CN208522716U - A kind of low-power consumption broadband mutual conductance error amplifier - Google Patents
A kind of low-power consumption broadband mutual conductance error amplifier Download PDFInfo
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Abstract
The application has the difference amplifier of common mode feedback loop by first order design, improve the common-mode rejection ratio of circuit, stabilize the common mode electrical level of output, this design simultaneously can be such that the gain of the first order and the amplitude of oscillation further increases, the second level improves the mutual conductance and circuit drives ability of the mutual conductance error amplifier using common-source stage and class AB output stage amplifier simultaneously, and then improve the unity gain bandwidth of circuit, therefore it simplifies the design of Commom-mode feedback circuit while reducing the stability that power consumption improves circuit, it is complex to solve traditional common mode feedback circuit design, the technical issues of adding somewhat to the power consumption of amplifier.
Description
Technical field
The utility model relates to circuit amplifier technical fields more particularly to a kind of low-power consumption broadband mutual conductance error to amplify
Device.
Background technique
Operation transconductance amplifier is often simply called (OTA), is a kind of operational amplifier of input voltage control output electric current, is
Basic unit in Analogous Integrated Electronic Circuits, and constitute the basic module of many Analogous Integrated Electronic Circuits systems.Such as operation amplifier
Device (OPA) is made of operation transconductance amplifier plus Buffer output grade, and operational amplifier is in linear circuit using the most
Universal element circuit accounts for about the 20% of total Analogous Integrated Electronic Circuits.Operational amplifier is in simulation trial, signal processing, modulus
It is widely used in conversion and active filter.Compared with operational amplifier, OTA has more simple circuit structure, makes
Circuit power consumption substantially reduces, therefore becomes the research hotspot of microelectronic field.
Currently in order to the OTA that higher gain generally uses two-stage is obtained, because the result low frequency loop gain of level-one is not
It is enough, it be easy to cause static gain error, output valve precision that performance is not enough caused to be difficult to meet the needs of system in this way.And it is general
It is all the mechanism using Differential OPAMP, because Differential OPAMP is compared to single-ended amplifier with certain advantage.First its
Output uses fully differential form, has symmetry in structure, can resist common-mode noise, there is better common-mode signal rejection characteristic；
Secondly Differential OPAMP can offset even-order harmonic, be capable of providing preferable output linearity degree characteristic；Finally, in structure, it is single-ended
Output mirror image pole more than fully differential, thus the speed of limit feedback system.So what the structure of the first order was generally taken
Differential amplifier arrangements, for example relatively common Foldable cascade difference amplifier is as first order amplifier, such as Fig. 1 institute
Show, the error amplifier using this structure as the first order has biggish gain, but has higher noise, lesser simultaneously
It is secondary, and lesser secondary point be as caused by its first order relatively large load capacitor, so cause its bandwidth smaller, speed
It is also restrained.Although this Foldable cascade difference amplifier increases the amplitude of oscillation compared to telescopic structure, pendulum
The promotion of width nevertheless suffers from limitation, while increasing power consumption.The structure of another fully-differential amplifier as shown in Fig. 2, using
The fully differential trsanscondutance amplifier of this two-level configuration, can satisfy gain and the requirement of the amplitude of oscillation, but bandwidth is still smaller, output
The driving capability of grade is insufficient.For Fig. 1, two kinds of structures shown in Fig. 2, it is contemplated that process deviation, due to the mismatch of current mirror,
The common mode electrical level of difference amplifier output end is unstable, while common mode feedback circuit also being needed to stablize output.However, traditional is total to
Cmfb circuit design is complex, in order to meet the requirement of bandwidth, adds somewhat to the power consumption of amplifier.
Utility model content
The utility model provides a kind of low-power consumption broadband mutual conductance error amplifier, for solving traditional common-mode feedback electricity
The technical issues of road design is complex, adds somewhat to the power consumption of amplifier.
In view of this, this application provides a kind of low-power consumption broadband mutual conductance error amplifiers, comprising: bias voltage module,
Difference amplifier, common-source stage and class AB output stage amplifier with common mode feedback loop；
The bias voltage module connects the difference amplifier, for providing bias voltage；
The output end of the difference amplifier with common mode feedback loop connects the common-source stage and classAB output stage
The input terminal of amplifier, for amplifying the error between the first input voltage and the second input voltage and exporting to the common-source stage
It is further amplified with class AB output stage amplifier；
The common-source stage and the output end of class AB output stage amplifier export electric current IEA.
