CN110166008A - A kind of adaptive bipolar amplifier with linear bias circuit - Google Patents
A kind of adaptive bipolar amplifier with linear bias circuit Download PDFInfo
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
- H03F3/245—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages with semiconductor devices only
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Abstract
The invention discloses a kind of adaptive bipolar amplifier with linear bias circuit, including linear bias circuit, adaptive circuit and bipolar amplifier, the linear bias circuit is connect by the adaptive circuit with the bipolar amplifier.The utility model has the advantages that passing through the size for changing constant-current source IDC, thus it is possible to vary radio-frequency power amplifier tube bias electric current can either meet linear requirements so that radio-frequency power amplifier tube can select bias state according to the size of output power, and influence on power efficiency smaller.By being added to a coupled capacitor C4 and two sections of microstrip lines on the basis of traditional linear biasing circuit, adaptive linear biasing circuit makes Power Amplifier Unit with the increase of input power and is in a relatively stable angle of flow state, to reach the optimal state of a linearity and efficiency.
Description
Technical field
The present invention relates to amplifier technique fields, it particularly relates to a kind of adaptive double with linear bias circuit
Polar form amplifier.
Background technique
Bipolar amplifier is usually current feedback, and DC characteristic is bad, is suitble to the AC signal of amplification high frequency, band
It is wide not reduce because gain increases, that is, the not concept of gain bandwidth product, the feedback resistance of usual Current feedback operational amplifier
For constant value.Fig. 2 is the schematic diagram of Current feedback operational amplifier, firstly, the input terminal of Current feedback operational amplifier is not that voltage is anti-
The differential input end of feedback type amplifying circuit, but a gain of an input terminal from V+ to V- follows circuit close to 1, this
As soon as input stage is followed to have the output resistance Ri close to 0, the error current signal for feedback is flowed through from Ri from the port V-
Outflow flows into.Error current forms voltage by being mirrored in the gain impedance Z (s) of the second level.Current feedback operational amplifier
The second level not instead of voltage gain G, mutual resistance gain Z (s), this is because amplifier output is voltage, and error signal is electricity
Stream only realizes that I-V is converted by mutual resistance.Rg and Rf is the feedback network resistance for setting gain, with voltage feedback type
Amplifier is similar.
Bipolar amplifier is widely used in wireless communication system, in High power amplifier circuits design, just faces function
The problem of linearity and efficiency of rate amplifier, due to the presence of amplitude modulation, so that power amplifier can not be always at
The state of maximum linear power output, it is necessary to be in back-off state, that is, power amplifier will not work in high efficiency
State.Meanwhile power amplifier is as a power device, it is non-linear to dramatically increase with the increase of output power, when
After modulated signal with certain bandwidth passes through power amplifier, intermodulation component can be generated, spread spectrum is caused, to neighboring trace signal
Interference is formed, the bit error rate of reception system, the performance of degrading communication system are directly influenced.Therefore develop linear efficient height
Performance power amplifier is most important for modern wireless communication systems.
For the problems in the relevant technologies, currently no effective solution has been proposed.
Summary of the invention
For the problems in the relevant technologies, the present invention proposes a kind of adaptive ambipolar amplification with linear bias circuit
Device, to overcome above-mentioned technical problem present in existing the relevant technologies.
For this purpose, the specific technical solution that the present invention uses is as follows:
A kind of adaptive bipolar amplifier with linear bias circuit, including linear bias circuit, adaptive circuit
And bipolar amplifier, wherein the linear bias circuit is connect by the adaptive circuit with the bipolar amplifier.
