CN103296975B - Multiple power source domain operation amplifier and use its voltage generator - Google Patents
Multiple power source domain operation amplifier and use its voltage generator Download PDFInfo
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- CN103296975B CN103296975B CN201210055028.6A CN201210055028A CN103296975B CN 103296975 B CN103296975 B CN 103296975B CN 201210055028 A CN201210055028 A CN 201210055028A CN 103296975 B CN103296975 B CN 103296975B
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Abstract
A kind of multiple power source domain operation amplifier, comprises an input stage circuit, a power domain change-over circuit and an active load. Input stage circuit is in order to be converted to one group of input voltage one group of input current in one first power domain. Power domain change-over circuit is one group of output current in a second source territory in order to change this group input current. Active load is in order to produce an output voltage according to this group output current, and wherein a common mode range of output voltage is to produce translation with respect to a common mode range of this group input voltage.
Description
Technical field
The invention relates to a kind of multiple power source domain operation amplifier and use its voltage generator.
Background technology
Lead because of in the characteristic of semiconductor element, many application all need one group not temperature influence reference voltage andNegative reference voltage, its voltage swing is about+5 volts and-5 volts, approaches 6 volts of the withstand voltage upper limits of medium pressure element. Industry is generalUtilize energy-gap reference circuit (bandgapreferencecircuit) to produce and be about the zero-temperature coefficient of 1.2 volts with reference to electricityPress, then pass through taking this zero-temperature coefficient reference voltage as benchmark that voltage-stablizer (regulator) boosts and the operation of step-down, asThis can produce the needed reference voltage of various application.
Please refer to Fig. 1, it illustrates the circuit diagram of an example of conventional voltage generator. Voltage generator 10 comprises that a unit increasesBenefit buffer (unitygainbuffer) 12, one first voltage-stablizer 14 and one second voltage-stablizer 16. In Fig. 1, work electricityPress VDD to be for example 3 volts, the zero-temperature coefficient reference voltage V that energy-gap reference circuit producesrefBe for example 1.2 volts. Zero temperatureDegree coefficient reference voltage VrefCan utilize the first voltage-stablizer 14 and the second voltage-stablizer 16, by sensitivity (R1+R2)/R1=5/1.2 boosts and the operation of step-down and obtain reference voltage VOUTP=5 volts and negative reference voltage VOUTN=-5 volts.Wherein, the second voltage-stablizer 16 because taking 0 volt of ground voltage as reference point, therefore the transduction operational amplifier of its insideThe power domain of (operationaltransconductanceamplifier, OTA) 18 is required to be VDD～-2VDD=3 volt～-6 volts, exceed medium pressure element withstand voltage restriction and must adopt high voltage device. Thus, the element characteristic of high voltage deviceReduce integrated circuit performance compared with missionary society, and take a large amount of layout areas.
Please refer to Fig. 2, it illustrates another routine circuit diagram of conventional voltage generator. Voltage generator 20 comprises a unitGain buffer 22, one first voltage-stablizer 24, one second voltage-stablizer 26 and one the 3rd voltage-stablizer 28. In Fig. 2, operating voltageVDD is for example 3 volts, the zero-temperature coefficient reference voltage V that energy-gap reference circuit producesrefBe for example 1.2 volts. Zero-temperature coefficientCoefficient reference voltage VrefUtilize the first voltage-stablizer 24, the operation of boosting by sensitivity obtains reference voltageVOUTP=5 volts. In addition zero-temperature coefficient reference voltage V,refUtilize the second voltage-stablizer 26 taking 0 volt of ground voltage as reference point,Carry out the operation of step-down and first obtain-Vref=-1.2 volts, then the operation of carrying out secondary step-down by the 3rd voltage-stablizer 28 obtainsTo negative reference voltage VOUTN=-5 volts. By the two-stage stabilizator structure 26 and 28 of series connection (cascade), make the second voltage stabilizingThe power domain of device 26 is VDD～-VDD=3 volt～-3 volt, and the power domain of the 3rd voltage-stablizer 28 is GND～-2VDD=0Volt～-6 volts, all maintains the use of avoiding high voltage device in the withstand voltage scope of medium pressure element. But, produce at voltageIn the structure of device 20, the voltage-stablizer of many one-levels but can make output voltage be offset (offset) and be subject to power supply noise(powernoise) impact.
