CN102340284A - Low power voltage transconductance adjustable transconductance-constant rail-to-rail input operational amplifier - Google Patents
Low power voltage transconductance adjustable transconductance-constant rail-to-rail input operational amplifier Download PDFInfo
- Publication number
- CN102340284A CN102340284A CN2010102360200A CN201010236020A CN102340284A CN 102340284 A CN102340284 A CN 102340284A CN 2010102360200 A CN2010102360200 A CN 2010102360200A CN 201010236020 A CN201010236020 A CN 201010236020A CN 102340284 A CN102340284 A CN 102340284A
- Authority
- CN
- China
- Prior art keywords
- rail
- pmos
- nmos
- pipe
- input
- 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.)
- Granted
Links
Images
Landscapes
- Amplifiers (AREA)
Abstract
The invention relates to a low-power voltage transconductance adjustable transconductance-constant rail-to-rail input operational amplifier, which comprises a transconductance-constant control circuit, a rail-to-rail input stage and an output stage, wherein the transconductance-constant control circuit makes the transconductance of the rail-to-rail input operational amplifier approximate to twice a reciprocal of a resistance value of a reference resistor by feeding back and controlling the tail current of the rail-to-rail input stage. Simultaneously, the transconductance of the rail-to-rail input operational amplifier can be changed by changing the resistance value of the reference resistor. The rail-to-rail input operational amplifier can work under a low power voltage, and has the advantages of rail-to-rail common mode input range, transconductance adjustability, constant transconductance and the like.
Description
Technical field
The present invention relates to the operational amplifier technical field, relate in particular to a kind of rail-to-rail input operational amplifier of low supply voltage constant transconductance.
Background technology
Operational amplifier is an important module in the analog integrated circuit.Along with the high speed development of microelectronics manufacture craft technology, the characteristic size of device is more and more littler, and the supply voltage that can bear is also more and more lower, and this can limit the performance of operational amplifier, such as the common-mode input range of operational amplifier.When operational amplifier is used as buffer, need with the same big common-mode input range of input reference signal.At this moment just need to use rail-to-rail input operational amplifier to obtain big dynamic range.
Rail-to-rail input operational amplifier is a kind of amplifier of specific type, and its common-mode input voltage range is to the positive voltage rail from the negative supply voltage rail.Its input stage is imported importing forming with a pair of nmos differential by a pair of PMOS difference.When input common mode voltage near the negative supply voltage rail, the PMOS difference is imported conducting, nmos differential is imported ending; When input common mode voltage near the positive voltage rail, the PMOS difference is imported ending, nmos differential is imported conducting; In the time of in the middle of input common mode voltage is in positive voltage and negative supply voltage, the input of PMOS difference is to importing all conductings with nmos differential.The problem that rail-to-rail input operational amplifier exists is that its mutual conductance meeting has greatly changed along with the variation of input common mode voltage (in some cases, its mutual conductance changes can reach 100%), and this might make circuit vibrate.Mutual conductance feedback is one of the method that is used to realize the rail-to-rail input operational amplifier of constant transconductance at present.Existing mutual conductance feedback method all is to adopt a difference input to being used as with reference to mutual conductance; Through the nmos differential in the input stage being imported to importing duplicating the mutual conductance that obtains input stage with the PMOS difference; Through feedback the two is equated, thereby make the mutual conductance of input stage constant.But in existing circuit implementation method; Because the input of the nmos differential of input stage is to importing having different input common mode voltage (the former is rail-to-rail input common mode voltage, and the latter is a fixing input common mode voltage) with the nmos differential that duplicates, this makes the two when input common mode voltage is low; Its mutual conductance has bigger difference; Also require work under higher supply voltage simultaneously, (such as under the working power voltage of 3V, its mutual conductance fluctuation is about 3~4% otherwise can cause the interior mutual conductance of whole common-mode input range to have bigger fluctuation; And when 1V, its mutual conductance fluctuation is about 11%).
Summary of the invention
Main purpose of the present invention is to overcome the deficiency of prior art, and the rail-to-rail input operational amplifier of the adjustable constant transconductance of a kind of low supply voltage mutual conductance is provided.