Further, the linear bias circuit includes bias voltage input Vbias, resistance R1, resistance R2, resistance
R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, triode Q1, triode Q2, triode Q3, triode Q4, three
Pole pipe Q5, triode Q6, triode Q7, capacitor C1, capacitor C2 and positive pole VDD；
Wherein, the bias voltage input Vbias by the resistance R1 successively with the base stage of the triode Q1, institute
State one end connection of the base stage of triode Q2, the collector of the triode Q3 and the capacitor C1, the collection of the triode Q1
Electrode is successively connect with the collector of the positive pole VDD and the triode Q2, and the emitter of the triode Q2 passes through
The resistance R4 is connect with the base stage of the triode Q3, the other end point of the emitter of the triode Q3 and the capacitor C1
It is not grounded, the emitter of the triode Q1 is successively connect with one end of one end of the capacitor C2 and the resistance R2, institute
It states the other end of capacitor C2 and passes through the successively one end, described with the other end of the resistance R2, the resistance R5 the resistance R3
One end of one end of resistance R6, one end of the resistance R7 and the resistance R8 connects, the other end of the resistance R5 with it is described
The base stage of triode Q4 connects, and the other end of the resistance R6 is connect with the base stage of the triode Q5, and the resistance R7's is another
One end is connect with the base stage of the triode Q6, and the other end of the resistance R8 is connect with the base stage of the triode Q7, described
Emitter, the emitter of the triode Q6 and the hair of the triode Q7 of the emitter of triode Q4 and the triode Q5
Emitter-base bandgap grading is grounded respectively, the collector of the triode Q4 successively with the collector of the triode Q5, the triode Q6
One end of collector, the collector of the triode Q7 and the adaptive circuit connects.
Further, the area ratio of the triode Q1 and triode Q3 is 1: 1.
Further, the area ratio of the triode Q1 and triode Q2 is 1: 2-6.
Further, the resistance value of the resistance R2 is R2=R4/4.
Further, the adaptive circuit includes capacitor C3, capacitor C4, input terminal Input, microstrip line MLin1 and micro-
Band line MLin2, wherein the input terminal Input successively connects with one end of the capacitor C3 and one end of the microstrip line MLin1
Connect, the other end of the microstrip line MLin1 by the capacitor C4 successively with one end of the microstrip line MLin2 and described bipolar
The input terminal of type amplifier connects, the other end of the microstrip line MLin2 successively with the other end of the C3 and the triode
The collector of Q7 connects.
Further, the bipolar amplifier include resistance R9, resistance R10, resistance R11, resistance R12, resistance R13,
Resistance R14, triode Q8, triode Q9, triode Q10, triode Q11, triode Q12, triode Q13, triode Q14,
Triode Q15, triode Q16, triode Q17, triode Q18, triode Q19, pole A and output end Output；
Wherein, the base stage of the triode Q9 and the base stage of the triode Q10 are another with the capacitor C4 respectively
End connection, the collector of the triode Q9 are connect with power cathode GND, the collector and the power supply of the triode Q10
Positive VDD connection, the emitter of the triode Q9 successively base stage with the base stage of the triode Q13, the triode Q8
And the collector connection of the triode Q8, the emitter of the triode Q8 by the resistance R9 successively with the resistance
One end of R10, one end of the resistance R11, the collector of the triode Q18 and the positive pole VDD connection, the electricity
The other end of resistance R10 is connect with the emitter of the triode Q12, and the other end of the resistance R11 is with the triode Q16's
Emitter connection, the base stage of the triode Q12 successively current collection with the collector of the triode Q12, the triode Q13
The base stage of pole and the triode Q16 connection, the collector of the triode Q16 successively with the base stage of the triode Q18 and
One end of the pole A connects, the emitter of the triode Q18 successively with the emitter of the triode Q19 and described defeated
Outlet Output connection, the base stage of the triode Q19 are successively another with the collector of the triode Q17 and the pole A
One end connection, the collector of the triode Q19 successively one end, described with one end of the resistance R12, the resistance R13
One end of resistance R14 and the power cathode GND connection, the emitter of the other end of the resistance R14 and the triode Q17
Connection, the base stage of the triode Q17 successively with the base stage of the triode Q15, the collector of the triode Q15 and described
The collector of triode Q14 connects, and the resistance R13 is connect with the emitter of the triode Q15, the resistance R12 and institute
The emitter connection of triode Q12 is stated, the emitter of the triode Q14 is connect with the emitter of the triode Q13, described
The base stage of the triode Q14 successively collector and the triode with the emitter of the triode Q10, the triode Q11
The base stage of Q11 connects, and the emitter of the triode Q11 is connect with the other end of the resistance R12.
