CN101498948A - Adjusting circuit and related adjusting method thereof - Google Patents
Adjusting circuit and related adjusting method thereof Download PDFInfo
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- CN101498948A CN101498948A CNA2008100053427A CN200810005342A CN101498948A CN 101498948 A CN101498948 A CN 101498948A CN A2008100053427 A CNA2008100053427 A CN A2008100053427A CN 200810005342 A CN200810005342 A CN 200810005342A CN 101498948 A CN101498948 A CN 101498948A
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Abstract
The invention discloses an adjusting device, which is used for adjusting a reference signal of a target circuit, and the adjusting device comprises: switch control module and impedance adjusting circuit. The switch control module includes: a fuse selectively blown according to the reference signal; and a control signal generating circuit coupled to the fuse for generating a control signal according to a blowing state of the fuse. The impedance adjusting circuit includes: the switch module is used for selectively conducting according to the control signal; and the impedance network is coupled to the switch module and used for determining the equivalent impedance of the impedance network according to the conduction state of the switch module so as to adjust the reference signal.
Description
Technical field
The present invention provide a kind of adjusting gear (trimmer device) with and correlated regulating method, refer to especially a kind of adjusting gear that utilizes switch to switch to control equiva lent impedance with and correlated regulating method.
Background technology
Because the error of processing procedure, after production of integrated circuits came out, its circuit characteristic (such as resistance, capacitance or the like) can depart from ideal value; Usefulness when aforesaid characteristic error tends to reduce the circuit running, even the mistake that can cause circuit to operate.
Yet, when chip seals survey, because the consideration of time and cost can't individually be adjusted for each element in the chip circuit; Yet, for mimic channel, focus on keeping the numerical value (such as the magnitude of voltage of some node or the like) of some reference signal in the integrated circuit, ideal value when making it can meet the script circuit design, therefore, how correctly to carry out above-mentioned adjustment operation, the ideal value when returning the script circuit design with the reference signal numerical value adjustment after will being offset has become important problem of industry.
See also Fig. 1, Fig. 1 is the synoptic diagram of known adjusting gear (trimmer) 100.Adjusting gear 100 is the reference voltage V that are used for adjusting objective circuit 110
F, and adjusting gear 100 comprises 120,130,140 and three fuses 150,160,170 of three resistance in seriess.As shown in Figure 1, the conducting state of fuse 150,160,170 can determine the equivalent resistance of resistance 120,130,140; Anticipate promptly, before fuse 150,160,170 fusing, fuse 150,160,170 can form short circuits, and ignores pairing resistance 120,130,140; And after one of them fusing of fuse 150,160,170, therefore the just conducting and set up cross-pressure in the two ends of resistance of its pairing resistance 120,130,140 just can and then adjust reference voltage V
FMagnitude of voltage.
In addition, see also Fig. 2, Fig. 2 is the synoptic diagram of known another adjusting gear 200.Adjusting gear 200 and aforesaid adjusting gear 100 are similar, and its difference is the resistance 220,230,240 and fuse the 250,260, the 270th of adjusting gear 200 inside, couples mutually in the mode of connecting respectively.Because its function mode and adjusting gear 100 are similar, all use the conduction status of fuse 250,260,270 to come total equivalent resistance of controlling resistance 220,230,240, and then adjust reference voltage V
FMagnitude of voltage; So do not give unnecessary details in this in addition.
By above-mentioned mechanism, wafer factory just can be when the chip envelope be surveyed, utilize the external test arrangements (not shown) to detect reference voltage (or other reference signal, but for example input test voltage and detect measuring current to should test voltage or the like), and select the fuse 150,160,170 of desire fusing according to the error degree of reference voltage, so that resistance 120,130,140 equivalent resistances that provided to be provided, and then reference voltage is adjusted to the ideal value of original design.
Yet aforesaid adjusting gear 100,200 has some shortcomings.At first and since sometimes fuse failure and imperfect, and these not fully fusing fuses can have resistance value, thus, the resistance value that fuse itself is had also can influence reference voltage V jointly
FNumerical value, make the adjustment mechanism of original design accurately to operate.In addition, in aforesaid adjustment mechanism, the equivalent resistance that resistance provided can only adjust upward, and therefore, if the resistance value of objective circuit is greater than design load originally, aforesaid adjustment circuit just can't be handled; At this moment, if the yield of chip is promoted, just necessary elder generation is lower with the ratio script ideal value of the resistance value design of objective circuit when chip design, when the chip envelope is surveyed by the time, utilize the adjustment circuit that the overall impedance value is adjusted upward back correct ideal value again, yet such way must be adjusted to each chips, when promoting yield, sizable time and cost have also been spent.
