CN209201020U - A kind of integrated operational amplifier circuit for audio player - Google Patents
A kind of integrated operational amplifier circuit for audio player Download PDFInfo
- Publication number
- CN209201020U CN209201020U CN201822117698.1U CN201822117698U CN209201020U CN 209201020 U CN209201020 U CN 209201020U CN 201822117698 U CN201822117698 U CN 201822117698U CN 209201020 U CN209201020 U CN 209201020U
- Authority
- CN
- China
- Prior art keywords
- circuit
- transistor
- total radio
- amplifier
- quasi
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Amplifiers (AREA)
Abstract
The utility model discloses a kind of integrated operational amplifier circuits for audio player, comprising: differential input stage circuit, for inhibiting temperature drift and as first order amplifying circuit；The quiescent point of circuits at different levels is arranged for providing bias current to circuits at different levels in biasing circuit, including the first Wilson's current source circuit, the second Wilson's current source circuit and third Wilson's current source circuit；Total radio amplifier, the main amplifying circuit as integrated transporting discharging；Quasi- complementary output grade circuit improves carrying load ability for reducing the output signal distortion factor；The differential input stage circuit includes total collection-total radio amplifier, and the total collection-total radio amplifier includes transistor T9~T15, wherein transistor T9, T11 and transistor T10, T12 respectively constitute compound PNP pipe.The utility model can not only make the quiescent point of circuits at different levels mutually indepedent, be independent of each other, and can also effectively reduce the distortion factor of audio signal.
Description
Technical field
The utility model relates to Analogical Circuit Technique field, especially a kind of integrated transporting discharging electricity for audio player
Road.
Background technique
As the improvement of people's living standards, the musical qualities that people export audio player have higher chase after
It asks, the pursuit just because of consumer to high-quality music, so that lossless compressiong is more favored by people, thus using lossless
The source of sound of compression is also more welcomed by the people；And the integrated operational amplifier circuit in existing audio player cannot be very well by audio signal
Amplify, be easy to be distorted in amplification process, thus the quality for audio player it is difficult to ensure that, this is to numerous
The user of audio player brings many puzzlements, therefore needs to research and develop a kind of quiescent point phase that can not only make circuits at different levels
It is mutually independent, it is independent of each other, but also the integrated operational amplifier circuit of the audio player of the distortion factor of audio signal can be effectively reduced.
Utility model content
In view of the deficiencies of the prior art, the utility model provides a kind of integrated operational amplifier circuit for audio player,
The quiescent point of circuits at different levels can not only be made mutually indepedent, be independent of each other, and can also effectively reduce the mistake of audio signal
True degree.
The utility model solves its technical problem and adopts the following technical solutions to achieve:
A kind of integrated operational amplifier circuit for audio player, comprising:
Differential input stage circuit, for inhibiting temperature drift and as first order amplifying circuit；
Biasing circuit, including the first Wilson's current source circuit, the second Wilson's current source circuit and third Wilson's electricity
The quiescent point of circuits at different levels is arranged for providing bias current to circuits at different levels in current source circuit；
Total radio amplifier, the main amplifying circuit as integrated transporting discharging；
Quasi- complementary output grade circuit improves carrying load ability for reducing the output signal distortion factor；
The differential input stage circuit includes total collection-total radio amplifier, and the total collection-total radio amplifier includes crystal
Pipe T9~T15, wherein transistor T9, T11 and transistor T10, T12 respectively constitute compound PNP pipe, and constitute collection amplification altogether
Circuit, transistor T10, T12 constitute total radio amplifier；
The total radio amplifier includes transistor T17, T18, and described transistor T17, T18 form compound NPN pipe；
The quasi- complementary output grade circuit includes UBE multiple circuit and complementary output circuit, and the UBE multiple circuit is available
In eliminating intermodulation distortion and carrying out temperature-compensating, the UBE multiple circuit includes resistance R3, R4 and transistor T19, the complementation
Output circuit includes transistor T20~T23, wherein and described transistor T20, T21 form compound NPN and manage, transistor T22,
T23 forms compound PNP pipe；
The differential input stage circuit is connected with total radio amplifier by resistance coupling method, for believing difference-mode input
Number carry out first order amplification, be then sent to total radio amplifier carry out second level amplification；The total radio amplifier is complementary with standard
Output-stage circuit is connected by resistance coupling method, for amplified signal is undistorted by quasi- complementary output grade circuit
Carry out export, the quasi- complementary output grade circuit is connected with player, for playing out amplified final signal；
The first Wilson's current source circuit is connected with differential input stage circuit, for mentioning to differential input stage circuit
For bias current, the second Wilson's current source circuit is connected with total radio amplifier, for mentioning to total radio amplifier
For bias current, the third Wilson's current source circuit is connected with quasi- complementary output grade circuit, for quasi- complementary output
Grade circuit provides bias current.