Preferably, the difference amplifier with common mode feedback loop specifically includes: transistor Mbp1, transistor
Mbp2, transistor Mbp3, transistor M1, transistor M2, transistor M3, transistor M4, transistor M5, transistor M6, transistor
Mf1 and transistor Mf2；
Transistor Mbp1, transistor Mbp2 connect power supply Vdd with the respective first end of transistor Mbp3；
Transistor M1 connects the second end of transistor Mbp3 with the respective first end of transistor M2；
Transistor M3 connects the second end of transistor M1 with the respective second end of transistor M5；
Transistor M4 connects the second end of transistor M2 with the respective second end of transistor M6；
Transistor M3, transistor M4, transistor M5 and the respective first end of transistor M6 are interconnected and are grounded；
The second end of the first end connection transistor M1 of transistor Mf1, the second end of transistor Mf1 connect transistor Mbp1
Second end；
The second end of the first end connection transistor M2 of transistor Mf2, the second end of transistor Mf2 connect transistor Mbp2
Second end；
The respective third end transistor M1 and transistor M2 is the defeated of the difference amplifier with common mode feedback loop
Enter end, for receiving the first input voltage and the second input voltage；
The second end that transistor M3 connects transistor Mf2 with the third end of transistor M4 has common-mode feedback loop as described
First output end of the difference amplifier on road；
The second end that transistor M5 connects transistor Mf1 with the third end of transistor M6 has common-mode feedback loop as described
The second output terminal of the difference amplifier on road.
Preferably, the common-source stage and class AB output stage amplifier by transistor M7, transistor M8, transistor M9,
Transistor M10, transistor M11 and transistor M12 form commonsource amplifier, are made of transistor M13 and transistor M14
ClassAB output stage amplifier.
Preferably, the first end ground connection of transistor M7, the second end of the second end connection transistor M8 of transistor M7, crystal
The first end of pipe M8 connects power supply Vdd；
The first end of transistor M10 is grounded, the second end of the second end connection transistor M9 of transistor M10, transistor M9
First end connect power supply Vdd；
The first end of transistor M12 is grounded, the second end of the second end connection transistor M11 of transistor M12, transistor
The first end of M11 connects power supply Vdd；
The second end of transistor M8, the third end of transistor M8 are connected with the third end of transistor M9；
The second end of transistor M10, the third end of transistor M10 are connected with the third end of transistor M14；
The second end of transistor M11, the third end of transistor M11 are connected with the third end of transistor M13；
First output end of the third end connection difference amplifier with common mode feedback loop of transistor M12；
The second output terminal of the third end connection difference amplifier with common mode feedback loop of transistor M7；
The first end of transistor M13 connects power supply Vdd, the first end ground connection of transistor M14, the second end of transistor M13
It is connected with the second end of transistor M14 and as the common-source stage and the output end of class AB output stage amplifier output electric current
IEA。
Preferably, the bias voltage module is specially current mirror.
Preferably, the current mirror is made of current source, the first transistor, second transistor and third transistor；
The first end of the current source connects power supply Vdd, and the second end of the current source connects the first transistor
First output end of the second end with third end and as the current mirror connects third end and the transistor Mf2 of transistor Mf1
Third end；
The first end of the first transistor is grounded, and the third end of the first transistor is also connected with the second transistor
Third end, the first end ground connection of the second transistor, the second end of the second transistor connects the third transistor
Second end, the first end of the third transistor connects power supply Vdd, and the third end of the third transistor is as the electric current
The second output terminal of mirror is separately connected transistor Mbp1, transistor Mbp2 and the respective third end transistor Mbp3.
Preferably, the mutual conductance relationship between the transistor M3, transistor M4, transistor M5 and transistor M6 are as follows:
gm(M4)=gm(M5)=2gm(M3)=2gm(M6)。
Preferably, the power supply Vdd is regulated power supply.