In order to achieve the above object, technical scheme of the present invention is: the rail-to-rail input operational amplifier (as shown in Figure 1) of the constant transconductance that a kind of low supply voltage mutual conductance is adjustable, form by constant transconductance control circuit (1), rail-to-rail input stage (2) and output stage (3);
The Vinp input of said constant transconductance control circuit (1) links to each other with Vinn with the analog input signal Vinp of outside respectively with the Vinn input; Its V
BnOutput and V
BpOutput respectively with the V of said rail-to-rail input stage (2)
BnInput and V
BpInput links to each other;
The Vinp input of said rail-to-rail input stage (2) links to each other with Vinn with the analog input signal Vinp of outside respectively with the Vinn input; Its pOp, pOn, four outputs of nOp and nOn link to each other with I_pinp, I_pinn, four inputs of I_ninp and I_ninn of said output stage (3) respectively;
The output result of the vout output output amplifier of said output stage (3).
Among the present invention, constant transconductance control circuit (as shown in Figure 2) is by biasing circuit (1.1), and current operator circuit (1.2) and mutual conductance feedback circuit (1.3) are formed; Be used for producing output signal V
BpAnd V
Bn, control respectively in the rail-to-rail input stage (2) nmos differential input to the right tail current of PMOS difference input, make the mutual conductance of rail-to-rail input stage (2) be approximately 2 times of inverse of reference resistance resistance.Wherein:
Said biasing circuit (1.1) has 2 outputs, and being used for provides bias voltage V to the metal-oxide-semiconductor of mutual conductance feedback circuit (1.3)
B3With reference voltage DeltaV; V
B3NMOS pipe M in output and the mutual conductance feedback circuit (1.3)
18With NMOS pipe M
19Grid link to each other; PMOS pipe M in DeltaV output and the mutual conductance feedback circuit (1.3)
7With PMOS pipe M
17Grid link to each other.
Current operator circuit (1.2) has four outputs, and being used for provides bias voltage to the metal-oxide-semiconductor of mutual conductance feedback circuit (1.3); V
B4PMOS pipe M in output and the mutual conductance feedback circuit (1.3)
8Grid link to each other; V
B5NMOS pipe M in output and the mutual conductance feedback circuit (1.3)
13Grid link to each other; V
B6PMOS pipe M in output and the mutual conductance feedback circuit (1.3)
1Grid link to each other; V
B7NMOS pipe M in output and the mutual conductance feedback circuit (1.3)
2Grid link to each other; Its function is to make NMOS pipe M
13With PMOS pipe M
1Nmos differential input in the electric current that flows through and the rail-to-rail input stage (2) becomes certain proportionate relationship to the tail current that flows through, and makes NMOS pipe M
2With PMOS pipe M
8PMOS difference input in the electric current that flows through and the rail-to-rail input stage (2) becomes certain proportionate relationship to the tail current that flows through.
Mutual conductance feedback circuit (1.3) is made up of 23 metal-oxide-semiconductors and 5 current sources; PMOS manages M
1Drain electrode and current source I
1An end, NMOS manage M
2Drain electrode, NMOS manage M
3Drain and gate, NMOS manage M
5The grid concurrent; NMOS manages M
5Drain electrode and PMOS pipe M
4Drain and gate, PMOS manage M
6Grid, PMOS manage M
14The grid concurrent; PMOS manages M
6Drain electrode and PMOS pipe M
7Source electrode, PMOS manage M
11Drain and gate, NMOS manage M
9The drain and gate concurrent; PMOS manages M
14Drain electrode and PMOS pipe M
15Source electrode, PMOS manage M
12Drain and gate, NMOS manage M
10The drain and gate concurrent; PMOS manages M
8Drain electrode and PMOS pipe M
11Source electrode, PMOS manage M
12The source electrode concurrent; NMOS manages M
13Drain electrode and NMOS pipe M
9Source electrode, NMOS manage M
10The source electrode concurrent; PMOS manages M
7Drain electrode and PMOS pipe M
16Drain electrode, NMOS manage M
20Drain electrode, NMOS manage M
18The source electrode concurrent; PMOS manages M
15Drain electrode and PMOS pipe M
17Drain electrode, NMOS manage M
21Drain electrode, NMOS manage M
19The source electrode concurrent; PMOS manages M
15Grid and PMOS pipe M
16The grid concurrent, and link to each other with ground GND; PMOS manages M
16Source electrode and reference resistance R
1An end, current source I
2An end concurrent; PMOS manages M
17Source electrode and reference resistance R
1The other end, current source I
3An end concurrent; NMOS manages M
18Drain electrode and NMOS pipe M
20Grid, NMOS manage M
21Grid, current source I
4An end concurrent; NMOS manages M
19Drain electrode and PMOS pipe M
22Grid, current source I
5An end concurrent, and with said output V
BpLink to each other; PMOS manages M
22Drain electrode and NMOS pipe M
23Grid with the drain electrode concurrent and with said output V
BnLink to each other; PMOS manages M
1Source electrode, PMOS manage M
4Source electrode, PMOS manage M
6Source electrode, PMOS manage M
14Source electrode, PMOS manage M
22Source electrode, current source I
1The other end, current source I
2The other end, current source I
3The other end, current source I
4The other end, current source I
5Other end concurrent and with supply voltage V
DDLink to each other; NMOS manages M
2Source electrode, NMOS manage M
3Source electrode, NMOS manage M
5Source electrode, NMOS manage M
20Source electrode, NMOS manage M
21Source electrode, NMOS manage M
23The source electrode concurrent and link to each other with ground GND.