In addition, be converted in the process of negative voltage at positive voltage, voltage generator 10 and 20 must applying unit increase respectivelyBenefit buffer 12 and 22 is to make zero-temperature coefficient reference voltage VrefPossesses thrust so that electric current output to be provided. But, unit gainThe use of buffer 12 and 22 is except increasing circuit complexity and layout area, and skew and the power supply that also can increase output voltage are made an uproarThe impact of sound.
Summary of the invention
The invention relates to a kind of multiple power source domain operation amplifier and use its voltage generator. By multiple electricityThe conversion of the power domain of source domain operation amplifier, makes voltage generator not need to use high voltage device can produce required just ginsengExamine voltage and negative reference voltage.
According to a first aspect of the invention, propose a kind of multiple power source domain operation amplifier, comprise an input stage circuit,Power domain change-over circuit and an active load. Input stage circuit is in order to be converted to one group of input voltage in one first power domainOne group of interior input current. Power domain change-over circuit is that in a second source territory one group is defeated in order to change this group input currentGo out electric current. Active load is in order to produce an output voltage, a wherein common mode range phase of output voltage according to this group output currentTo produce translation for a common mode range of this group input voltage.
According to a second aspect of the invention, a kind of voltage generator is proposed, comprise a series resistor, one first voltage-stablizer withAnd one second voltage-stablizer. Series resistor has one first feedback end and one second feedback end. The first voltage-stablizer is in order to export oneOne output voltage, the first voltage-stablizer comprises a multiple power source domain operation amplifier with negative-feedback configuration, multiple power source territory fortuneCalculate amplifier operate in one first power domain with a second source territory in, it is one anti-phase defeated that multiple power source domain operation amplifier hasEnter termination and receive one first reference voltage, and a normal phase input end is coupled to the first feedback end. The second voltage-stablizer is in order to export oneThe second output voltage, the second voltage-stablizer comprises a single power supply territory that operates in one the 3rd power domain and have negative-feedback configurationOperational amplifier, single power supply domain operation amplifier has an inverting input and receives one second reference voltage, and a positiveInput is coupled to the second feedback end.
For above-mentioned and other side of the present invention is had to better understanding, an embodiment cited below particularly, and coordinate appendedGraphic, be described in detail below.
Brief description of the drawings
Fig. 1 illustrates the circuit diagram of an example of conventional voltage generator.
Fig. 2 illustrates another routine circuit diagram of conventional voltage generator.
Fig. 3 illustrates the schematic diagram according to the multiple power source domain operation amplifier of an embodiment.
Fig. 4 illustrates the circuit diagram according to the multiple power source domain operation amplifier of an embodiment.
Fig. 5 illustrates the circuit diagram according to the multiple power source domain operation amplifier of another embodiment.
Fig. 6 illustrates the circuit diagram according to the voltage generator of an embodiment.
[main element label declaration]
10,20,600: voltage generator 12,22: unity gain buffer
14,24,610: the first voltage-stablizers 16,26,620: the second voltage-stablizers
18: 28: the three voltage-stablizers of transduction operational amplifier
300,400,500,615: multiple power source domain operation amplifier
310,410,510: input stage circuit 320,420,520: power domain change-over circuit
424: the second groups of current mirrors of 422: the first groups of current mirrors
522: the first groups of 524: the second groups of connection circuits that change of connection circuit that change
330,430,530: active load 625: single power supply domain operation amplifier
Detailed description of the invention
Multiple power source territory (powerdomain) operational amplifier proposed by the invention and use its voltage generator,Conversion by power domain, to adjust the common mode range (commonmoderange) of multiple power source domain operation amplifier, makesVoltage generator does not need to use high voltage device can produce required reference voltage and negative reference voltage.