Preferably, the base stage of the transistor T9 and collector are connected with the emitter of transistor T11, the transistor
The base stage and collector of T10 is connected with the emitter of transistor T12.
Preferably, the total radio amplifier is connected with the second Wilson's current source circuit by resistance R2, the resistance
R2 is used to convert the variation of collector current to the variation of voltage.
Preferably, the total radio amplifier is connected with quasi- complementary output grade circuit by capacitor C2, so that cascode is put
DC channel between big circuit and quasi- complementary output grade circuit is respectively not communicated with, and guarantees total radio amplifier and quasi- complementary output grade
The quiescent point of circuit is mutually indepedent.
Preferably, the differential input stage circuit is connected with total radio amplifier by capacitor C1, so that cascode amplification electricity
DC channel between road and differential input stage circuit is respectively not communicated with, and guarantees the quiet of total radio amplifier and differential input stage circuit
State operating point is mutually indepedent.
Compared with prior art, the utility model embodiment bring it is following the utility model has the advantages that
1, the integrated operational amplifier circuit includes biasing circuit, and biasing circuit includes the first Wilson's current source circuit, the second prestige
Circuits at different levels are arranged for giving circuits at different levels offer bias current in the inferior current source circuit of that and third Wilson's current source circuit
Quiescent point, independent biasing circuit can make the quiescent point of circuits at different levels be independent of each other；Meanwhile biasing circuit is adopted
It can guarantee the highly stable performance of bias currents at different levels with Wilson's current source circuit, and can be bias current by three poles
The influence of pipe amplification factor variation is preferably minimized.
2, the integrated operational amplifier circuit includes differential input stage circuit, and differential input stage circuit includes total collection-cascode amplification electricity
Road, transistor T9, T11 and transistor T10, T12 respectively constitute compound PNP pipe, and constitute common-collector amplifier, by transistor
The multiple tube of composition has very high current amplification factor, while can also reduce the requirement to driving current, moreover, difference is defeated
Common mode input signal can also effectively be inhibited by entering grade circuit, and can effectively reduce the influence of temperature rise.
3, total radio amplifier is connected with quasi- complementary output grade circuit by capacitor C2, so that total radio amplifier and standard
DC channel between complementary output grade circuit is respectively not communicated with, and guarantees the static state of total radio amplifier and quasi- complementary output grade circuit
Operating point is mutually indepedent；Differential input stage circuit is connected with total radio amplifier by capacitor C1 so that total radio amplifier with
DC channel between differential input stage circuit is respectively not communicated with, and guarantees the static work of total radio amplifier and differential input stage circuit
It is mutually indepedent to make point, is independent of each other, effectively reduces the distortion factor of audio signal.
4, the integrated operational amplifier circuit includes quasi- complementary output grade circuit, and quasi- complementary output grade circuit includes UBE multiple circuit
With complementary output circuit, wherein UBE multiple circuit can effectively eliminate intermodulation distortion, while can also carry out a degree of temperature
Degree compensation, complementary output circuit have very strong carrying load ability, and it is symmetrical to export positive and negative direction, two-way to follow, can be undistorted
Audio signal is exported.