Among the present invention, when the input common mode voltage of rail-to-rail input operational amplifier changed, said constant transconductance control circuit (1) was through feedback, and the nmos differential input of adjusting rail-to-rail input stage (2) makes NMOS pipe M to importing right tail current with the PMOS difference
9With PMOS pipe M
11The inverse of mutual conductance sum approximate with reference resistance R
1The half the of resistance equate.And NMOS pipe M
9With NMOS pipe M
10, PMOS manages M
11With PMOS pipe M
12Be respectively that nmos differential is imported to importing right duplicating with the PMOS difference, so NMOS pipe M in the rail-to-rail input stage (2)
9With PMOS pipe M
11The mutual conductance sum equate with the mutual conductance of rail-to-rail input stage (2), thereby make rail-to-rail input operational amplifier have the characteristic of constant transconductance.Simultaneously, change reference resistance R
1Resistance, can change the mutual conductance of rail-to-rail input operational amplifier, thereby realize the adjustable function of mutual conductance.
The rail-to-rail input operational amplifier of the constant transconductance that low supply voltage mutual conductance of the present invention is adjustable has following beneficial effect:
1, the rail-to-rail input operational amplifier that utilizes the present invention to realize, when supply voltage was 1V, when 0 changed to 1V, its mutual conductance fluctuation can be about 1.2% at common mode input.Therefore the present invention can reach reasonable compromise in power consumption and aspect of performance when being used to realize the rail-to-rail input operational amplifier of constant transconductance under the low supply voltage.
2, utilize the present invention, can change the mutual conductance of rail-to-rail input operational amplifier through the resistance of reference resistance in the adjustment circuit, thereby realize that its mutual conductance is adjustable.
Description of drawings
Fig. 1 is the system assumption diagram of the rail-to-rail input operational amplifier of the adjustable constant transconductance of low supply voltage mutual conductance of the present invention
Fig. 2 is the circuit diagram of constant transconductance control circuit of the present invention
Embodiment
Below in conjunction with accompanying drawing to further explain of the present invention.
Shown in Figure 1 is the system assumption diagram of the rail-to-rail input operational amplifier of the adjustable constant transconductance of low supply voltage mutual conductance provided by the invention, comprises constant transconductance control circuit (1), rail-to-rail input stage (2) and output stage (3).
Fig. 2 is the circuit diagram of constant transconductance control circuit of the present invention.
Biasing circuit (1.1) is used for producing common bank tube M
18And M
19Bias voltage.Current source I
4With current source I
5As by M
18, M
19, M
20And M
21The active load of the trans-impedance amplifier of forming.
Current operator circuit (1.2) is used for producing metal-oxide-semiconductor M
1, M
2, M
8And M
13Bias voltage, make and flow through M
1, M
2, M
8And M
13Electric current satisfy formula (1):
I in the formula (1)
nAnd I
pBe respectively the tail current of the NMOS pipe in the rail-to-rail input stage (2) and the tail current of PMOS pipe, K
1Be scale factor, its value can equal 1, also can be less than 1.
