit board (PCB) by this pin attribute setting value 10, and find out the copper thickness of each level of this circuit board (PCB) and system temperature scope to calculate the required live width of each layer, then proceed to step S12.
In step S12, by this PCB design software 2 according to the required live width of each layer that is calculated, export the information relevant with the outgoing line linewidth of this power supply node, the mode of exporting this information is for example pointed out in the dialog box mode or is provided with the DRC report, then proceeds to step S13.
In step S13, carry out the adjustment work of power supply node outgoing line linewidth by this PCB design software 2 according to the line width information of being exported, wherein, this adjustment work needs in addition in the lump relevant for the power supply node attribute stratum setting value that is prestored, carrying out the adjustment work of live width, and can finish method for testing power supply node outgoing line linewidth of the present invention by the high power supply node of priority level.
The described adjustment work of above-mentioned steps S13 is to be adjusted automatically by the PCB design software, perhaps provide the power supply node of adjusting about the need live width in the dialog box mode, optionally to carry out live width adjustment work according to the information that this dialog box was provided by the designer by the PCB design software.Therefore, method for testing power supply node outgoing line linewidth of the present invention not for another example existing power supply node live width adjustment work need to judge by artificial reference specifications (Spec.) and according to the personal experience, so can be fast and correctly finish the adjustment work of power supply node outgoing line linewidth.
Than prior art, method for testing power supply node outgoing line linewidth of the present invention, mainly be according to the priority level of the power supply node that sets on the current value of the power supply node that sets on the circuit diagram and the PCB than other nodes, the issuable system temperature of copper thickness of each layer and PCB running back calculates the live width that is enough to carry the power supply node electric current on this PCB, and with automated manner provide line width information for the designer with reference to or adjust two kinds of adjustment modes automatically, and then need not spended time and manpower is looked for power to specifications, and be owing to consider the pass that is connected of this power supply node and other nodes, the parameters such as copper thickness of system temperature and each layer, so existing adjust with the judgement of artificial experience more accurate, adopt manual type to carry out live width to adjust caused live width and can't carry the electric current of flowing through thereby can avoid existing, and influence the shortcoming of whole PCB quality of design.
The foregoing description only is illustrative principle of the present invention and effect thereof, but not is used to limit the present invention.Any those skilled in the art all can be under spirit of the present invention and category, and the foregoing description is modified and changed.Therefore, the scope of the present invention should be listed as claim.
Claims (9)
1. method for testing power supply node outgoing line linewidth, it may further comprise the steps:
In the circuit diagram design, set the power supply node current value in the circuit diagram, and export a circuit diagram file;
The operational temperature of this power supply node after in board design, setting PCB power supply and start at designed power supply node; And
When the power supply node of this circuit board is carried out outlet and handles, obtain the current value of each power supply node according to this circuit diagram file, and the power supply node operational temperature that obtains the copper thickness of this each aspect of PCB and set, obtain the outgoing line linewidth of the power supply node on this PCB.
2. method for testing power supply node outgoing line linewidth according to claim 1, it also is included in and sets this power supply node in this PCB design is high-level step, preferentially to adjust the outgoing line linewidth of this power supply node according to obtained outgoing line linewidth.
3. method for testing power supply node outgoing line linewidth according to claim 1 and 2, wherein, this power supply node also is connected with at least one node, and the outgoing line linewidth of this power supply node is greater than the outgoing line linewidth of this node.
4. method for testing power supply node outgoing line linewidth according to claim 1 and 2, wherein, this power supply node also is connected with at least one node, and the outgoing line linewidth of this power supply node equals the outgoing line linewidth of this node.
5. method for testing power supply node outgoing line linewidth according to claim 1, wherein, this power supply node is meant the pin of the electronic component on the designed PCB.
6. method for testing power supply node outgoing line linewidth according to claim 1, wherein, the outgoing line linewidth of the power supply node that this is obtained comprises the current value of this live width of flowing through in addition.
7. method for testing power supply node outgoing line linewidth according to claim 1 wherein, if when the live width of the designed power supply node that goes out does not conform to the live width of obtained power supply node, is then exported DRC report.
8. method for testing power supply node outgoing line linewidth according to claim 1, wherein, when if the condition of the live width of the live width of the designed power supply node that goes out and obtained power supply node is not inconsistent, point out about the designed power supply node outgoing line linewidth that goes out ineligible in the dialog box mode.
9. method for testing power supply node outgoing line linewidth according to claim 8, wherein, this condition does not meet the outgoing line linewidth that is meant the designed power supply node that the goes out outgoing line linewidth less than obtained power supply node.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101692908A CN101206683A (en) | 2006-12-21 | 2006-12-21 | Method for testing power supply node outgoing line linewidth |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101692908A CN101206683A (en) | 2006-12-21 | 2006-12-21 | Method for testing power supply node outgoing line linewidth |
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| CN101206683A true CN101206683A (en) | 2008-06-25 |
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| CNA2006101692908A Pending CN101206683A (en) | 2006-12-21 | 2006-12-21 | Method for testing power supply node outgoing line linewidth |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104731988A (en) * | 2013-12-18 | 2015-06-24 | 北京华大九天软件有限公司 | Method for checking schematic diagram logic in real time |
| CN108170958A (en) * | 2017-12-28 | 2018-06-15 | 华南理工大学 | The determining method, apparatus and computer equipment of the current capacity of PCB |
-
2006
- 2006-12-21 CN CNA2006101692908A patent/CN101206683A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104731988A (en) * | 2013-12-18 | 2015-06-24 | 北京华大九天软件有限公司 | Method for checking schematic diagram logic in real time |
| CN108170958A (en) * | 2017-12-28 | 2018-06-15 | 华南理工大学 | The determining method, apparatus and computer equipment of the current capacity of PCB |
| WO2019128173A1 (en) * | 2017-12-28 | 2019-07-04 | 广州兴森快捷电路科技有限公司 | Method for determining current-carrying capability of pcb, apparatus and computer device |
| CN108170958B (en) * | 2017-12-28 | 2020-04-10 | 华南理工大学 | Method and device for determining current carrying capacity of PCB and computer equipment |
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Open date: 20080625 |