Please refer to Fig. 3, it illustrates the schematic diagram according to the multiple power source domain operation amplifier of an embodiment. Multiple power source territoryOperational amplifier 300 comprises an input stage circuit 310, a power domain change-over circuit 320 and an active load (activeLoad) 330. Input stage circuit 310 is coupled to one first voltage source V DD, and it can be defeated to, single NMOS by single PMOS inputEnter to or PMOS input to and NMOS input to form. Input stage circuit 310 is in order to by one group of input voltage(Vin+，Vin-) be converted to one group of input current (I in one first power domainin+，Iin-). The first power domain is between the first voltageBetween source and second voltage source. In this example, the first voltage source is to be exemplified as VDD, and second voltage source is be exemplified as-VDD, alsoThe first power domain is (VDD～-VDD). Particularly, the first voltage source V DD is for example 3 volts, second voltage source-VDD exampleAs it is-3 volts.
Power domain change-over circuit 320 comprises one first current buffer and one second current buffer. The first electric current is slowRush device and be coupled between input stage circuit 310 and second voltage source-VDD, and in order to change this group input current (Iin+，Iin-) beOne group of relaying electric current in a relaying power domain. The first relaying power domain between second voltage source and tertiary voltage source (for exampleFor GND) between. In this example, continuing power domain in first is to be exemplified as (VDD～GND). The second current buffer couplesBetween the first current buffer and tertiary voltage source GND, and in order to be created in a second source territory according to this group relaying electric currentOne group of interior output current (Iout+，Iout-). Second source territory is between tertiary voltage source and the 4th voltage source (being-2VDD for example)Between. In this example, second source territory is to be exemplified as (GND～-2VDD) (more specifically, to be for example 0 volt～-6 voltsSpecial).
Active load 330 can be made up of a current mirror or a current source, and it is coupled to the second current buffer and the 4thBetween voltage source-2VDD, and in order to organize output current (I according to thisout+，Iout-) generation one output voltage Vout. Wherein, output electricityPress VoutA common mode range (GND～-2VDD) with respect to this group input voltage (Vin+，Vin-) a common mode range (VDD～-VDD) be to produce translation.
Please refer to Fig. 4, it illustrates the circuit diagram according to the multiple power source domain operation amplifier of an embodiment. Multiple power source territoryOperational amplifier 400 comprises an input stage circuit 410, a power domain change-over circuit 420 and an active load 430. Input stageCircuit 410 can by a PMOS input to form, it is coupled to the first voltage source V DD. Input stage circuit 410 is by input voltage(Vin+，Vin-) be converted to input current (Iin+，Iin-). In Fig. 4, hereby lifting power domain change-over circuit 420 is current mirror frameworksCircuit is that example explains. Current mirror framework circuit 420 have one first group of current mirror 422 and one second group of current mirror 424 with pointDo not realize the first current buffer and the second current buffer.
First group of current mirror 422 is coupled between input stage circuit 410 and second voltage source-VDD, and in order to conversion inputElectric current (Iin+，Iin-) be relaying electric current (Ire+，Ire-). Second group of current mirror 424 is coupled to first group of current mirror 422 and the 3rd electricityBetween potential source GND, and in order to provide output current (I according to tertiary voltage source GND for datum markout+，Iout-) to active load430 to produce output voltage Vout. Active load 430 is coupled between second group of current mirror 424 and four voltage source-2VDD. ByIn output voltage VoutCommon mode range with respect to input voltage (Vin+，Vin-) common mode range produce translation, therefore do not need to use highPressing element can GND=0 volt be the voltage of datum mark output GND～-2VDD=0 volt～-6 volt.
Please refer to Fig. 5, it illustrates the circuit diagram according to the multiple power source domain operation amplifier of another embodiment. Multiple power sourceDomain operation amplifier 500 comprises an input stage circuit 510, a power domain change-over circuit 520 and an active load 530. InputLevel circuit 510 by a PMOS input to form, it is coupled to the first voltage source V DD. Input stage circuit 510 is by input voltage(Vin+，Vin-) be converted to input current (Iin+，Iin-). In Fig. 5, hereby lifting power domain change-over circuit 520 is that a folding type repeatedly connectsFramework circuit is that example explains. Current mirror framework circuit 520 have one first group change connection circuit (folded-cascode) 522 andOne second group of connection circuit (folded-cascode) 524 that changes is to realize respectively the first current buffer and the second current bufferingDevice.