If current source I
2And I
3The electric current that flows through is I, then current source I
1Electric current be:
M
4Pipe, M
6Pipe and M
14The ratio of the breadth length ratio of pipe is: 1: 1/K
1: 1/K
1Like this, flow through M
4, M
6Pipe and M
14The electric current of pipe is respectively:
M
9And M
10Pipe has identical breadth length ratio, and the electric current that flows through them is respectively 0.5I
nM
11And M
12Pipe has identical breadth length ratio, and the electric current that flows through them is respectively 0.5I
pM
7Pipe, M
15Pipe, M
16And M
17Pipe has identical breadth length ratio.Can know according to KCL theorem and formula (1), flow through M
7Pipe, M
15Pipe, M
16Pipe and M
17The electric current of pipe is (when difference is input as zero):
M
7Pipe, M
15Pipe, M
6Pipe, M
14Pipe, M
8Pipe, M
9Pipe, M
10Pipe, M
13Pipe, M
11Pipe and M
12Pipe constitutes a trsanscondutance amplifier, and establishing its mutual conductance is Gm1; M
16Pipe, M
17Pipe, R
1, I
2And I
3Another trsanscondutance amplifier that constitutes, establishing its mutual conductance is Gm2.Input at these two trsanscondutance amplifiers adds an identical little differential voltage (DeltaV-0) (wherein DeltaV is produced by biasing circuit (1.1)) respectively, and the current change quantity that they is produced separately through negative feedback is equal, that is: Δ i
1=Gm1*DeltaV=Δ i
2=Gm2*DeltaV, thus make these two trsanscondutance amplifiers have identical mutual conductance, i.e. Gm1=Gm2.
Gm2=gm/(2+R
1gm) (6)
Can get by formula (5) and formula (6):
Because gdsn, gdsp is usually much smaller than gmn, gmp, and formula (7) can be write as:
Because M
9Pipe and M
10Pipe and the nmos differential in the rail-to-rail input stage (2) are imported identical and have identical tail current, a M
11Pipe and M
12Pipe and the PMOS difference in the rail-to-rail input stage (2) are imported identical and have identical tail current, and the mutual conductance gm_opa of rail-to-rail input stage is:
gm_opa=gmn+gmp (9)
Can know by formula (8) and formula (9): the mutual conductance of rail-to-rail input stage, i.e. the mutual conductance of rail-to-rail input operational amplifier is:
gm_opa≈2/R
1 (10)
Can know that by formula (10) mutual conductance of rail-to-rail input stage is approximately reference resistance R
12 times of inverse, if change reference resistance R
1Value, just can change the mutual conductance of rail-to-rail input stage.
The rail-to-rail input operational amplifier of the constant transconductance that low supply voltage mutual conductance provided by the invention is adjustable has the advantage that working power voltage is low, the mutual conductance fluctuation is little.Simulation result shows, when supply voltage was 1V, when 0 changed to 1V, its mutual conductance fluctuation can be about 1.2% at common mode input.And can change the mutual conductance of rail-to-rail input operational amplifier through the resistance of reference resistance in the adjustment circuit, thereby realize that its mutual conductance is adjustable.
Claims (6)
1. the rail-to-rail input operational amplifier of the adjustable constant transconductance of a low supply voltage mutual conductance is characterized in that: be made up of constant transconductance control circuit (1), rail-to-rail input stage (2) and output stage (3);
The Vinp input of said constant transconductance control circuit (1) links to each other with Vinn with the analog input signal Vinp of outside respectively with the Vinn input; Its V
BnOutput and V
BpOutput respectively with the V of said rail-to-rail input stage (2)
BnInput and V
BpInput links to each other;
The Vinp input of said rail-to-rail input stage (2) links to each other with Vinn with the analog input signal Vinp of outside respectively with the Vinn input; Its pOp, pOn, four outputs of nOp and nOn link to each other with I_pinp, I_pinn, four inputs of I_ninp and I_ninn of said output stage (3) respectively;
The output result of the vout output output amplifier of said output stage (3).
2. the rail-to-rail input operational amplifier of the constant transconductance that low supply voltage mutual conductance according to claim 1 is adjustable; It is characterized in that: said constant transconductance control circuit (1) is by biasing circuit (1.1), and current operator circuit (1.2) and mutual conductance feedback circuit (1.3) are formed; Be used for producing output signal V
BpAnd V
Bn, control respectively in the rail-to-rail input stage (2) nmos differential input to the right tail current of PMOS difference input, make the mutual conductance of rail-to-rail input stage (2) be approximately 2 times of inverse of reference resistance resistance.