Further, the triode Q1 and the triode Q2, the triode Q3, the triode Q4, described three
Pole pipe Q5, the triode Q6, the triode Q7, the triode Q10, the triode Q11, the triode Q13, institute
Stating triode Q15, the triode Q17 and the triode Q18 is NPN triode, the triode Q8 and three pole
Pipe Q9, the triode Q12, the triode Q14, the triode Q16 and the triode Q19 are PNP triode.
The invention has the benefit that
(1), pass through the size of change constant-current source IDC, thus it is possible to vary radio-frequency power amplifier tube bias electric current, so that penetrating
Frequency power amplifier tube can select bias state according to the size of output power, can either meet linear requirements, and to power
Efficiency influences smaller.
(2), by being added to a coupled capacitor C4 and two sections of micro-strips on the basis of traditional linear biasing circuit
Line, adaptive linear biasing circuit can be such that the bias current of radio-frequency power amplifier unit fits with the raising of input power
Locality increases, and finally makes Power Amplifier Unit with the increase of input power and is in a relatively stable conducting
Horn shape state, to reach the optimal state of a linearity and efficiency.
(3), by setting linear bias circuit and adaptive circuit, so as to the line of significantly hoisting power amplifier
Property degree and efficiency.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of circuit of adaptive bipolar amplifier with linear bias circuit according to an embodiment of the present invention
Schematic diagram.
Fig. 2 is Current feedback operational amplifier schematic diagram.
In figure:
1, linear bias circuit；2, adaptive circuit；3, bipolar amplifier.
Specific embodiment
To further illustrate that each embodiment, the present invention are provided with attached drawing, these attached drawings are that the invention discloses one of content
Point, mainly to illustrate embodiment, and the associated description of specification can be cooperated to explain the operation principles of embodiment, cooperation ginseng
Examine these contents, those of ordinary skill in the art will be understood that other possible embodiments and advantages of the present invention, in figure
Component be not necessarily to scale, and similar component symbol is conventionally used to indicate similar component.
According to an embodiment of the invention, providing a kind of adaptive bipolar amplifier with linear bias circuit.
Now in conjunction with the drawings and specific embodiments, the present invention is further described, as shown in Figure 1, according to embodiments of the present invention
The adaptive bipolar amplifier with linear bias circuit, including linear bias circuit 1, adaptive circuit 2 and ambipolar
Amplifier 3, wherein the linear bias circuit 1 is connect by the adaptive circuit 2 with the bipolar amplifier 3.
With the aid of the technical scheme, by setting linear bias circuit and adaptive circuit, so as to significantly mention
The linearity and efficiency of power per liter amplifier.
In one embodiment, the linear bias circuit 1 includes bias voltage input Vbias, resistance R1, resistance
R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, triode Q1, triode Q2, triode Q3, three poles
Pipe Q4, triode Q5, triode Q6, triode Q7, capacitor C1, capacitor C2 and positive pole VDD；
Wherein, the bias voltage input Vbias by the resistance R1 successively with the base stage of the triode Q1, institute
State one end connection of the base stage of triode Q2, the collector of the triode Q3 and the capacitor C1, the collection of the triode Q1
Electrode is successively connect with the collector of the positive pole VDD and the triode Q2, and the emitter of the triode Q2 passes through
The resistance R4 is connect with the base stage of the triode Q3, the other end point of the emitter of the triode Q3 and the capacitor C1
It is not grounded, the emitter of the triode Q1 is successively connect with one end of one end of the capacitor C2 and the resistance R2, institute
It states the other end of capacitor C2 and passes through the successively one end, described with the other end of the resistance R2, the resistance R5 the resistance R3
One end of one end of resistance R6, one end of the resistance R7 and the resistance R8 connects, the other end of the resistance R5 with it is described
The base stage of triode Q4 connects, and the other end of the resistance R6 is connect with the base stage of the triode Q5, and the resistance R7's is another
One end is connect with the base stage of the triode Q6, and the other end of the resistance R8 is connect with the base stage of the triode Q7, described
Emitter, the emitter of the triode Q6 and the hair of the triode Q7 of the emitter of triode Q4 and the triode Q5
Emitter-base bandgap grading is grounded respectively, the collector of the triode Q4 successively with the collector of the triode Q5, the triode Q6
One end of collector, the collector of the triode Q7 and the adaptive circuit 2 connects.