First group of connection circuit 522 that changes is coupled between input stage circuit 510 and second voltage source-VDD, and defeated in order to changeEnter electric current (Iin+，Iin-) be relaying electric current (Ire+，Ire-). Second group of connection circuit 524 that changes be coupled to first group change connection circuit 522 withBetween the GND of tertiary voltage source, and in order to provide output current (I according to tertiary voltage source GND for datum markout+，Iout-) hadSource load 530 is to produce output voltage Vout. Active load 530 be coupled to second group of change connection circuit 524 and the 4th voltage source-Between 2VDD. Due to output voltage VoutCommon mode range with respect to input voltage (Vin+，Vin-) common mode range produce translation,Can GND=0 volt export the electricity of GND～-2VDD=0 volt～-6 volt for datum mark therefore do not need to use high voltage devicePress. In addition, due to multiple power source domain operation amplifier 500 with folding type change connecting structure receive and output current, have betterLinear voltage stabilization and anti-noise ability, and can under the condition of same power, provide higher input common-mode range and output common mode modelEnclose.
In above-mentioned power domain change-over circuit 420/520, though only describe as an example of two current buffers example, so alsoBe not limited to this, power domain change-over circuit 420/520 also can comprise one or more the 3rd current buffer, is coupled to the first electric current slowRush between device and the second current buffer, in order to according to input current (Iin+，Iin-), and produce relay in other one to multiple groupStream, and offer the second current buffer by one group in the middle of other one to multiple group of relaying electric current, wherein in other one to multiple groupThe power domain of relay stream is differing from each other.
Please refer to Fig. 6, it illustrates the circuit diagram according to the voltage generator of an embodiment. Voltage generator 600 comprises oneSeries resistor R1, one first voltage-stablizer 610 and one second voltage-stablizer 620. Series resistor R1 has one first feedback end (nodeA) with one second feedback end (Node B). The first voltage-stablizer 610 is in order to export one first output voltage VOUTN. The first voltage-stablizer 610Comprise the resistance R 3 and R4 and the transistor that there is a multiple power source domain operation amplifier 615 of negative-feedback configuration, be connected in series each otherM1, wherein R3=R1 and R4=R2. The first end of resistance R 3 is coupled to the first feedback end (node A). Transistor M1 has oneOne end is coupled to the second end and the control end that voltage source-2VDD, one second end be coupled to resistance R 4 and is coupled to multiple power sourceOne output of domain operation amplifier 615.
The side circuit framework of multiple power source domain operation amplifier 615 multiple power source domain operation amplifier as the aforementionedShown in 300/400/500. Multiple power source territory operational amplifier 615 be coupled to one first voltage source V DD and a second voltage source-Between VDD, and be coupled between a tertiary voltage source GND and a four voltage source-2VDD. Multiple power source domain operation amplifier615 operate in one first power domain (VDD～-VDD) and in a second source territory (GND～-2VDD). Multiple power source domain operationAmplifier 615 has an inverting input and receives one first reference voltage GND, and a normal phase input end is coupled to the first feedbackEnd (node A). Thus, the first feedback end (node A) can be stable at the first reference voltage GND.
The first voltage-stablizer 610 is owing to using multiple power source territory operational amplifier 615, therefore can be in the feelings that do not use high voltage deviceUnder condition, taking the first reference voltage GND as datum mark and produce the Voltage-output of GND～-2VDD=0 volt～-6 volt.