Detailed description of the invention
Fig. 1 is a kind of circuit diagram of the integrated operational amplifier circuit for audio player of the utility model；
Fig. 2 is the circuit of Wilson's current source in a kind of integrated operational amplifier circuit for audio player of the utility model
Figure；
Fig. 3 is the circuit of differential input stage circuit in a kind of integrated operational amplifier circuit for audio player of the utility model
Figure；
Fig. 4 is the circuit diagram of UBE multiple circuit in a kind of integrated operational amplifier circuit for audio player of the utility model；
Fig. 5 is the circuit of total radio amplifier in a kind of integrated operational amplifier circuit for audio player of the utility model
Figure；
Fig. 6 is the electricity of quasi- complementary output grade circuit in a kind of integrated operational amplifier circuit for audio player of the utility model
Lu Tu.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Fig. 1-6 is please referred to, a kind of embodiment provided by the utility model: a kind of integrated transporting discharging electricity for audio player
Road, comprising: differential input stage circuit, for inhibiting temperature drift and as first order amplifying circuit；Biasing circuit, including the first Weir
Inferior current source circuit, the second Wilson's current source circuit and third Wilson's current source circuit, it is inclined for being provided to circuits at different levels
Electric current is set, the quiescent point of circuits at different levels is set；Total radio amplifier, the main amplifying circuit as integrated transporting discharging；It is quasi- mutual
Output-stage circuit is mended, for reducing the output signal distortion factor, improves carrying load ability；The differential input stage circuit includes altogether
Collection-total radio amplifier, the total collection-total radio amplifier includes transistor T9~T15, wherein transistor T9, T11 and crystalline substance
Body pipe T10, T12 respectively constitute compound PNP pipe, and constitute common-collector amplifier, and transistor T10, T12 constitute cascode amplification electricity
Road；The total radio amplifier includes transistor T17, T18, and described transistor T17, T18 form compound NPN pipe；The standard
Complementary output grade circuit includes UBE multiple circuit and complementary output circuit, and the UBE multiple circuit can be used for eliminating intermodulation distortion
With progress temperature-compensating, the UBE multiple circuit includes resistance R3, R4 and transistor T19, and the complementary output circuit includes crystalline substance
Body pipe T20~T23, wherein described transistor T20, T21 form compound NPN pipe, and transistor T22, T23 form compound PNP
Pipe；The differential input stage circuit is connected with total radio amplifier by resistance coupling method, for by differential input signal into
The amplification of the row first order is then sent to total radio amplifier and carries out second level amplification；The total radio amplifier and quasi- complementary output
Grade circuit be connected by resistance coupling method, for by amplified signal by quasi- complementary output grade circuit it is distortionless into
Row output, the quasi- complementary output grade circuit is connected with player, for playing out amplified final signal；Described
One Wilson's current source circuit is connected with differential input stage circuit, for providing bias current, institute to differential input stage circuit
It states the second Wilson's current source circuit to be connected with total radio amplifier, for providing bias current, institute to total radio amplifier
It states third Wilson's current source circuit to be connected with quasi- complementary output grade circuit, for providing biasing to quasi- complementary output grade circuit
Electric current；The base stage and collector of the transistor T9 is connected with the emitter of transistor T11.
The base stage and collector of the transistor T10 is connected with the emitter of transistor T12；The total radio amplifier
It is connected with the second Wilson's current source circuit by resistance R2, the resistance R2 is used to convert electricity for the variation of collector current
The variation of pressure；The total radio amplifier is connected with quasi- complementary output grade circuit by capacitor C2, so that total radio amplifier
DC channel between quasi- complementary output grade circuit is respectively not communicated with, and guarantees total radio amplifier and quasi- complementary output grade circuit
Quiescent point is mutually indepedent；The differential input stage circuit is connected with total radio amplifier by capacitor C1, so that cascode is put
DC channel between big circuit and differential input stage circuit is respectively not communicated with, and guarantees total radio amplifier and differential input stage circuit
Quiescent point it is mutually indepedent.