In one embodiment, the area ratio of the triode Q1 and triode Q3 is 1: 1.
In one embodiment, the area ratio of the triode Q1 and triode Q2 is 1: 2-6.
In one embodiment, the resistance value of the resistance R2 is R2=R4/4.
In one embodiment, the adaptive circuit 2 includes capacitor C3, capacitor C4, input terminal Input, microstrip line
MLin1 and microstrip line MLin2, wherein the input terminal Input successively with one end of the capacitor C3 and the microstrip line
One end of MLin1 connects, and the other end of the microstrip line MLin1 is by the capacitor C4 successively with the microstrip line MLin2's
The connection of the input terminal of one end and the bipolar amplifier 3, the other end of the microstrip line MLin2 are successively another with the C3
The connection of the collector of end and the triode Q7.
In one embodiment, the bipolar amplifier 3 includes resistance R9, resistance R10, resistance R11, resistance R12, electricity
Hinder R13, resistance R14, triode Q8, triode Q9, triode Q10, triode Q11, triode Q12, triode Q13, three poles
Pipe Q14, triode Q15, triode Q16, triode Q17, triode Q18, triode Q19, pole A and output end Output；
Wherein, the base stage of the triode Q9 and the base stage of the triode Q10 are another with the capacitor C4 respectively
End connection, the collector of the triode Q9 are connect with power cathode GND, the collector and the power supply of the triode Q10
Positive VDD connection, the emitter of the triode Q9 successively base stage with the base stage of the triode Q13, the triode Q8
And the collector connection of the triode Q8, the emitter of the triode Q8 by the resistance R9 successively with the resistance
One end of R10, one end of the resistance R11, the collector of the triode Q18 and the positive pole VDD connection, the electricity
The other end of resistance R10 is connect with the emitter of the triode Q12, and the other end of the resistance R11 is with the triode Q16's
Emitter connection, the base stage of the triode Q12 successively current collection with the collector of the triode Q12, the triode Q13
The base stage of pole and the triode Q16 connection, the collector of the triode Q16 successively with the base stage of the triode Q18 and
One end of the pole A connects, the emitter of the triode Q18 successively with the emitter of the triode Q19 and described defeated
Outlet Output connection, the base stage of the triode Q19 are successively another with the collector of the triode Q17 and the pole A
One end connection, the collector of the triode Q19 successively one end, described with one end of the resistance R12, the resistance R13
One end of resistance R14 and the power cathode GND connection, the emitter of the other end of the resistance R14 and the triode Q17
Connection, the base stage of the triode Q17 successively with the base stage of the triode Q15, the collector of the triode Q15 and described
The collector of triode Q14 connects, and the resistance R13 is connect with the emitter of the triode Q15, the resistance R12 and institute
The emitter connection of triode Q12 is stated, the emitter of the triode Q14 is connect with the emitter of the triode Q13, described
The base stage of the triode Q14 successively collector and the triode with the emitter of the triode Q10, the triode Q11
The base stage of Q11 connects, and the emitter of the triode Q11 is connect with the other end of the resistance R12.
