CN102497731A - Signal line compensation method and apparatus thereof - Google Patents
Signal line compensation method and apparatus thereof Download PDFInfo
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- CN102497731A CN102497731A CN2011104563914A CN201110456391A CN102497731A CN 102497731 A CN102497731 A CN 102497731A CN 2011104563914 A CN2011104563914 A CN 2011104563914A CN 201110456391 A CN201110456391 A CN 201110456391A CN 102497731 A CN102497731 A CN 102497731A
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Abstract
The invention discloses a signal line compensation method and an apparatus thereof. The method comprises the following steps that: a difference between a length of extension of a first signal line and a length of extension of a second signal line is determined; and according to the determined signal line length difference, signal line compensation is carried out preferentially at a position where the first signal line is not synchronized with the second signal line; and/or signal line compensation is carried out on a position that approaches a connector or a chip, wherein the connector or the chip is connected with the signal line pair. According to the invention, optimization is carried out by compensation on signal lines. Compensation is preferentially carried out on a position where signals are not synchronized; or signal line compensation can be preferentially carried out as soon as possible at a position when there is a connector. And it can be determined how to select a compensation mode particularly according to space of a wiring area, so that signal compensation can be realized in a real sense.
Description
Technical field
The present invention relates to circuit design field, and especially, relate to a kind of holding wire compensation method and device.
Background technology
The fast development of electronics industry, this speech of high speed has become a kind of popular in the IT industry, and the speed of electronic product also rises to G from M.At present, had the exchange velocity of portioned product to reach 20G, this has proposed bigger challenge with regard to the design of giving product, thereby crucial effects has also been played in this part design of PCB layout (Layout).In the high speed circuit design, the integrality of signal is to consider, in order to guarantee the complete of signal, the mode that adopts holding wire to compensate through regular meeting, i.e. impedance matching.Whether impedance matching is related to the quality of signals poor quality; If do not cause impedance operator discontinuous because source end, the terminating impedance of signal match; Will inevitably produce overshoot, bell signal degradation phenomena, be prone to cause the erroneous judgement of signal, may cause internal storage access deviation to occur; System entails is made mistakes, and influences system stability.In order to guarantee signal integrity, can adopt multiple mode; Compensation way, difference like CATB " electrical delay " effect adopt terminal coupling, clock to adopt source end coupling or the like.The measure of taking when these all are modular design; Even above-mentioned design point is accomplished; But reality can not reach the theoretical value requirement fully when PCB designs, difference is isometric, the notion of equidistance thereby just drawn, and has also drawn the notion of serpentine simultaneously; In order to satisfy these requirements, various compensation ways arise at the historic moment.With the differential signal line is example; So-called differential lines; Be exactly the signal that drive end sends two equivalences, anti-phase, it still is " 1 " that receiving terminal comes decision logic state " 0 " through the difference that compares these two voltages, and that a pair of cabling of carrying differential signal just is called the difference cabling; The signal of most critical all is to adopt the differential configuration design basically in the circuit at present, and traditional HW High Way compensation way mainly adopts mode following:
One, connector pin foot compensation, as shown in Figure 1, wherein, arrow position pointed is exactly the zone that compensates among Fig. 1.Because the difference cabling will be followed " isometric, equidistance " in principle, and will guarantee that at first the difference cabling is isometric, guarantee that signal keeps opposite polarity constantly, reduce common mode component, and then guarantee equidistance, keep impedance consistent, reduce reflection.Though present this way can reach requirement in theory; But may cause delay of signals to high speed signal; Reason is following: above-mentioned way can cause signal can't reach synchronously, and place itself does not have length difference at connector pin pin, has just produced difference in the corner of cabling; The result of compensation makes signal asynchronous always once coming out from the pin pin on the contrary, possibly just reach synchronous up to far place; And connector pin pin density causes same holding wire distance too near than conference, causes interference.
Two, holding wire uses the mode of serpentine to compensate at any place, and as shown in Figure 2, wherein, arrow position pointed is exactly the zone (position) that compensates among Fig. 2.Serpentine mainly is used in the high speed circuit design.Because the high speed circuit design demand is considered signal integrity, data wire needs isometric, and still, the regulation that the use of serpentine generally is not strict needs only bulge to isometric, and the size of bulge does not explicitly call for yet.Like this, though serpentine has satisfied the system sequence designing requirement, serpentine also can reduce signal quality except the purpose of sequential coupling; And, can cause the asynchronous of signal equally in any place bulge.