The second voltage-stablizer 620 is in order to export one second output voltage VOUTP. The second voltage-stablizer 620 comprises and operates in one the 3rdIn power domain (2VDD～GND) and there is a single power supply domain operation amplifier 625, resistance R 2, the Yi Jijing of negative-feedback configurationBody pipe M2. The first end of resistance R 2 is coupled to the second feedback end (Node B). Transistor M2 has a first end and is coupled to voltage source2VDD, one second end are coupled to the second end of resistance R 2 and a control end and are coupled to single power supply domain operation amplifier 625One output. Single power supply territory operational amplifier 625 is coupled between one the 5th voltage source 2VDD and tertiary voltage source GND. SingleOne power domain operational amplifier 625 has an inverting input and receives one second reference voltage Vref, and a normal phase input end couplingBe connected to the second feedback end (Node B). Thus, the second feedback end (Node B) can be stable at the second reference voltage Vref。
The first feedback that the second feedback end (Node B) being coupled by the second voltage-stablizer 620 provides the first voltage-stablizer 610 to coupleEnd (node A) required electric current, can merge the first voltage-stablizer 610 and the second voltage-stablizer 620. Thus, pass throughVfeedback，B＝Vref=1.2 volts and Vfeedback，A=GND=0 volt produces the required DC current resistance of flowing through in resistance R 1R2, R3 and R4, can obtain the first output voltage VOUTN=-5 volts and the second output voltage VOUTP=5 volts.
The above embodiment of the present invention disclosed multiple power source domain operation amplifier and use its voltage generator, passes throughThe conversion of the power domain of multiple power source domain operation amplifier, can adjust the common mode range of multiple power source domain operation amplifier, makesObtain voltage generator and do not need to use high voltage device, and utilize the voltage-stablizer of small number can produce required reference voltage and negativeReference voltage. Thus, not only simplify complex circuit designs degree and reduce layout area, can also significantly not reduce element notJoin caused variation and pass through the power supply noise that power transistor produces.
In sum, although the present invention discloses as above with multiple embodiment, so it is not in order to limit the present invention. ThisUnder bright, in technical field, have and conventionally know the knowledgeable, without departing from the spirit and scope of the present invention, when doing various changesWith retouching. Therefore, protection scope of the present invention is when being as the criterion depending on the appended claim scope person of defining.
Claims (27)
1. a multiple power source domain operation amplifier, comprising:
One input stage circuit, in order to be converted to one group of input voltage one group of input current in one first power domain;
One power domain change-over circuit is one group of output current in a second source territory in order to change this group input current; WithAnd
One active load, in order to produce an output voltage according to this group output current, a wherein common mode range of this output voltageBe to produce translation with respect to a common mode range of this group input voltage, this power domain change-over circuit comprises multiple current bufferings that repeatedly connectDevice, respectively those power domain that repeatedly connect current buffer are differing from each other.
2. multiple power source domain operation amplifier according to claim 1, wherein those of this power domain change-over circuit repeatedly connectCurrent buffer comprises:
One first current buffer is one group of first relaying in one first relaying power domain in order to change this group input currentElectric current, this first relaying power domain is not same as this first power domain; And
One second current buffer, in order to produce this group output current according to this group first relaying electric current.
3. multiple power source domain operation amplifier according to claim 2, wherein this input stage circuit is coupled to one first electricityPotential source, this first current buffer is coupled between this input stage circuit and a second voltage source, this second current buffer couplingBe connected between this first current buffer and a tertiary voltage source, this active load is coupled to this second current buffer and oneBetween four voltage sources.
4. multiple power source domain operation amplifier according to claim 2, wherein those of this power domain change-over circuit repeatedly connectCurrent buffer also comprises:
At least one the 3rd current buffer, is coupled between this first current buffer and this second current buffer, in order to comply withAccording to this group the first relaying electric current, and be created at least one group of the second relaying electric current in one second relaying power domain, this is in secondThe power domain that continues is not same as this first power domain and this first relaying power domain, and by the middle of this at least one group the second relaying electric currentOne group offer this second current buffer.
5. multiple power source domain operation amplifier according to claim 1, wherein this input stage circuit utilizes a PMOS inputTo or a NMOS input this input voltage being converted to this group input current.
6. multiple power source domain operation amplifier according to claim 1, wherein this input stage circuit utilizes a PMOS inputTo and a NMOS input this input voltage being converted to this group input current.