In one embodiment, the triode Q1 and the triode Q2, the triode Q3, the triode Q4,
The triode Q5, the triode Q6, the triode Q7, the triode Q10, the triode Q11, the triode
Q13, the triode Q15, the triode Q17 and the triode Q18 are NPN triode, the triode Q8 and institute
Stating triode Q9, the triode Q12, the triode Q14, the triode Q16 and the triode Q19 is PNP tri-
Pole pipe.
In conclusion by means of above-mentioned technical proposal of the invention, by the size for changing constant-current source IDC, thus it is possible to vary
Radio-frequency power amplifier tube bias electric current, so that radio-frequency power amplifier tube can select to bias according to the size of output power
State can either meet linear requirements, and influence on power efficiency smaller.On the basis of traditional linear biasing circuit
Radio-frequency power amplifier unit can be made by being added to a coupled capacitor C4 and two sections of microstrip lines, adaptive linear biasing circuit
Bias current suitably increase with the raising of input power, finally make Power Amplifier Unit with input power
Increase and be in a relatively stable angle of flow state, to reach the optimal state of a linearity and efficiency.
By setting linear bias circuit and adaptive circuit, so as to the linearity and efficiency of significantly hoisting power amplifier.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of adaptive bipolar amplifier with linear bias circuit, which is characterized in that including linear bias circuit
(1), adaptive circuit (2) and bipolar amplifier (3), wherein the linear bias circuit (1) passes through the adaptive circuit
(2) it is connect with the bipolar amplifier (3).
2. a kind of adaptive bipolar amplifier with linear bias circuit according to claim 1, which is characterized in that
The linear bias circuit (1) includes bias voltage input Vbias, resistance R1, resistance R2, resistance R3, resistance R4, resistance
R5, resistance R6, resistance R7, resistance R8, triode Q1, triode Q2, triode Q3, triode Q4, triode Q5, triode
Q6, triode Q7, capacitor C1, capacitor C2 and positive pole VDD；
Wherein, the bias voltage input Vbias by the resistance R1 successively with the base stage of the triode Q1, described three
One end of the base stage of pole pipe Q2, the collector of the triode Q3 and the capacitor C1 connects, the collector of the triode Q1
It is successively connect with the collector of the positive pole VDD and the triode Q2, the emitter of the triode Q2 passes through described
Resistance R4 is connect with the base stage of the triode Q3, and the emitter of the triode Q3 and the other end difference of the capacitor C1 are equal
Ground connection, the emitter of the triode Q1 are successively connect with one end of one end of the capacitor C2 and the resistance R2, the electricity
Hold C2 the other end by the resistance R3 successively with the other end of the resistance R2, one end of the resistance R5, the resistance
One end of one end of R6, one end of the resistance R7 and the resistance R8 connects, the other end of the resistance R5 and three pole
The base stage of pipe Q4 connects, and the other end of the resistance R6 is connect with the base stage of the triode Q5, the other end of the resistance R7
It is connect with the base stage of the triode Q6, the other end of the resistance R8 is connect with the base stage of the triode Q7, three pole
Emitter, the emitter of the triode Q6 and the emitter of the triode Q7 of the emitter of pipe Q4 and the triode Q5
It is grounded respectively, the collector of the triode Q4 successively current collection with the collector of the triode Q5, the triode Q6
One end of pole, the collector of the triode Q7 and the adaptive circuit (2) connects.
3. a kind of adaptive bipolar amplifier with linear bias circuit according to claim 2, which is characterized in that
The area ratio of the triode Q1 and triode Q3 is 1: 1.
4. a kind of adaptive bipolar amplifier with linear bias circuit according to claim 3, which is characterized in that
The area ratio of the triode Q1 and triode Q2 is 1: 2-6.
5. a kind of adaptive bipolar amplifier with linear bias circuit according to claim 4, which is characterized in that
The resistance value of the resistance R2 is R2=R4/4.