3. the rail-to-rail input operational amplifier of the constant transconductance that low supply voltage mutual conductance according to claim 2 is adjustable is characterized in that: said biasing circuit (1.1) has 2 outputs, and being used for provides bias voltage V to the metal-oxide-semiconductor of mutual conductance feedback circuit (1.3)
B3With reference voltage DeltaV; V
B3NMOS pipe M in output and the mutual conductance feedback circuit (1.3)
18With NMOS pipe M
19Grid link to each other; PMOS pipe M in DeltaV output and the mutual conductance feedback circuit (1.3)
7With PMOS pipe M
17Grid link to each other.
4. the rail-to-rail input operational amplifier of the constant transconductance that low supply voltage mutual conductance according to claim 2 is adjustable; It is characterized in that: described current operator circuit (1.2) has four outputs, and being used for provides bias voltage to the metal-oxide-semiconductor of mutual conductance feedback circuit (1.3); V
B4PMOS pipe M in output and the mutual conductance feedback circuit (1.3)
8Grid link to each other; V
B5NMOS pipe M in output and the mutual conductance feedback circuit (1.3)
13Grid link to each other; V
B6PMOS pipe M in output and the mutual conductance feedback circuit (1.3)
1Grid link to each other; V
B7NMOS pipe M in output and the mutual conductance feedback circuit (1.3)
2Grid link to each other; Make NMOS pipe M
13With PMOS pipe M
1Nmos differential input in the electric current that flows through and the rail-to-rail input stage (2) becomes certain proportionate relationship to the tail current that flows through, and makes NMOS pipe M
2With PMOS pipe M
8PMOS difference input in the electric current that flows through and the rail-to-rail input stage (2) becomes certain proportionate relationship to the tail current that flows through.
5. the rail-to-rail input operational amplifier of the constant transconductance that low supply voltage mutual conductance according to claim 2 is adjustable is characterized in that: described mutual conductance feedback circuit (1.3) is made up of 23 metal-oxide-semiconductors and 5 current sources; PMOS manages M
1Drain electrode and current source I
1An end, NMOS manage M
2Drain electrode, NMOS manage M
3Drain and gate, NMOS manage M
5The grid concurrent; NMOS manages M
5Drain electrode and PMOS pipe M
4Drain and gate, PMOS manage M
6Grid, PMOS manage M
14The grid concurrent; PMOS manages M
6Drain electrode and PMOS pipe M
7Source electrode, PMOS manage M
11Drain and gate, NMOS manage M
9The drain and gate concurrent; PMOS manages M
14Drain electrode and PMOS pipe M
15Source electrode, PMOS manage M
12Drain and gate, NMOS manage M
10The drain and gate concurrent; PMOS manages M
8Drain electrode and PMOS pipe M
11Source electrode, PMOS manage M
12The source electrode concurrent; NMOS manages M
13Drain electrode and NMOS pipe M
9Source electrode, NMOS manage M
10The source electrode concurrent; PMOS manages M
7Drain electrode and PMOS pipe M
16Drain electrode, NMOS manage M
20Drain electrode, NMOS manage M
18The source electrode concurrent; PMOS manages M
15Drain electrode and PMOS pipe M
17Drain electrode, NMOS manage M
21Drain electrode, NMOS manage M
19The source electrode concurrent; PMOS manages M
15Grid and PMOS pipe M
16The grid concurrent, and link to each other with ground GND; PMOS manages M
16Source electrode and reference resistance R
1An end, current source I
2An end concurrent; PMOS manages M
17Source electrode and reference resistance R
1The other end, current source I
3An end concurrent; NMOS manages M
18Drain electrode and NMOS pipe M
20Grid, NMOS manage M
21Grid, current source I
4An end concurrent; NMOS manages M
19Drain electrode and PMOS pipe M
22Grid, current source I
5An end concurrent, and with said output V
BpLink to each other; PMOS manages M
22Drain electrode and NMOS pipe M
23Grid with the drain electrode concurrent and with said output V
BnLink to each other; PMOS manages M
1Source electrode, PMOS manage M
4Source electrode, PMOS manage M
6Source electrode, PMOS manage M
14Source electrode, PMOS manage M
22Source electrode, current source I
1The other end, current source I
2The other end, current source I
3The other end, current source I
4The other end, current source I
5Other end concurrent and with supply voltage V
DDLink to each other; NMOS manages M
2Source electrode, NMOS manage M
3Source electrode, NMOS manage M
5Source electrode, NMOS manage M
20Source electrode, NMOS manage M
21Source electrode, NMOS manage M
23The source electrode concurrent and link to each other with ground GND.