Though above dual mode more generally uses, along with rate request is increasingly high, these compensation can not be satisfied the signal integrity sexual demand fully, and therefore, new compensation way also just arises at the historic moment, and concrete mode is following:
(1) CATB " electrical delay " effect compensating; Be a kind ofly on circuit board, directly to cover copper and form the mode of electric capacity; Be Copper TAB and Compensation TAB, the former is the viewpoint definition from physical aspect, and the latter is the viewpoint definition from electric effect; Combine both more fully to understand CATB, have the effect of the impedance noncontinuity of compensating signal cabling.
(2) the terminal string lump is joined; Be to be lower than under the condition of transmission line characteristic impedance in the signal source terminal impedance; Resistance R of serial connection is complementary the output impedance of source end and the characteristic impedance of transmission line between the source of signal end and transmission line, and secondary reflection again takes place the signal that suppresses to reflect from load end.What much adopt all is the series connection coupling of source end.
(3) connector pin foot compensation, this is a kind of mode of when rate request is not high, generally using, be to bend at connector pin pin, thereby it is consistent to reach holding wire length.
(4) holding wire uses the mode of serpentine to compensate at any place, under the situation of not considering source end, terminal, more not will consider the synchronism of Signal Matching, and through bulge on than the short signal line, thereby it is consistent to reach holding wire length.
(5) compensation is done at connector pin pin two ends respectively, according to the requirement of connector pin pin matching length, does compensation respectively at two terminal adapter pin foots, finally reaches the signal length unanimity with the form of bulge.
(6) signal lead occurs doing near not isometric isometric, if connector pin foot coupling does not require, just because the length that signal lead causes is inconsistent, does isometricly just now not isometric ground occurring, reaches the signal length unanimity with the form of bulge.
But, reached the isometric of two differential lines on the present compensation way surface, but can not when truly guaranteeing differential signal transmission, keep constantly to this, not proposing effective solution at present as yet synchronously.
Summary of the invention
To the problem that can't truly realize the compensation that holding wire is right in the correlation technique; The present invention proposes a kind of holding wire compensation method and device; Can the compensation of holding wire be optimized; Thereby make in the elongated area of holding wire and avoid asynchronous as much as possible, realize signal compensation truly.
Technical scheme of the present invention is achieved in that
According to an aspect of the present invention, a kind of holding wire compensation method is provided, the holding wire that is used for first holding wire and the secondary signal line of existence contact are each other formed is to compensating.
This method comprises: confirm the difference in length that first holding wire and secondary signal line extend; According to the holding wire length difference of confirming, preferentially nonsynchronous position occurs and carry out the holding wire compensation, and/or at the approach signal line connector that connected or chip place are carried out holding wire and compensate at first holding wire and secondary signal line.
Particularly; Nonsynchronous position occurring at first holding wire and secondary signal line carries out the holding wire compensation and comprises: in the zone of first holding wire and the extension of secondary signal line; Confirm that the position of difference in length and the holding wire of needs compensation appear in first holding wire and secondary signal line, and the holding wire of needs compensation is compensated in the position of confirming.
In addition, holding wire is compensated comprise: the holding wire to the needs compensation carries out the holding wire compensation through the mode of serpentine.
Wherein, When the holding wire to the needs compensation carries out the holding wire compensation through the mode of serpentine; This method further comprises: the degree of crook of the holding wire of control compensation makes the holding wire and the ultimate range between another holding wire of compensation satisfy holding wire to required distance coupled to each other.
In addition, the holding wire of compensation has a plurality of bending parts, and the shape of a plurality of bending parts is consistent each other.
According to a further aspect in the invention, a kind of holding wire compensation arrangement is provided also, the holding wire that is used for first holding wire and the secondary signal line of existence contact are each other formed is to compensating.