Summary of the invention
Therefore one of fundamental purpose of the present invention is to provide a kind of adjusting gear and correlated regulating method, to solve the problem in the known technology.
According to one embodiment of the invention, be to disclose a kind of adjusting gear (trimmer device), be used for adjusting the reference signal of objective circuit (target circuit), this adjusting gear comprises: switch control module comprises: fuse (fuse) is used for determining according to this reference signal whether this fuse fuses; And control signal generation circuit, be coupled to this fuse, be used for fusing situation according to this fuse, produce control signal; And impedance adjustment circuit, being coupled to this objective circuit and this switch control module, this impedance adjustment circuit comprises: switch module is used for determining the conduction status of this switch module according to this control signal; And impedance network, be coupled to this switch module, be used for conduction status according to this switch module, determine the equiva lent impedance of this impedance network, to adjust this reference signal.
According to one embodiment of the invention, also disclose a kind of method of adjustment, it is used for adjusting the reference signal of objective circuit (target circuit), and this method of adjustment comprises: switch control module is provided, and this switch control module comprises fuse (fuse) and control signal generation circuit; According to this reference signal,, utilize control signal generation circuit to produce control signal by the mode of this fuse that fuses; And according to this control signal, control is coupled to the equiva lent impedance of the impedance network of this objective circuit, to adjust this reference signal.
Adjusting gear of the present invention is to control reference signal or whole equivalent impedance by the switching of switch, controlling mechanism compared to previous employing fuse, the present invention has the elasticity in the design, and can allow up/down ground to adjust reference signal or whole equivalent impedance; Therefore, in chip design, just need not be painstakingly the resistance value of objective circuit be reduced to meet the demand of yield, thus, when the chip envelope was surveyed, adjusting gear of the present invention need only not conform in the objective circuit of ideal value resistance value (reference signal) to be adjusted, and had saved envelope and had surveyed cost and time.
Description of drawings
Fig. 1 is the synoptic diagram of known adjusting gear.
Fig. 2 is the synoptic diagram of known another adjusting gear.
Fig. 3 is the synoptic diagram of adjusting gear of the present invention.
Graphic numbering
100,200,300 adjusting gears
120,130,140,220,230,240,311,312,353,363 resistance
150,160,170,250,260,270,311,312,351,361 fuses
310 impedance adjustment circuits
320 switch control modules
313,314 transistors
350,360 switch control units
352,362 control signal generation circuit
354,364 reversers
110,210,301 destination apparatus
Embodiment
Below with reference to graphic detailed description the present invention.
See also Fig. 3, Fig. 3 is the synoptic diagram of adjusting gear 300 of the present invention.As shown in Figure 3, adjusting gear 300 comprises impedance adjustment circuit 310 and switch control module 320.Impedance adjustment circuit 310 comprises a plurality of resistance 311,312 and a plurality of transistor 313,314, its situation that couples as shown in Figure 3, so do not give unnecessary details in addition.Note that in present embodiment that at this transistor the 313, the 314th uses as switch.
And switch control module 320 is to be used for the conduction status of gauge tap 313,314, to change the equivalent resistance of resistance 311,312, therefore can and then adjust reference signal V
FNote that because adjusting gear of the present invention 300 adopts switch to come the equivalent resistance of controlling resistance 311,312 integral body therefore have better design flexibility at this; For instance, as long as the original state of suitable configuration switch 313,314, the equivalent resistance of adjusting gear 300 of the present invention not only can adjust upward (equivalent resistance increase), can also adjust (equivalent resistance decline) downwards, in other words, and reference signal V
FMagnitude of voltage also can make progress or adjust downwards; Therefore, in present embodiment, the original state of switch 313 is conducting (on) state, and the original state of switch 314 is for opening circuit (off) state, and therefore, the equivalent resistance that resistance 311,312 is provided when original state is the resistance value R1 that equals resistance 312.At this moment, if the resistance value of objective circuit 301 is lower than ideal value, then switch control module 320 just can switch to off state with the state of switch 313, and so whole equivalent resistance just becomes bigger equivalent impedance R1+R2; On the other hand, if the more satisfactory value of resistance value of objective circuit 301 is high, then switch control module 320 just can switch to conducting state with the state of switch 314, and therefore whole equivalent resistance just becomes less resistance value 0.