Preferably, the transistor is field-effect tube, and the first end of the transistor is the source electrode of the field-effect tube, institute
The second end for stating transistor is the drain electrode of the field-effect tube, and the third end of the transistor is the base stage of the field-effect tube.
Preferably, the transistor is triode, and the first end of the transistor is the emitter of the triode, described
The second end of transistor is the collector of the triode, and the third end of the transistor is the base stage of the triode.
As can be seen from the above technical solutions, the utility model has the advantage that
This application provides a kind of low-power consumption broadband mutual conductance error amplifiers, comprising: bias voltage module has common mode anti-
Present difference amplifier, common-source stage and the class AB output stage amplifier of loop；The bias voltage module connects the difference
Amplifier, for providing bias voltage；The output end of the difference amplifier with common mode feedback loop connects the common source
The input terminal of grade and class AB output stage amplifier, for amplifying the error between the first input voltage and the second input voltage
And it exports to the common-source stage and class AB output stage amplifier and is further amplified；The common-source stage and class AB output stage
The output end of amplifier exports electric current IEA.The application has the difference amplifier of common mode feedback loop by first order design, mentions
The common-mode rejection ratio of high circuit stabilizes the common mode electrical level of output, while this design can make the gain and the amplitude of oscillation of the first order
It further increases, while the second level improves the mutual conductance error amplifier using common-source stage and class AB output stage amplifier
Mutual conductance and circuit drives ability, and then the unity gain bandwidth of circuit is improved, therefore simplify setting for Commom-mode feedback circuit
Meter reduces the stability that power consumption improves circuit simultaneously, solve traditional common mode feedback circuit design it is complex, centainly
The technical issues of power consumption of amplifier is increased in degree.
Detailed description of the invention
It, below will be to required in embodiment or description of the prior art in order to illustrate more clearly of the utility model embodiment
The attached drawing used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the utility model
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the circuit diagram of folded cascode configuration in the prior art；
Fig. 2 is the circuit diagram of two-stage fully differential mutual conductance error amplifier in the prior art；
Fig. 3 is a kind of schematic diagram of low-power consumption broadband mutual conductance error amplifier provided by the present application.
Specific embodiment
The utility model provides a kind of low-power consumption broadband mutual conductance error amplifier, for solving traditional common-mode feedback electricity
The technical issues of road design is complex, adds somewhat to the power consumption of amplifier.
It, below will knot to enable the purpose of utility model, feature, advantage of the utility model more obvious and understandable
The attached drawing in the utility model embodiment is closed, the technical scheme in the utility model embodiment is clearly and completely described,
Obviously, the embodiments described below are only the utility model a part of the embodiment, and not all embodiment.Based on this reality
It is obtained by those of ordinary skill in the art without making creative efforts all other with the embodiment in novel
Embodiment is fallen within the protection scope of the utility model.
In order to make it easy to understand, referring to Fig. 3, Fig. 3 is a kind of low-power consumption broadband mutual conductance error amplification in the embodiment of the present application
The circuit diagram of device, as shown in figure 3, the low-power consumption broadband mutual conductance error amplifier includes: bias voltage module, has common-mode feedback
Difference amplifier, common-source stage and the class AB output stage amplifier of loop；
Bias voltage module connects difference amplifier, for providing bias voltage；
The output end connection common-source stage and class AB output stage amplifier of difference amplifier with common mode feedback loop
Input terminal, for amplifying the error between the first input voltage and the second input voltage and exporting to common-source stage and class AB
Output stage amplifier is further amplified；
Common-source stage and the output end of class AB output stage amplifier export electric current IEA.
The application has the difference amplifier of common mode feedback loop by first order design, improves the common mode inhibition of circuit
Than, the common mode electrical level of output is stabilized, while this design can be such that the gain of the first order and the amplitude of oscillation further increases, while the
Second level improves mutual conductance and the circuit drives energy of the mutual conductance error amplifier using common-source stage and class AB output stage amplifier
Power, and then the unity gain bandwidth of circuit is improved, therefore simplify the design of Commom-mode feedback circuit while reducing power consumption
The stability for improving circuit, it is complex to solve traditional common mode feedback circuit design, adds somewhat to amplify
The technical issues of power consumption of device.