6. according to the rail-to-rail input operational amplifier of the adjustable constant transconductance of the arbitrary described low supply voltage mutual conductance of claim 1-5; It is characterized in that; When the input common mode voltage of rail-to-rail input operational amplifier changes; Said constant transconductance control circuit (1) is through feedback, and the nmos differential input of adjusting rail-to-rail input stage (2) makes NMOS pipe M to importing right tail current with the PMOS difference
9With PMOS pipe M
11The inverse of mutual conductance sum approximate with reference resistance R
1The half the of resistance equate; And NMOS pipe M
9With NMOS pipe M
10, PMOS manages M
11With PMOS pipe M
12Be respectively that the nmos differential input is to importing right duplicating with the PMOS difference in the rail-to-rail input stage (2), NMOS manages M
9With PMOS pipe M
11The mutual conductance sum equate with the mutual conductance of rail-to-rail input stage (2), make rail-to-rail input operational amplifier have the characteristic of constant transconductance, simultaneously, change reference resistance R
1Resistance, change the mutual conductance of rail-to-rail input operational amplifier, realize that mutual conductance is adjustable.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201010236020.0A CN102340284B (en) | 2010-07-23 | 2010-07-23 | Low power voltage transconductance adjustable transconductance-constant rail-to-rail input operational amplifier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201010236020.0A CN102340284B (en) | 2010-07-23 | 2010-07-23 | Low power voltage transconductance adjustable transconductance-constant rail-to-rail input operational amplifier |
Publications (2)
Publication Number | Publication Date |
---|---|
CN102340284A true CN102340284A (en) | 2012-02-01 |
CN102340284B CN102340284B (en) | 2014-03-05 |
Family
ID=45515829
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201010236020.0A Expired - Fee Related CN102340284B (en) | 2010-07-23 | 2010-07-23 | Low power voltage transconductance adjustable transconductance-constant rail-to-rail input operational amplifier |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN102340284B (en) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103368511A (en) * | 2012-04-10 | 2013-10-23 | 精工爱普生株式会社 | Transconductance adjustment circuit, circuit device, and electronic apparatus |
CN104320096A (en) * | 2014-10-04 | 2015-01-28 | 复旦大学 | Microcurrent and current feedback chopper modulation instrument amplifier |
CN104704743A (en) * | 2012-11-16 | 2015-06-10 | 德州仪器公司 | Rail-to-rail constant transconductance differential input stage |
CN104917469A (en) * | 2015-06-10 | 2015-09-16 | 思瑞浦微电子科技(苏州)有限公司 | Rail-to-rail input fixed trans-conductance amplifier |
CN105827107A (en) * | 2016-05-12 | 2016-08-03 | 中国电子科技集团公司第二十四研究所 | Circuit of charge pump |
CN106921348A (en) * | 2017-02-27 | 2017-07-04 | 华中科技大学 | A kind of CMOS instrument amplifiers based on current feedback |
CN107210716A (en) * | 2015-01-12 | 2017-09-26 | 高通股份有限公司 | For calibrating the method and apparatus that mutual conductance or gain change with technique or condition in difference channel |
WO2018072173A1 (en) * | 2016-10-20 | 2018-04-26 | 中国科学院深圳先进技术研究院 | Fully-differential current amplifying circuit |
CN109358690A (en) * | 2018-10-09 | 2019-02-19 | 湖南国科微电子股份有限公司 | Mutual conductance constant control circuit and track to track operational amplifier |
CN109462381A (en) * | 2018-10-25 | 2019-03-12 | 苏州大学 | A kind of Operational current amplifier suitable for deep-submicron CMOS process |
CN109546975A (en) * | 2019-01-29 | 2019-03-29 | 苏州大学 | Operation transconductance amplifier |
CN109756192A (en) * | 2018-11-22 | 2019-05-14 | 合肥市芯海电子科技有限公司 | A kind of input stage of the rail-to-rail mutual conductance amplifying circuit of reliable low pressure |