Working principle: the integrated operational amplifier circuit includes biasing circuit, biasing circuit include the first Wilson's current source circuit,
Second Wilson's current source circuit and third Wilson's current source circuit, for providing bias current to circuits at different levels, setting is each
The quiescent point of grade circuit, independent biasing circuit can make the quiescent point of circuits at different levels be independent of each other；Meanwhile it biasing
Circuit can guarantee the highly stable performance of bias currents at different levels using Wilson's current source circuit, and can be bias current
It is influenced to be preferably minimized by the variation of triode amplification factor；The integrated operational amplifier circuit includes differential input stage circuit, Differential Input
Grade circuit includes total collection-total radio amplifier, and transistor T9, T11 and transistor T10, T12 respectively constitute compound PNP pipe, and
Common-collector amplifier is constituted, the multiple tube being made of transistor has very high current amplification factor, while can also reduce pair
The requirement of driving current moreover, differential input stage circuit can also effectively inhibit common mode input signal, and can effectively reduce temperature
The influence risen；Total radio amplifier is connected with quasi- complementary output grade circuit by capacitor C2, so that total radio amplifier and standard
DC channel between complementary output grade circuit is respectively not communicated with, and guarantees the static state of total radio amplifier and quasi- complementary output grade circuit
Operating point is mutually indepedent；Differential input stage circuit is connected with total radio amplifier by capacitor C1 so that total radio amplifier with
DC channel between differential input stage circuit is respectively not communicated with, and guarantees the static work of total radio amplifier and differential input stage circuit
It is mutually indepedent to make point, is independent of each other, effectively reduces the distortion factor of audio signal；The integrated operational amplifier circuit includes quasi- complementary output
Grade circuit, quasi- complementary output grade circuit includes UBE multiple circuit and complementary output circuit, wherein UBE multiple circuit can effectively disappear
Except intermodulation distortion, while a degree of temperature-compensating can also be carried out, complementary output circuit has very strong carrying load ability,
It is symmetrical to export positive and negative direction, it is two-way to follow, distortionless audio signal can be exported.
As shown in Fig. 2, being the circuit diagram of Wilson's current source circuit, wherein IC6 is output electric current, the c-e series connection of T1 pipe
In the emitter of T6 pipe, since the equivalent resistance between c-e is very big, therefore enable to output electric current IC6 highly stable,
In, transistor T0, T1 are identical with the characteristic of T6, therefore IC1=IC0=IC, then the current equation of A point beSo the collector current of transistor T1In B point, by the electric current of resistance R1Arrangement can obtain
As β=10, IC6≈0.984IREven if, it is seen then that in amplification factor β very little, it is also assumed that IC6≈IR, so, output electricity
Stream IC6 is influenced very small by base current, guarantees the high stability of bias current.
As shown in figure 4, being the circuit diagram of UBE multiple circuit, UBE multiple circuit includes resistance R3, R4 and transistor T19,
Wherein, the expression formula of the voltage between the collector and emitter of transistor T19 isTherefore reasonably select R3 and R4, it can obtain the direct current of any multiple of UBE
Voltage, while the also temperature coefficient of any multiple of available PN junction, therefore can be used for carrying out temperature-compensating.
Finally, it should be noted that embodiment described above, only specific embodiment of the present utility model, to illustrate this
The technical solution of utility model, rather than its limitations, the protection scope of the utility model is not limited thereto, although referring to aforementioned
The utility model is described in detail in embodiment, those skilled in the art should understand that: it is any to be familiar with this skill
The technical staff in art field within the technical scope disclosed by the utility model, still can be to skill documented by previous embodiment
Art scheme modify or can readily occur in variation or equivalent replacement of some of the technical features；And these modifications,
Variation or replacement, the spirit and model of the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution
It encloses, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be wanted with the right
Subject to the protection scope asked.