6. a kind of adaptive bipolar amplifier with linear bias circuit according to claim 5, which is characterized in that
The adaptive circuit (2) includes capacitor C3, capacitor C4, input terminal Input, microstrip line MLin1 and microstrip line MLin2, wherein
The input terminal Input is successively connect with one end of one end of the capacitor C3 and the microstrip line MLin1, the microstrip line
The other end of MLin1 by the capacitor C4 successively with one end of the microstrip line MLin2 and the bipolar amplifier (3)
Input terminal connection, the other end of the microstrip line MLin2 successively collector with the other end of the C3 and the triode Q7
Connection.
7. a kind of adaptive bipolar amplifier with linear bias circuit according to claim 6, which is characterized in that
The bipolar amplifier (3) includes resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, triode
Q8, triode Q9, triode Q10, triode Q11, triode Q12, triode Q13, triode Q14, triode Q15, three poles
Pipe Q16, triode Q17, triode Q18, triode Q19, pole A and output end Output；
Wherein, the base stage of the triode Q9 and the base stage of the triode Q10 connect with the other end of the capacitor C4 respectively
It connects, the collector of the triode Q9 is connect with power cathode GND, the collector and the positive pole of the triode Q10
VDD connection, the emitter of the triode Q9 successively with the base stage of the triode Q13, the base stage of the triode Q8 and institute
The collector connection of triode Q8 is stated, the emitter of the triode Q8 is by the resistance R9 successively with the resistance R10's
One end, one end of the resistance R11, the collector of the triode Q18 and the positive pole VDD connection, the resistance R10
The other end connect with the emitter of the triode Q12, the transmitting of the other end of the resistance R11 and the triode Q16
Pole connection, the base stage of the triode Q12 successively with the collector of the triode Q12, the triode Q13 collector and
The base stage of the triode Q16 connects, the collector of the triode Q16 successively with the base stage of the triode Q18 and described
One end of pole A connects, the emitter of the triode Q18 successively with the emitter and the output end of the triode Q19
Output connection, the base stage of the triode Q19 successively other end with the collector of the triode Q17 and the pole A
Connection, the collector of the triode Q19 successively with one end of the resistance R12, one end of the resistance R13, the resistance
The emitter of one end of R14 and the power cathode GND connection, the other end of the resistance R14 and the triode Q17 connect
Connect, the base stage of the triode Q17 successively with the base stage of the triode Q15, the collector of the triode Q15 and described three
The collector of pole pipe Q14 connects, and the resistance R13 is connect with the emitter of the triode Q15, the resistance R12 with it is described
The emitter of triode Q12 connects, and the emitter of the triode Q14 is connect with the emitter of the triode Q13, and described three
The base stage of the pole pipe Q14 successively collector and the triode Q11 with the emitter of the triode Q10, the triode Q11
Base stage connection, the emitter of the triode Q11 connect with the other end of the resistance R12.
8. a kind of adaptive bipolar amplifier with linear bias circuit according to claim 7, which is characterized in that
The triode Q1 and the triode Q2, the triode Q3, the triode Q4, the triode Q5, the triode
It is Q6, the triode Q7, the triode Q10, the triode Q11, the triode Q13, the triode Q15, described
The triode Q17 and triode Q18 is NPN triode, the triode Q8 and the triode Q9, the triode
Q12, the triode Q14, the triode Q16 and the triode Q19 are PNP triode.
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| CN201910427075.0A CN110166008A (en) | 2019-05-22 | 2019-05-22 | A kind of adaptive bipolar amplifier with linear bias circuit |
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| CN201910427075.0A CN110166008A (en) | 2019-05-22 | 2019-05-22 | A kind of adaptive bipolar amplifier with linear bias circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111258846A (en) * | 2020-01-09 | 2020-06-09 | 澋芯微电子(重庆)有限公司 | Sensor for temperature monitoring based on Linux operating system |
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| CN111258846A (en) * | 2020-01-09 | 2020-06-09 | 澋芯微电子(重庆)有限公司 | Sensor for temperature monitoring based on Linux operating system |
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Application publication date: 20190823 |
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