CN110011627A (en) * | 2019-04-26 | 2019-07-12 | 苏州大学 | A kind of wide input range high cmrr operation transconductance amplifier |
CN110445472A (en) * | 2018-05-03 | 2019-11-12 | 联咏科技股份有限公司 | Operational amplifier and its application method with constant transconductance bias circuit |
CN113271073A (en) * | 2021-05-25 | 2021-08-17 | 天津大学 | Reconfigurable operational transconductance amplifier |
CN114785301A (en) * | 2022-04-25 | 2022-07-22 | 西北工业大学 | Rail-to-rail single-end-to-differential circuit applied to radiation particle detection chip |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5371474A (en) * | 1992-05-08 | 1994-12-06 | Philips Electronics North America Corporation | Differential amplifier having rail-to-rail input capability and square-root current control |
CN101510762A (en) * | 2009-03-12 | 2009-08-19 | 上海交通大学 | Low power supply voltage whole-differential rail-to-rail amplifying circuit |
-
2010
- 2010-07-23 CN CN201010236020.0A patent/CN102340284B/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5371474A (en) * | 1992-05-08 | 1994-12-06 | Philips Electronics North America Corporation | Differential amplifier having rail-to-rail input capability and square-root current control |
CN101510762A (en) * | 2009-03-12 | 2009-08-19 | 上海交通大学 | Low power supply voltage whole-differential rail-to-rail amplifying circuit |
Non-Patent Citations (3)
Title |
---|
唐秀清等: "一种恒定跨导轨到轨CMOS运算放大器的设计", 《集成电路应用》 * |
张强等: "高性能Rail-to-Rail恒定跨导CMOS运算放大器", 《微电子学与计算机》 * |
赵武等: "一种轨对轨两级CMOS运算放大器的设计", 《西北大学学报(自然科学版)》 * |
Cited By (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103368511A (en) * | 2012-04-10 | 2013-10-23 | 精工爱普生株式会社 | Transconductance adjustment circuit, circuit device, and electronic apparatus |
CN104704743B (en) * | 2012-11-16 | 2017-12-15 | 德州仪器公司 | Rail-to-rail constant transconductance differential input stage |
CN104704743A (en) * | 2012-11-16 | 2015-06-10 | 德州仪器公司 | Rail-to-rail constant transconductance differential input stage |
CN104320096A (en) * | 2014-10-04 | 2015-01-28 | 复旦大学 | Microcurrent and current feedback chopper modulation instrument amplifier |
CN104320096B (en) * | 2014-10-04 | 2017-04-12 | 复旦大学 | Microcurrent and current feedback chopper modulation instrument amplifier |
CN107210716A (en) * | 2015-01-12 | 2017-09-26 | 高通股份有限公司 | For calibrating the method and apparatus that mutual conductance or gain change with technique or condition in difference channel |
CN104917469A (en) * | 2015-06-10 | 2015-09-16 | 思瑞浦微电子科技(苏州)有限公司 | Rail-to-rail input fixed trans-conductance amplifier |
CN105827107A (en) * | 2016-05-12 | 2016-08-03 | 中国电子科技集团公司第二十四研究所 | Circuit of charge pump |
WO2018072173A1 (en) * | 2016-10-20 | 2018-04-26 | 中国科学院深圳先进技术研究院 | Fully-differential current amplifying circuit |
CN106921348A (en) * | 2017-02-27 | 2017-07-04 | 华中科技大学 | A kind of CMOS instrument amplifiers based on current feedback |
CN106921348B (en) * | 2017-02-27 | 2019-08-13 | 华中科技大学 | A kind of CMOS instrument amplifier based on current feedback |
CN110445472B (en) * | 2018-05-03 | 2023-04-28 | 联咏科技股份有限公司 | Operational amplifier with constant transconductance biasing circuit and method of use thereof |
CN110445472A (en) * | 2018-05-03 | 2019-11-12 | 联咏科技股份有限公司 | Operational amplifier and its application method with constant transconductance bias circuit |
CN109358690B (en) * | 2018-10-09 | 2021-03-12 | 湖南国科微电子股份有限公司 | Transconductance constant control circuit and rail-to-rail operational amplifier |
CN109358690A (en) * | 2018-10-09 | 2019-02-19 | 湖南国科微电子股份有限公司 | Mutual conductance constant control circuit and track to track operational amplifier |
CN109462381B (en) * | 2018-10-25 | 2022-07-01 | 苏州大学 | Operational current amplifier suitable for deep submicron CMOS process |