Two-stage low-power consumption broadband mutual conductance error amplifier designed by the application, the first order are that difference amplifier and common mode are anti-
Loop composition is presented, the common-mode rejection ratio of circuit can be improved in common mode feedback loop, improves output common mode stabilization of level；Second
The amplifier for common-source stage and class AB the output stage combination that grade uses, it improves the mutual conductance of circuit, to improve entire
The design of the unity gain bandwidth of circuit, entire circuit has low-power consumption, wide bandwidth, relatively reasonable input/output amplitude of oscillation model
It encloses and the performances such as high-gain.
Further, specifically included with the difference amplifier of common mode feedback loop: transistor Mbp1, transistor Mbp2,
Transistor Mbp3, transistor M1, transistor M2, transistor M3, transistor M4, transistor M5, transistor M6, transistor Mf1 and
Transistor Mf2；
Transistor Mbp1, transistor Mbp2 connect power supply Vdd with the respective first end of transistor Mbp3；
Transistor M1 connects the second end of transistor Mbp3 with the respective first end of transistor M2；
Transistor M3 connects the second end of transistor M1 with the respective second end of transistor M5；
Transistor M4 connects the second end of transistor M2 with the respective second end of transistor M6；
Transistor M3, transistor M4, transistor M5 and the respective first end of transistor M6 are interconnected and are grounded；
The second end of the first end connection transistor M1 of transistor Mf1, the second end of transistor Mf1 connect transistor Mbp1
Second end；
The second end of the first end connection transistor M2 of transistor Mf2, the second end of transistor Mf2 connect transistor Mbp2
Second end；
The respective third end transistor M1 and transistor M2 is the input terminal of the difference amplifier with common mode feedback loop,
For receiving the first input voltage and the second input voltage；
Transistor M3 connects the second end of transistor Mf2 with the third end of transistor M4 as with common mode feedback loop
First output end of difference amplifier；
Transistor M5 connects the second end of transistor Mf1 with the third end of transistor M6 as with common mode feedback loop
The second output terminal of difference amplifier.
It should be noted that transistor Mbp1, transistor Mbp2, transistor Mbp3, transistor Mf1 and transistor Mf2 are each
From base stage be all that the port of bias voltage is received in the difference amplifier with common mode feedback loop, therefore it is all connected
Bias voltage module.Also, transistor Mf1 and the bias voltage of the respective base stage of transistor Mf2 are the Vbn in Fig. 3, and crystal
The base stage line of pipe Mf2 is succinctly to be not drawn into, and connects and provides the conducting wire of bias voltage Vbn in bias voltage module.
Further, common-source stage and class AB output stage amplifier are by transistor M7, transistor M8, transistor M9, crystalline substance
Body pipe M10, transistor M11 and transistor M12 form commonsource amplifier, are made of transistor M13 and transistor M14
ClassAB output stage amplifier.
Further, the first end ground connection of transistor M7, the second end of the second end connection transistor M8 of transistor M7 are brilliant
The first end of body pipe M8 connects power supply Vdd；
The first end of transistor M10 is grounded, the second end of the second end connection transistor M9 of transistor M10, transistor M9
First end connect power supply Vdd；
The first end of transistor M12 is grounded, the second end of the second end connection transistor M11 of transistor M12, transistor
The first end of M11 connects power supply Vdd；
The second end of transistor M8, the third end of transistor M8 are connected with the third end of transistor M9；
The second end of transistor M10, the third end of transistor M10 are connected with the third end of transistor M14；
The second end of transistor M11, the third end of transistor M11 are connected with the third end of transistor M13；
The third end connection of transistor M12 has the first output end of the difference amplifier of common mode feedback loop；
The third end connection of transistor M7 has the second output terminal of the difference amplifier of common mode feedback loop；
The first end of transistor M13 connects power supply Vdd, the first end ground connection of transistor M14, the second end of transistor M13
It is connected with the second end of transistor M14 and as common-source stage and the output end of class AB output stage amplifier output electric current IEA.
Further, bias voltage module is specially current mirror.