This device comprises: determination module is used for the difference in length of confirming that first holding wire and secondary signal line extend; Compensating module is used for according to the difference in length of confirming, preferentially nonsynchronous position occurs at first holding wire and secondary signal line and carries out the holding wire compensation, and/or at the approach signal line connector that connected or chip place are carried out holding wire and compensate.
Wherein, determination module also is used in the zone of first holding wire and the extension of secondary signal line, confirms that the position of difference in length and the holding wire of needs compensation appear in first holding wire and secondary signal line; And compensating module also is used in the position of confirming the holding wire of needs compensation being compensated.
And compensating module is used for carrying out the holding wire compensation through the mode of serpentine.
In addition; When the holding wire to the needs compensation carries out the holding wire compensation through the mode of serpentine; Compensating module also is used for the degree of crook of the holding wire of control compensation, makes the holding wire and the ultimate range between another holding wire of compensation satisfy holding wire to required distance coupled to each other.
In addition, the holding wire of compensation has a plurality of bending parts, and compensating module also is used to control the shape of a plurality of bending parts, makes that the shape of a plurality of bending parts is consistent each other.
The present invention is optimized through the compensation to holding wire; Preferentially nonsynchronous place occurring at signal compensates; Also can preferentially carry out the holding wire compensation as early as possible once going out connector; The concrete compensation way of how selecting can be confirmed according to the space in wiring zone, thereby realize signal compensation truly.
Description of drawings
Fig. 1 is the sketch map of a kind of signal compensation scheme in the correlation technique;
Fig. 2 is the sketch map of another kind of signal compensation scheme in the correlation technique;
Fig. 3 is the flow chart according to the holding wire compensation method of the embodiment of the invention;
Fig. 4 is the principle schematic according to the holding wire compensation method of the embodiment of the invention;
Fig. 5 is the block diagram according to the holding wire compensation arrangement of the embodiment of the invention.
Embodiment
According to embodiments of the invention, a kind of holding wire compensation method is provided, the holding wire that is used for first holding wire and the secondary signal line of existence contact are each other formed is to compensating.
As shown in Figure 3, comprise according to the holding wire compensation method of the embodiment of the invention:
Step S301 confirms the difference in length that first holding wire and secondary signal line extend;
Step S303; Preferentially nonsynchronous position occurs and carry out the holding wire compensation at first holding wire and secondary signal line; And/or the connector that connected or chip place are carried out the holding wire compensation at the approach signal line; Wherein, at the approach signal line connector that connected or chip place being carried out the holding wire compensation is meant at chip or beyond the connector and avoid below connector, chip, carrying out signal compensation as far as possible.
That is to say; Occurring at first holding wire and secondary signal line that nonsynchronous position carries out holding wire compensation and carry out the holding wire compensation near the position of connector that is connected or chip is the scheme that the application's scheme is carried out the preferential employing of holding wire compensation institute; Specifically should how to select; Can confirm according to actual conditions; For example, when not enough and can't occur under the situation that nonsynchronous position compensates immediately at the wiring region domain space, the position that then can only be chosen near connector or chip compensates; And near the deficiency of the design space connector and chip, can only be employed in other and the mode that nonsynchronous position compensates occur; If wiring space allows, then can all use by two kinds of compensation schemes.
Wherein, This method may further include: in the zone of first holding wire and the extension of secondary signal line; Confirm that the position of difference in length and the holding wire of needs compensation appear in first holding wire and secondary signal line, and the holding wire of needs compensation is compensated in the position of confirming.That is to say, in scheme implementation process of the present invention, can add up, thereby carry out the holding wire compensation immediately in the nonsynchronous place of appearance to the length of holding wire.
When holding wire is compensated, can adopt multiple compensation scheme, for example, can carry out the holding wire compensation through the mode of serpentine to the holding wire of needs compensation.When the holding wire to needs compensation carried out the holding wire compensation through the mode of serpentine, the degree of crook of holding wire that can control compensation made the holding wire and the ultimate range between another holding wire of compensation satisfy holding wire to required distance coupled to each other.And the holding wire of compensation can have a plurality of bending parts, and the shape of a plurality of bending parts is consistent each other.