CN109462381A (en) * | 2018-10-25 | 2019-03-12 | 苏州大学 | A kind of Operational current amplifier suitable for deep-submicron CMOS process |
CN109756192A (en) * | 2018-11-22 | 2019-05-14 | 合肥市芯海电子科技有限公司 | A kind of input stage of the rail-to-rail mutual conductance amplifying circuit of reliable low pressure |
CN109756192B (en) * | 2018-11-22 | 2023-04-28 | 合肥市芯海电子科技有限公司 | Reliable input stage of low-voltage rail-to-rail transconductance amplifying circuit |
CN109546975A (en) * | 2019-01-29 | 2019-03-29 | 苏州大学 | Operation transconductance amplifier |
CN109546975B (en) * | 2019-01-29 | 2023-09-29 | 苏州大学 | operational transconductance amplifier |
CN110011627A (en) * | 2019-04-26 | 2019-07-12 | 苏州大学 | A kind of wide input range high cmrr operation transconductance amplifier |
CN110011627B (en) * | 2019-04-26 | 2023-10-03 | 苏州大学 | Wide-input-range high-common-mode rejection ratio operational transconductance amplifier |
CN113271073A (en) * | 2021-05-25 | 2021-08-17 | 天津大学 | Reconfigurable operational transconductance amplifier |
CN114785301A (en) * | 2022-04-25 | 2022-07-22 | 西北工业大学 | Rail-to-rail single-end-to-differential circuit applied to radiation particle detection chip |
CN114785301B (en) * | 2022-04-25 | 2024-07-09 | 西北工业大学 | Rail-to-rail single-ended rotating differential circuit applied to radiation particle detection chip |
Also Published As
Publication number | Publication date |
---|---|
CN102340284B (en) | 2014-03-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN102340284B (en) | Low power voltage transconductance adjustable transconductance-constant rail-to-rail input operational amplifier | |
CN104977450B (en) | A kind of current sampling circuit and method | |
CN102783026A (en) | Offset calibration and precision hysteresis for a rail-rail comparator with large dynamic range | |
CN104467716B (en) | A kind of design of the rail-to-rail amplifier of fully differential of output common mode voltage constant | |
Zhao et al. | Transconductance improvement method for low-voltage bulk-driven input stage | |
CN101917168B (en) | High switching rate transconductance amplifier for active power factor corrector | |
Wang et al. | A robust local positive feedback based performance enhancement strategy for non-recycling folded cascode OTA | |
CN104808729A (en) | Voltage stabilizer and voltage stabilizing method | |
CN111176358B (en) | Low-power-consumption low-dropout linear voltage regulator | |
CN108664077B (en) | Current transmitter circuit, corresponding device, apparatus and method | |
EP1279223A2 (en) | Boosted high gain, very wide common mode range, self-biased operational amplifier | |
CN102611400A (en) | High-gain single-stage operational transconductance amplifier | |
Raghav et al. | Design of low voltage OTA for bio-medical application | |
US9246459B2 (en) | Variable gain amplifier | |
CN104062997A (en) | High-precision high-speed current drive circuit with large output voltage swing | |
JP2013192110A (en) | Bias voltage generation circuit and differential circuit | |
CN204928758U (en) | Operation transconductance amplifier that gain promoted | |
Zhao et al. | Low-voltage process-insensitive frequency compensation method for two-stage OTA with enhanced DC gain | |
Moustakas et al. | Improved low-voltage low-power class AB CMOS current conveyors based on the flipped voltage follower | |
CN114756076B (en) | Voltage buffer circuit | |
CN116318081A (en) | Hysteresis voltage comparator | |
CN102969994B (en) | Voltage variable gain amplifying circuit | |
CN201781461U (en) | High-gain class AB operational amplifier for quiescent current accuracy control | |
Shukla et al. | Analysis of Two Stage CMOS Opamp using 90nm Technology | |
Vij et al. | An operational amplifier with recycling folded Cascode topology and adaptive biaisng |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140305 Termination date: 20160723 |