7. multiple power source domain operation amplifier according to claim 1, wherein this power domain change-over circuit is a current mirrorFramework circuit.
8. multiple power source domain operation amplifier according to claim 7, wherein this input stage circuit is coupled to one first electricityPotential source, this current mirror framework circuit has one first group of current mirror and is coupled between this input stage circuit and a second voltage source,And one second group of current mirror is coupled between this first group of current mirror and a tertiary voltage source, this active load be coupled to this secondBetween group current mirror and one the 4th voltage source.
9. multiple power source domain operation amplifier according to claim 1, wherein this power domain change-over circuit is a folding typeRepeatedly connect framework circuit.
10. multiple power source domain operation amplifier according to claim 9, wherein this input stage circuit is coupled to one first electricityPotential source, this folding type repeatedly connects framework circuit to be had one first group of connection circuit that changes and is coupled to this input stage circuit and a second voltage sourceBetween, and one second group of connection circuit that changes is coupled to this first group and changes between connection circuit and a tertiary voltage source, this active load couplingBeing connected to this second group changes between connection circuit and one the 4th voltage source.
11. multiple power source domain operation amplifiers according to claim 1, wherein this active load is by a current mirror or an electricityStream source forms.
12. 1 kinds of voltage generators, comprising:
One series resistor, has one first feedback end and one second feedback end;
One first voltage-stablizer, in order to export one first output voltage, this first voltage-stablizer comprises having more than one of negative-feedback configurationHeavy power domain operational amplifier, this multiple power source domain operation amplifier operates in one first power domain and a second source territoryIn, this multiple power source domain operation amplifier has an inverting input and receives one first reference voltage, and a normal phase input endBe coupled to this first feedback end, this multiple power source domain operation amplifier comprises multiple current buffers that repeatedly connect, and respectively those repeatedly connect electricityThe power domain of stream damper is differing from each other; And
One second voltage-stablizer, in order to export one second output voltage, this second voltage-stablizer comprises and operating in one the 3rd power domainAnd a single power supply domain operation amplifier with negative-feedback configuration, this single power supply domain operation amplifier has an anti-phase inputTermination is received one second reference voltage, and a normal phase input end is coupled to this second feedback end.
13. voltage generators according to claim 12, wherein this multiple power source territory operational amplifier is coupled to one firstBetween voltage source and a second voltage source, and be coupled between a tertiary voltage source and one the 4th voltage source this single power supply territoryOperational amplifier is coupled between one the 5th voltage source and this tertiary voltage source.
14. voltage generators according to claim 12, wherein this first feedback end and this second feedback end are steady respectivelyDue to this first reference voltage and this second reference voltage.
15. voltage generators according to claim 12, wherein this first voltage-stablizer also comprises:
At least one resistance of serial connection, has a first end and one second end each other, and this first end is serially connected with this first feedback end; WithAnd
One transistor, has a first end and is coupled to a voltage source, and one second end is coupled to this second end of this at least one resistance,And one control end be coupled to an output of this multiple power source domain operation amplifier.
16. voltage generators according to claim 12, wherein this second voltage-stablizer also comprises:
At least one resistance of serial connection, has a first end and one second end each other, and this first end is serially connected with this second feedback end; WithAnd
One transistor, has a first end and is coupled to a voltage source, and one second end is coupled to this second end of this at least one resistance,And one control end be coupled to an output of this single power supply domain operation amplifier.
17. voltage generators according to claim 12, wherein this multiple power source domain operation amplifier comprises:
One input stage circuit, comprises that one group of input is anti-as this normal phase input end of this multiple power source domain operation amplifier and thisPhase input, and the one group of input voltage receiving according to this group input, and it is defeated to be created in this first power domain one groupEnter electric current;
One power domain change-over circuit is one group of output current in this second source territory in order to change this group input current; WithAnd
One active load, in order to produce one the 3rd output voltage according to this group output current, wherein one of the 3rd output voltageCommon mode range is to produce translation with respect to a common mode range of this group input voltage, and this power domain change-over circuit comprises that those repeatedly connectCurrent buffer.