As shown in Figure 4, in the extension process of serpentine bend, A, B and C form a bending part, similarly; E, F and G form a bending part, and wherein, the inclination angle of A, C, E and G can be 45 degree; Wherein, the equal in length of segmentation B, D, F and H, the equal in length of A, C, E and G.
And the ultimate range between two holding wires is S1, and minimum range is S, and S1＜2S, B=D=F=H=3W (W is meant the signal live width).
In practical application, preferentially be chosen in signal and nonsynchronous place occur and do isometricly immediately, but because spatial constraints, this compensation way can not very perfectly be realized basically.The mode preferably that adopts at present is: the place that has living space, and be employed in nonsynchronous zone as far as possible and do isometricly immediately, perhaps take to do compensation at drive end as far as possible.In addition, because that connector pin pin causes is asynchronous, adopts one to go out connector and do compensation as far as possible, and in the shortest distance, reach the compensation requirement as far as possible.
Specifically when operating; For example, for the Allegro platform, the concrete operations mode is following: Allegro-delay tune occurs after the Option dialog box; Can choose the Accordion option; Afterwards spacing (Gap) is set to 16.00, and angle (Corner) is set to 45 degree, can also further mitered size (Miter size) be set to 16.00.Wherein, if distance between centers of tracks is 8, then door spacing part can fill out 16, and the spacing of serpentine S1 is controlled within the requirement with regard to relatively good like this
In addition, compensate when design preferred principle below scheme of the present invention has also proposed actual:
The all symmetrical outlet of two terminal adapters, promptly signal sheds from pin pin symmetry;
The isometric coupling of signal is not isometric according to where carries out isometric coupling with regard to the principle of where doing coupling, reaches the signal Synchronization requirement;
Two terminal adapters all begin to do signal compensation from the place nearest apart from connector.
For example,, can use the Allegro-add connect symmetry holding wire that sheds earlier, re-use Allegro-delay tune and do the isometric coupling of serpentine for the Allegro platform.
Through technique scheme of the present invention, can the global optimization cabling, make signal quality be superior to normal snakelike cabling, and can guarantee integrality, the synchronism of signal, overcome the drawback of holding wire coupling in early stage, and can improve the pcb designing quality.
It should be noted that; Although combine Allegro that scheme of the present invention is described before, more than enumerate and be not used in the scope of the present invention that limits, when carrying out the holding wire compensation through other platforms or instrument; Can adopt scheme of the present invention equally, to reach the purpose of optimization.
According to embodiments of the invention, a kind of holding wire compensation arrangement also is provided, the holding wire that is used for first holding wire and the secondary signal line of existence contact are each other formed is to compensating.
As shown in Figure 5, comprise according to the holding wire compensation arrangement of the embodiment of the invention:
Compensating module 52; Be connected to determination module 51; Be used for according to the difference in length of confirming, preferentially nonsynchronous position occur and carry out the holding wire compensation, and/or at the approach signal line connector that connected or chip place are carried out holding wire and compensate at first holding wire and secondary signal line.
Wherein, determination module 51 also is used in the zone of first holding wire and the extension of secondary signal line, confirms that the position of difference in length and the holding wire of needs compensation appear in first holding wire and secondary signal line; And compensating module 52 also is used in the position of confirming the holding wire of needs compensation being compensated.
Compensating module 52 can be used for carrying out the holding wire compensation through the mode of serpentine.And; When the holding wire to the needs compensation carries out the holding wire compensation through the mode of serpentine; Compensating module 52 also is used for the degree of crook of the holding wire of control compensation, makes the holding wire and the ultimate range between another holding wire of compensation satisfy holding wire to required distance coupled to each other.
In addition, the holding wire of compensation has a plurality of bending parts, and compensating module 52 also is used to control the shape of a plurality of bending parts, makes that the shape of a plurality of bending parts is consistent each other.