Further, current mirror is made of current source, the first transistor, second transistor and third transistor；
The first end of current source connects power supply Vdd, the second end and third of the second end connection the first transistor of current source
It holds and connects the third end of transistor Mf1 and the third end of transistor Mf2 as the first output end of current mirror；
The first end of the first transistor is grounded, and the third end of the first transistor is also connected with the third end of second transistor, the
The first end of two-transistor is grounded, the second end of the second end connection third transistor of second transistor, and the of third transistor
One end connects power supply Vdd, and the third end of third transistor is separately connected transistor Mbp1, crystalline substance as the second output terminal of current mirror
The respective third end body pipe Mbp2 and transistor Mbp3.
Further, the mutual conductance relationship between transistor M3, transistor M4, transistor M5 and transistor M6 are as follows:
gm(M4)=gm(M5)=2gm(M3)=2gm(M6)。
Further, power supply Vdd is regulated power supply.
Further, as the embodiment of the application, as shown in figure 3, transistor is field-effect tube, transistor
First end is the source electrode of field-effect tube, and the second end of transistor is the drain electrode of field-effect tube, and the third end of transistor is field-effect
The base stage of pipe.In the present embodiment, the first input voltage is feedback voltage V FB, and the second input voltage is offset voltage VCOM, is such as schemed
Shown in 3.
Below with regard to carrying out principle explanation using the embodiment of field-effect tube:
As Fig. 3 shows the schematic diagram of error amplifier.Error between feedback voltage V FB and offset voltage VCOM is put
Greatly and be converted to output electric current IEA.Under DC level, output electric current IEA is ideally zero.Error amplifier includes two
A stage.One stage is the difference amplifier with common mode feedback loop (CMFB).Assuming that the electric current of Mbp3 is IB, and Mbp1
(Mbp2) electric current is K*IB, K is preset definite value.Based on the size of transistor M3, M4, M5 and M6, may be expressed as:
Therefore, the relationship between the mutual conductance of transistor M3, M4, M5 and M6 is writeable are as follows:
gm(M4)=gm(M5)=2gm(M3)=2gm(M6)。
Small signal gain provides are as follows:
Compared with diode connection load, since the drain voltage of M3 (M6) is unrelated with overdrive voltage, Vo+ and Vo-'s
The amplitude of oscillation can increase.Moreover, I(M1)With I(M3)Ratio be given by:
As K < 1, the limitation between gain and output voltage swing can further relax.In the present embodiment, K is set as 1/4.
AB grades of output stages of subsequent common-source stage and clas are for increasing mutual conductance and improving driving capability.Error amplifier
Mutual conductance is given are as follows:
So the low-power consumption broadband of the application is cross over the unity gain bandwidth of error amplifier are as follows:
Wherein, C(L)For load capacitance.
As shown in figure 3, M3-M6 is both load pipe also in the loop of common mode feedback circuit, they are constituted with Mf1, Mf2
Common mode feedback loop (CMFB), improves the common-mode rejection ratio of circuit, stabilizes the common mode electrical level of output, while this design can be with
The gain and the amplitude of oscillation for making the first order further increase；And M7-M12 and M13-M14 constitute common-source stage and class AB output stage
Amplifier, improves the mutual conductance and circuit drives ability of the mutual conductance error amplifier, and then improves the unit gain band of circuit
It is wide.
The low-power consumption broadband of the application is cross over the structure that error amplifier uses second level trsanscondutance amplifier.The first order is using wide
Band, low-power consumption fully-differential amplifier, gain and output driving energy are improved by common-source stage and CLASS AB output stage in the second level
Power.
Also, by the common mode feedback loop module for increasing the first order, the common-mode rejection ratio of entire circuit can be improved
The gain of the first order and the amplitude of oscillation can be made to be effectively improved simultaneously.M3-M6 is both load pipe also in common mode feedback circuit
In loop, simplifies the design of Commom-mode feedback circuit while reducing the stability that power consumption improves circuit.