18. voltage generators according to claim 17, wherein those of this power domain change-over circuit repeatedly connect current bufferingDevice comprises:
One first current buffer is one group of first relaying in one first relaying power domain in order to change this group input currentElectric current, this first relaying power domain is not same as this first power domain; And
One second current buffer, in order to produce this group output current according to this group first relaying electric current.
19. voltage generators according to claim 18, wherein this input stage circuit is coupled to one first voltage source, and this is years oldOne current buffer is coupled between this input stage circuit and a second voltage source, this second current buffer be coupled to this firstBetween current buffer and a tertiary voltage source, this active load be coupled to this second current buffer and one the 4th voltage source itBetween.
20. voltage generators according to claim 18, wherein those of this power domain change-over circuit repeatedly connect current bufferingDevice also comprises:
At least one the 3rd current buffer, is coupled between this first current buffer and this second current buffer, in order to comply withAccording to this group the first relaying electric current, and be created at least one group of the second relaying electric current in one second relaying power domain, this is in secondThe power domain that continues is not same as this first power domain and this first relaying power domain, and by the middle of this at least one group the second relaying electric currentOne group offer this second current buffer.
21. voltage generators according to claim 17, wherein this input stage circuit utilize a PMOS input to or oneNMOS inputs this input voltage being converted to this group input current.
22. voltage generators according to claim 17, wherein this input stage circuit utilize a PMOS input to and oneNMOS inputs this input voltage being converted to this group input current.
23. voltage generators according to claim 17, wherein this power domain change-over circuit is a current mirror framework circuit.
24. voltage generators according to claim 23, wherein this input stage circuit is coupled to one first voltage source, this electricityStream mirror holder structure circuit has one first group of current mirror and is coupled between this input stage circuit and a second voltage source, with one second groupCurrent mirror is coupled between this first group of current mirror and a tertiary voltage source, this active load be coupled to this second group of current mirror withBetween one the 4th voltage source.
25. voltage generators according to claim 17, wherein this power domain change-over circuit is that a folding type repeatedly connects frameworkCircuit.
26. voltage generators according to claim 25, wherein this input stage circuit is coupled to one first voltage source, this foldingRepeatedly formula repeatedly connects framework circuit and has one first group of connection circuit that changes and be coupled between this input stage circuit and a second voltage source, with oneSecond group of connection circuit that changes is coupled to this first group and changes between connection circuit and a tertiary voltage source, this active load be coupled to this secondGroup changes between connection circuit and one the 4th voltage source.
27. voltage generators according to claim 17, wherein this active load is made up of a current mirror or a current source.
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| CN106505953B (en) * | 2016-07-05 | 2019-03-22 | 络达科技股份有限公司 | Operational amplifier circuit |
| CN114003079B (en) * | 2020-07-28 | 2023-08-08 | 瑞昱半导体股份有限公司 | Circuit applied to multiple power domains |
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| US5581212A (en) * | 1993-10-18 | 1996-12-03 | Industrial Technology Research Institute | Fully differential CMOS transconductance-transimpedance wide-band amplifier |
| US6833760B1 (en) * | 2003-07-07 | 2004-12-21 | National Semiconductor Corporation | Low power differential amplifier powered by multiple unequal power supply voltages |
| CN101453835A (en) * | 2007-12-04 | 2009-06-10 | 华为技术有限公司 | Transformer, method and device for capacitor integration package |
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| US7663439B2 (en) * | 2007-12-06 | 2010-02-16 | Himax Technologies Limited | Operational amplifier |
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| US5581212A (en) * | 1993-10-18 | 1996-12-03 | Industrial Technology Research Institute | Fully differential CMOS transconductance-transimpedance wide-band amplifier |
| US6833760B1 (en) * | 2003-07-07 | 2004-12-21 | National Semiconductor Corporation | Low power differential amplifier powered by multiple unequal power supply voltages |
| CN101453835A (en) * | 2007-12-04 | 2009-06-10 | 华为技术有限公司 | Transformer, method and device for capacitor integration package |
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