In sum, by means of technique scheme of the present invention, be optimized through compensation to holding wire; Preferentially nonsynchronous place occurring at signal compensates; Also can preferentially carry out the holding wire compensation as early as possible, specifically how select compensation way to confirm, thereby realize signal compensation truly according to the space in wiring zone once going out connector; Make signal quality better; Guarantee the integrality and the synchronism of signal, overcome the drawback of holding wire coupling in early stage, and can improve printed circuit board (PCB) (PCB) designing quality.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. holding wire compensation method, the holding wire that is used for first holding wire and the secondary signal line of existence contact are each other formed is characterized in that to compensating said method comprises:
Confirm the difference in length that said first holding wire and said secondary signal line extend;
According to the holding wire length difference of confirming, preferentially nonsynchronous position occurs and carry out the holding wire compensation, and/or connector or the chip place that is connected carried out the holding wire compensation near said holding wire at said first holding wire and said secondary signal line.
2. holding wire compensation method according to claim 1 is characterized in that, nonsynchronous position occurs at said first holding wire and said secondary signal line and carries out the holding wire compensation and comprise:
In the zone of said first holding wire and the extension of said secondary signal line; Confirm that the position of difference in length and the holding wire of needs compensation appear in said first holding wire and said secondary signal line, and the holding wire of needs compensation is compensated in the said position of confirming.
3. holding wire compensation method according to claim 1 and 2 is characterized in that, holding wire is compensated comprise:
Holding wire to the needs compensation carries out the holding wire compensation through the mode of serpentine.
4. holding wire compensation method according to claim 3 is characterized in that, when the holding wire to the needs compensation carried out the holding wire compensation through the mode of serpentine, said method further comprised:
The degree of crook of the holding wire of control compensation makes the said holding wire and the ultimate range between another holding wire of compensation satisfy holding wire to required distance coupled to each other.
5. holding wire compensation method according to claim 3 is characterized in that, the said holding wire of compensation has a plurality of bending parts, and the shape of said a plurality of bending parts is consistent each other.
6. holding wire compensation arrangement is used for holding wire to first holding wire that has contact each other and secondary signal line composition to compensating, and it is characterized in that said device comprises:
Determination module is used for the difference in length of confirming that said first holding wire and said secondary signal line extend;
Compensating module; Be used for according to the said difference in length of confirming; Preferentially nonsynchronous position occurs and carry out the holding wire compensation, and/or connector or the chip place that is connected carried out the holding wire compensation near said holding wire at said first holding wire and said secondary signal line.
7. holding wire compensation arrangement according to claim 6; It is characterized in that; Said determination module also is used in the zone of said first holding wire and the extension of said secondary signal line, confirms that the position of difference in length and the holding wire of needs compensation appear in said first holding wire and said secondary signal line;
And said compensating module also is used in the said position of confirming the holding wire of needs compensation being compensated.
8. according to claim 6 or 7 described holding wire compensation arrangements, it is characterized in that said compensating module is used for carrying out the holding wire compensation through the mode of serpentine.
9. holding wire compensation arrangement according to claim 8; It is characterized in that; When the holding wire to the needs compensation carries out the holding wire compensation through the mode of serpentine; Said compensating module also is used for the degree of crook of the holding wire of control compensation, makes the said holding wire and the ultimate range between another holding wire of compensation satisfy holding wire to required distance coupled to each other.
10. holding wire compensation arrangement according to claim 8; It is characterized in that; The said holding wire of compensation has a plurality of bending parts, and said compensating module also is used to control the shape of said a plurality of bending parts, makes that the shape of said a plurality of bending parts is consistent each other.