Note that in present embodiment that at this original state of switch 313,314 is only as one embodiment of the invention, but not restriction of the present invention.In practical application, circuit designers can be changed the original state (such as switch 313,314 is all conducting state) of switch 313,314 in response to its demand, and so corresponding variation also belongs to category of the present invention.
In order to reach above-mentioned mechanism, switch control module 320 has two switch control units 350,360, and it is coupled to switch 313,314 respectively, with the conducting state of gauge tap 313,314.
Please consult Fig. 3 once more, switch control unit 350 comprises fuse 351 and control signal generation circuit 352.Control signal generation circuit 352 comprises resistance 353, and reverser 354; Wherein fuse 351 is coupled between node A and the earth potential, and 353 of resistance are coupled between node A and the high-voltage level, and the input end of reverser 354 is coupled to node A, and its output terminal is coupled to and switch 313 (grid of transistor 313).
In present embodiment, when adjustment circuit 300 is in original state, fuse 351 is not fusing as yet, the voltage of node A is current potential (being logical value 0) accordingly, then, through behind the reverse operating of reverser 354, control signal generation circuit 352 provides the grid of high-voltage level (logical value 1) to transistor 313, so transistor 313 can conducting.
On the other hand, switch control unit 360 is similar with switch control unit 350, and it comprises fuse 361 and control signal generation circuit 362.Control signal generation circuit 362 comprises resistance 363, and reverser 364; Wherein fuse 361 is coupled between Node B and the high-voltage level, and 363 of resistance are coupled between Node B and the earth potential, and the input end of reverser 354 is coupled to Node B, and its output terminal is coupled to and switch 314 (grid of transistor 314).
In present embodiment, when adjustment circuit 300 is in original state, fuse 361 is not fusing as yet, the voltage of Node B is corresponding high voltage potential (being logical value 1), then, through behind the reverse operating of reverser 364, control signal generation circuit 362 provides the grid of low voltage level (logical value 0) to transistor 314, so transistor 314 can open circuit in formation.
So via the control of switch control module 320, as previously mentioned, when original state, the equivalent impedance that impedance adjustment circuit 310 is provided equals the resistance value R1 of resistance 312.
And when the chip envelope is surveyed, external test arrangements (not being shown among Fig. 3) can detect reference voltage VF or other reference signal (such as input test voltage and measure its corresponding output current to learn the resistance value of the objective circuit 301) ideal value when whether meeting design, when if reference voltage VF is lower than original design load (when the resistance value of objective circuit 301 is lower than design load), then proving installation can be with 351 fusing of the fuse in the switch control unit 350, thus, the just corresponding high-voltage level of the voltage of node A, and just current potential accordingly of the grid of transistor 313, therefore the state of switch 313 can be switched to off state, so whole equivalent resistance just becomes bigger equivalent impedance R1+R2, and then increases reference voltage V
FMagnitude of voltage.
On the other hand, if reference voltage V
FWhen higher (when the resistance value of objective circuit 301 is higher than design load) than original design load, then proving installation can be with 361 fusing of the fuse in the switch control unit 360, thus, the voltage of Node B is current potential accordingly just, and the grid of transistor 313 just can corresponding high-voltage level, therefore the state of switch 314 can be switched to conducting state, and so whole equivalent resistance just becomes less equivalent impedance 0, and then reduces reference voltage V
FMagnitude of voltage.
Note that at this disclosed circuit framework in front only is one embodiment of the invention, but not restriction of the present invention.For example, adjust resistance value or reference signal more accurately in order to provide, the present invention adjusts circuit can have more resistance, and corresponding more switches control module, and has more complicated connected mode (such as connection in series-parallel or the like), because its circuit variation is too numerous to enumerate, those skilled in the art should carry out corresponding variation, so do not give unnecessary details in addition.Framework with known adjusting gear 100,200 is an example, the present invention also can change each fuse in the adjusting gear 100,200 into switch, and the switch control module of increase controllable switch, with the equivalent resistance that utilizes the switch controlling resistance to provide, and then reach the purpose of adjusting reference signal, so corresponding variation also belongs to category of the present invention.
Please notice that in addition in switch control unit 350,360, flip-flop the 354, the 364th is as the usefulness of level adjustment (level shifting) at this; In other words, when not fusing fully of fuse 351,361, the magnitude of voltage that causes node A, B is not when being the high-voltage level/earth potential an of the best, this moment, flip-flop 354,364 just can be with these more sordid level, be converted to preferable voltage level via reverse running, with the state of change-over switch 313,314 correctly.