The first order of the OTA of some fully differentials uses Foldable cascade difference amplifier, using this structure conduct
The error amplifier of the first order has biggish gain, but has higher noise, lesser secondary point simultaneously, and lesser secondary
Point is as caused by its first order relatively large load capacitor, so causing its bandwidth smaller, speed is also restrained.Although this
Foldable cascade difference amplifier increases the amplitude of oscillation compared to telescopic structure, but the promotion of the amplitude of oscillation nevertheless suffers from limit
System, while increasing power consumption.And the first order designed by the application is improved fully-differential amplifier and common mode feedback loop, is somebody's turn to do
Fully-differential amplifier has the characteristic in broadband, low-power consumption, while having stable output common mode level and the biggish amplitude of oscillation；
Also, the structure used in Fig. 2 can satisfy gain using the fully differential trsanscondutance amplifier of this two-level configuration
With the requirement of the amplitude of oscillation, but bandwidth is still smaller, and the driving capability of output stage is insufficient.And the application second level using common-source stage and
The amplifier of class AB output stage combination improves mutual conductance and the output current capacity of error amplifier, increases the list of amplifier
Position gain bandwidth.
Two-stage low-power consumption broadband mutual conductance error amplifier designed by the application, the first order are that difference amplifier and common mode are anti-
Loop composition is presented, the common-mode rejection ratio of circuit can be improved in common mode feedback loop, improves output common mode stabilization of level；Second
The amplifier for common-source stage and class AB the output stage combination that grade uses, it improves the mutual conductance of circuit, to improve entire
The design of the unity gain bandwidth of circuit, entire circuit has low-power consumption, wide bandwidth, relatively reasonable input/output amplitude of oscillation model
It encloses and the performances such as high-gain.
Further, as the embodiment of the application, transistor is triode, and the first end of transistor is three poles
The emitter of pipe, the second end of transistor are the collector of triode, and the third end of transistor is the base stage of triode.Transistor
It is identical as field-effect tube for the embodiment principle of triode, therefore do not repeat them here.
The above, above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although ginseng
The utility model is described in detail according to previous embodiment, those skilled in the art should understand that: it is still
It is possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is equally replaced
It changes；And these are modified or replaceed, various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution
Spirit and scope.
Claims (10)
1. a kind of low-power consumption broadband mutual conductance error amplifier characterized by comprising bias voltage module has common-mode feedback
Difference amplifier, common-source stage and the class AB output stage amplifier of loop；
The bias voltage module connects the difference amplifier, for providing bias voltage；
The output end of the difference amplifier with common mode feedback loop connects the common-source stage and class AB output stage is put
The input terminal of big device, for amplify the error between the first input voltage and the second input voltage and output to the common-source stage and
Class AB output stage amplifier is further amplified；
The common-source stage and the output end of class AB output stage amplifier export electric current IEA.
2. a kind of low-power consumption broadband mutual conductance error amplifier according to claim 1, which is characterized in that described that there is common mode
The difference amplifier of feedback control loop specifically includes: transistor Mbp1, transistor Mbp2, transistor Mbp3, transistor M1, transistor
M2, transistor M3, transistor M4, transistor M5, transistor M6, transistor Mf1 and transistor Mf2；
Transistor Mbp1, transistor Mbp2 connect power supply Vdd with the respective first end of transistor Mbp3；
Transistor M1 connects the second end of transistor Mbp3 with the respective first end of transistor M2；
Transistor M3 connects the second end of transistor M1 with the respective second end of transistor M5；
Transistor M4 connects the second end of transistor M2 with the respective second end of transistor M6；
Transistor M3, transistor M4, transistor M5 and the respective first end of transistor M6 are interconnected and are grounded；
The second end of the first end connection transistor M1 of transistor Mf1, the of the second end connection transistor Mbp1 of transistor Mf1
Two ends；
The second end of the first end connection transistor M2 of transistor Mf2, the of the second end connection transistor Mbp2 of transistor Mf2
Two ends；
The respective third end transistor M1 and transistor M2 is the input terminal of the difference amplifier with common mode feedback loop,
For receiving the first input voltage and the second input voltage；
The second end that transistor M3 connects transistor Mf2 with the third end of transistor M4 has common mode feedback loop as described in
First output end of difference amplifier；
The second end that transistor M5 connects transistor Mf1 with the third end of transistor M6 has common mode feedback loop as described in
The second output terminal of difference amplifier.
3. a kind of low-power consumption broadband mutual conductance error amplifier according to claim 2, which is characterized in that the common-source stage and
Class AB output stage amplifier is by transistor M7, transistor M8, transistor M9, transistor M10, transistor M11 and transistor
M12 forms commonsource amplifier, forms classAB output stage amplifier by transistor M13 and transistor M14.