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| CN2011104563914A CN102497731A (en) | 2011-12-31 | 2011-12-31 | Signal line compensation method and apparatus thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105045960A (en) * | 2015-06-24 | 2015-11-11 | 浪潮电子信息产业股份有限公司 | High-speed differential signal line equal length matching design method |
| CN105188255A (en) * | 2015-08-03 | 2015-12-23 | 浪潮集团有限公司 | Non-divergence compatibility circuit design method in PCB |
| CN106845001A (en) * | 2017-02-13 | 2017-06-13 | 郑州云海信息技术有限公司 | A kind of method for designing of high speed signal differential lines compensation |
| CN107145674A (en) * | 2017-05-12 | 2017-09-08 | 郑州云海信息技术有限公司 | It is a kind of to be used to adjust the isometric method of high-speed line segmentation, realization method and system |
| CN107506325A (en) * | 2017-08-21 | 2017-12-22 | 郑州云海信息技术有限公司 | A kind of method and system for realizing that differential lines dynamic is isometric |
| CN107864561A (en) * | 2017-11-10 | 2018-03-30 | 郑州云海信息技术有限公司 | A kind of method that coiling compensates in new via through holes |
| CN109040909A (en) * | 2018-07-10 | 2018-12-18 | 合肥联宝信息技术有限公司 | Power regulating method and device, the electronic equipment of signal wire |
| CN109800450A (en) * | 2018-12-10 | 2019-05-24 | 中兴通讯股份有限公司 | A kind of implementation method, device and the equipment and main memory circuit of simplified main memory circuit |
| CN112151087A (en) * | 2019-06-28 | 2020-12-29 | 深圳市金邦科技发展有限公司 | Impedance transformation network and memory module comprising same |
| CN112397109A (en) * | 2020-11-19 | 2021-02-23 | 成都海光集成电路设计有限公司 | Time delay compensation method for memory signal line |
| CN113011123A (en) * | 2021-02-19 | 2021-06-22 | 山东英信计算机技术有限公司 | Method, system and device for compensating length of differential signal line |
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| CN102170746A (en) * | 2010-02-26 | 2011-08-31 | 鸿富锦精密工业（深圳）有限公司 | Printed circuit board and differential wire wiring method |
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Patent Citations (1)
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| CN102170746A (en) * | 2010-02-26 | 2011-08-31 | 鸿富锦精密工业（深圳）有限公司 | Printed circuit board and differential wire wiring method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105045960A (en) * | 2015-06-24 | 2015-11-11 | 浪潮电子信息产业股份有限公司 | High-speed differential signal line equal length matching design method |
| CN105188255A (en) * | 2015-08-03 | 2015-12-23 | 浪潮集团有限公司 | Non-divergence compatibility circuit design method in PCB |
| CN106845001A (en) * | 2017-02-13 | 2017-06-13 | 郑州云海信息技术有限公司 | A kind of method for designing of high speed signal differential lines compensation |
| CN106845001B (en) * | 2017-02-13 | 2020-06-16 | 苏州浪潮智能科技有限公司 | Design method for high-speed signal differential line compensation |
| CN107145674A (en) * | 2017-05-12 | 2017-09-08 | 郑州云海信息技术有限公司 | It is a kind of to be used to adjust the isometric method of high-speed line segmentation, realization method and system |
| CN107506325A (en) * | 2017-08-21 | 2017-12-22 | 郑州云海信息技术有限公司 | A kind of method and system for realizing that differential lines dynamic is isometric |
| CN107864561B (en) * | 2017-11-10 | 2020-01-31 | 苏州浪潮智能科技有限公司 | Method for compensating winding in via through holes |
| CN107864561A (en) * | 2017-11-10 | 2018-03-30 | 郑州云海信息技术有限公司 | A kind of method that coiling compensates in new via through holes |
| CN109040909A (en) * | 2018-07-10 | 2018-12-18 | 合肥联宝信息技术有限公司 | Power regulating method and device, the electronic equipment of signal wire |
| CN109800450A (en) * | 2018-12-10 | 2019-05-24 | 中兴通讯股份有限公司 | A kind of implementation method, device and the equipment and main memory circuit of simplified main memory circuit |
| CN112151087A (en) * | 2019-06-28 | 2020-12-29 | 深圳市金邦科技发展有限公司 | Impedance transformation network and memory module comprising same |
| CN112151087B (en) * | 2019-06-28 | 2023-11-24 | 深圳市金邦科技发展有限公司 | Impedance transformation network and memory module comprising same |
| CN112397109A (en) * | 2020-11-19 | 2021-02-23 | 成都海光集成电路设计有限公司 | Time delay compensation method for memory signal line |
| CN112397109B (en) * | 2020-11-19 | 2023-05-09 | 成都海光集成电路设计有限公司 | Method for compensating time delay of memory signal line |
| CN113011123A (en) * | 2021-02-19 | 2021-06-22 | 山东英信计算机技术有限公司 | Method, system and device for compensating length of differential signal line |
| CN113011123B (en) * | 2021-02-19 | 2023-02-28 | 山东英信计算机技术有限公司 | Method, system and device for compensating length of differential signal line |
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Application publication date: 20120613 |