Yet flip-flop 354,364 also can be the device of selectivity (optional); For instance, if fuse 351,361 can normally fuse (that is can positively the voltage level of node A, B be drawn high/drag down after fuse 351,361 fusing), or the voltage level of node A, B has been enough to drive the switching of each switch 313,314, among switch control unit 350,360, also can only have resistance 353,363 and fuse 351,361 so; Disclose so far, those skilled in the art should understand, so do not give unnecessary details in addition.
Compared to known technology, adjusting gear of the present invention is to control reference signal or whole equivalent impedance by the switching of switch, controlling mechanism compared to previous employing fuse, the present invention has the elasticity in the design, and can allow up/down ground to adjust reference signal or whole equivalent impedance; Therefore, in chip design, just need not be painstakingly the resistance value of objective circuit be reduced to meet the demand of yield, thus, when the chip envelope was surveyed, adjusting gear of the present invention need only not conform in the objective circuit of ideal value resistance value (reference signal) to be adjusted, and had saved envelope and had surveyed cost and time.
Though more than with embodiment the present invention is described, therefore do not limit scope of the present invention, only otherwise break away from main idea of the present invention, those skilled in the art can carry out various distortion or change.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100053427A CN101498948A (en) | 2008-02-01 | 2008-02-01 | Adjusting circuit and related adjusting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100053427A CN101498948A (en) | 2008-02-01 | 2008-02-01 | Adjusting circuit and related adjusting method thereof |
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| Publication Number | Publication Date |
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| CN101498948A true CN101498948A (en) | 2009-08-05 |
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| CNA2008100053427A Pending CN101498948A (en) | 2008-02-01 | 2008-02-01 | Adjusting circuit and related adjusting method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102163964A (en) * | 2010-02-23 | 2011-08-24 | 瑞昱半导体股份有限公司 | Impedance correction device and method thereof |
| CN102163604A (en) * | 2010-02-23 | 2011-08-24 | 上海贝岭股份有限公司 | Resistance correction circuit |
| CN106297891A (en) * | 2016-09-07 | 2017-01-04 | 英特格灵芯片(天津)有限公司 | The detection method of a kind of fuse memory device and device |
| CN107660013A (en) * | 2016-07-26 | 2018-02-02 | 上海莱托思电子科技有限公司 | A kind of LED both ends constant-current driven chip and constant current driving method |
| CN111752326A (en) * | 2019-03-28 | 2020-10-09 | 拉碧斯半导体株式会社 | Semiconductor device with a plurality of semiconductor chips |
| CN115407819A (en) * | 2022-09-28 | 2022-11-29 | 上海积塔半导体有限公司 | Voltage regulating circuit, operation method thereof and chip |
-
2008
- 2008-02-01 CN CNA2008100053427A patent/CN101498948A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102163964A (en) * | 2010-02-23 | 2011-08-24 | 瑞昱半导体股份有限公司 | Impedance correction device and method thereof |
| CN102163604A (en) * | 2010-02-23 | 2011-08-24 | 上海贝岭股份有限公司 | Resistance correction circuit |
| CN102163964B (en) * | 2010-02-23 | 2014-01-01 | 瑞昱半导体股份有限公司 | Impedance correction device and method thereof |
| CN107660013A (en) * | 2016-07-26 | 2018-02-02 | 上海莱托思电子科技有限公司 | A kind of LED both ends constant-current driven chip and constant current driving method |
| CN107660013B (en) * | 2016-07-26 | 2024-04-05 | 上海莱托思电子科技有限公司 | LED two-end constant-current driving chip and constant-current driving method |
| CN106297891A (en) * | 2016-09-07 | 2017-01-04 | 英特格灵芯片(天津)有限公司 | The detection method of a kind of fuse memory device and device |
| CN106297891B (en) * | 2016-09-07 | 2023-08-08 | 四川易冲科技有限公司 | Method and device for detecting fuse memory device |
| CN111752326A (en) * | 2019-03-28 | 2020-10-09 | 拉碧斯半导体株式会社 | Semiconductor device with a plurality of semiconductor chips |
| CN115407819A (en) * | 2022-09-28 | 2022-11-29 | 上海积塔半导体有限公司 | Voltage regulating circuit, operation method thereof and chip |
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Open date: 20090805 |