4. a kind of low-power consumption broadband mutual conductance error amplifier according to claim 3, which is characterized in that
The first end of transistor M7 is grounded, the second end of the second end connection transistor M8 of transistor M7, and the first of transistor M8
End connection power supply Vdd；
The first end of transistor M10 is grounded, the second end of the second end connection transistor M9 of transistor M10, and the of transistor M9
One end connects power supply Vdd；
The first end of transistor M12 is grounded, the second end of the second end connection transistor M11 of transistor M12, transistor M11's
First end connects power supply Vdd；
The second end of transistor M8, the third end of transistor M8 are connected with the third end of transistor M9；
The second end of transistor M10, the third end of transistor M10 are connected with the third end of transistor M14；
The second end of transistor M11, the third end of transistor M11 are connected with the third end of transistor M13；
First output end of the third end connection difference amplifier with common mode feedback loop of transistor M12；
The second output terminal of the third end connection difference amplifier with common mode feedback loop of transistor M7；
The first end of transistor M13 connects power supply Vdd, the first end ground connection of transistor M14, the second end and crystalline substance of transistor M13
The second end of body pipe M14 connects and exports electric current IEA as the common-source stage and the output end of class AB output stage amplifier.
5. a kind of low-power consumption broadband mutual conductance error amplifier according to claim 2, which is characterized in that the bias voltage
Module is specially current mirror.
6. a kind of low-power consumption broadband mutual conductance error amplifier according to claim 5, which is characterized in that the current mirror by
Current source, the first transistor, second transistor and third transistor composition；
The first end of the current source connects power supply Vdd, and the second end of the current source connects the second of the first transistor
The first output end with third end and as the current mirror is held to connect the third end of transistor Mf1 and the third of transistor Mf2
End；
The first end of the first transistor is grounded, and the third end of the first transistor is also connected with the of the second transistor
Three ends, the first end ground connection of the second transistor, the second end of the second transistor connect the of the third transistor
The first end at two ends, the third transistor connects power supply Vdd, and the third end of the third transistor is as the current mirror
Second output terminal is separately connected transistor Mbp1, transistor Mbp2 and the respective third end transistor Mbp3.
7. a kind of low-power consumption broadband mutual conductance error amplifier according to claim 2, which is characterized in that the transistor
Mutual conductance relationship between M3, transistor M4, transistor M5 and transistor M6 are as follows:
gm(M4)=gm(M5)=2gm(M3)=2gm(M6)。
8. a kind of low-power consumption broadband mutual conductance error amplifier according to claim 2, which is characterized in that the power supply Vdd
For regulated power supply.
9. a kind of low-power consumption broadband mutual conductance error amplifier according to claim 2, which is characterized in that the transistor is
Field-effect tube, the first end of the transistor are the source electrode of the field-effect tube, and the second end of the transistor is field effect
Should pipe drain electrode, the third end of the transistor is the base stage of the field-effect tube.
10. a kind of low-power consumption broadband mutual conductance error amplifier according to claim 2, which is characterized in that the transistor
For triode, the first end of the transistor is the emitter of the triode, and the second end of the transistor is three pole
The collector of pipe, the third end of the transistor are the base stage of the triode.
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| CN201821321705.3U CN208522716U (en) | 2018-08-15 | 2018-08-15 | A kind of low-power consumption broadband mutual conductance error amplifier |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599731A (en) * | 2018-08-15 | 2018-09-28 | 广东工业大学 | A kind of low-power consumption broadband mutual conductance error amplifier |
| CN114448367A (en) * | 2020-11-02 | 2022-05-06 | 圣邦微电子（北京）股份有限公司 | Common mode feedback circuit of fixed potential |
-
2018
- 2018-08-15 CN CN201821321705.3U patent/CN208522716U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599731A (en) * | 2018-08-15 | 2018-09-28 | 广东工业大学 | A kind of low-power consumption broadband mutual conductance error amplifier |
| CN108599731B (en) * | 2018-08-15 | 2024-07-19 | 广东工业大学 | Low-power-consumption broadband transconductance error amplifier |
| CN114448367A (en) * | 2020-11-02 | 2022-05-06 | 圣邦微电子（北京）股份有限公司 | Common mode feedback circuit of fixed potential |
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