Claims (5)
1. a kind of integrated operational amplifier circuit for audio player characterized by comprising
Differential input stage circuit, for inhibiting temperature drift and as first order amplifying circuit；
Biasing circuit, including the first Wilson's current source circuit, the second Wilson's current source circuit and third Wilson's current source
The quiescent point of circuits at different levels is arranged for providing bias current to circuits at different levels in circuit；
Total radio amplifier, the main amplifying circuit as integrated transporting discharging；
Quasi- complementary output grade circuit improves carrying load ability for reducing the output signal distortion factor；
The differential input stage circuit includes total collection-total radio amplifier, and the total collection-total radio amplifier includes transistor T9
~T15, wherein transistor T9, T11 and transistor T10, T12 respectively constitute compound PNP pipe, and constitute common-collector amplifier,
Transistor T10, T12 constitute total radio amplifier；
The total radio amplifier includes transistor T17, T18, and described transistor T17, T18 form compound NPN pipe；
The quasi- complementary output grade circuit includes UBE multiple circuit and complementary output circuit, and the UBE multiple circuit can be used for disappearing
Except intermodulation distortion and temperature-compensating is carried out, the UBE multiple circuit includes resistance R3, R4 and transistor T19, the complementary output
Circuit includes transistor T20~T23, wherein described transistor T20, T21 form compound NPN pipe, transistor T22, T23 group
At compound PNP pipe；
The differential input stage circuit is connected with total radio amplifier by resistance coupling method, for by differential input signal into
The amplification of the row first order is then sent to total radio amplifier and carries out second level amplification；The total radio amplifier and quasi- complementary output
Grade circuit be connected by resistance coupling method, for by amplified signal by quasi- complementary output grade circuit it is distortionless into
Row output, the quasi- complementary output grade circuit is connected with player, for playing out amplified final signal；
The first Wilson's current source circuit is connected with differential input stage circuit, inclined for providing to differential input stage circuit
Electric current is set, the second Wilson's current source circuit is connected with total radio amplifier, inclined for providing to total radio amplifier
Electric current is set, the third Wilson's current source circuit is connected with quasi- complementary output grade circuit, for quasi- complementary output grade electricity
Road provides bias current.
2. a kind of integrated operational amplifier circuit for audio player according to claim 1, which is characterized in that the crystal
The base stage and collector of pipe T9 is connected with the emitter of transistor T11, the base stage and collector of the transistor T10 with crystalline substance
The emitter of body pipe T12 is connected.
3. a kind of integrated operational amplifier circuit for audio player according to claim 1, which is characterized in that the cascode
Amplifying circuit is connected with the second Wilson's current source circuit by resistance R2, and the resistance R2 is used for the variation of collector current
It is converted into the variation of voltage.
4. a kind of integrated operational amplifier circuit for audio player according to claim 1, which is characterized in that the cascode
Amplifying circuit is connected with quasi- complementary output grade circuit by capacitor C2, so that total radio amplifier and quasi- complementary output grade circuit
Between DC channel be respectively not communicated with, guarantee total radio amplifier and quasi- complementary output grade circuit quiescent point it is mutually only
It is vertical.
5. a kind of integrated operational amplifier circuit for audio player according to claim 1, which is characterized in that the difference
Input stage circuit is connected with total radio amplifier by capacitor C1, so that between total radio amplifier and differential input stage circuit
DC channel is respectively not communicated with, and guarantees that the quiescent point of total radio amplifier and differential input stage circuit is mutually indepedent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822117698.1U CN209201020U (en) | 2018-12-17 | 2018-12-17 | A kind of integrated operational amplifier circuit for audio player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822117698.1U CN209201020U (en) | 2018-12-17 | 2018-12-17 | A kind of integrated operational amplifier circuit for audio player |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209201020U true CN209201020U (en) | 2019-08-02 |
Family
ID=67429544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822117698.1U Active CN209201020U (en) | 2018-12-17 | 2018-12-17 | A kind of integrated operational amplifier circuit for audio player |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209201020U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109450387A (en) * | 2018-12-17 | 2019-03-08 | 天津三源兴泰微电子技术有限公司 | A kind of integrated operational amplifier circuit for audio player |
-
2018
- 2018-12-17 CN CN201822117698.1U patent/CN209201020U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109450387A (en) * | 2018-12-17 | 2019-03-08 | 天津三源兴泰微电子技术有限公司 | A kind of integrated operational amplifier circuit for audio player |
| CN109450387B (en) * | 2018-12-17 | 2023-10-13 | 天津三源兴泰微电子技术有限公司 | Integrated operational amplifier circuit for audio player |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103338014A (en) | Operational amplifier circuits | |
| CN209201020U (en) | A kind of integrated operational amplifier circuit for audio player | |
| US7830210B2 (en) | Amplifier device | |
| CN101350605B (en) | Improved bipolar type variable gain amplifier with minimum gain control | |
| CN102045044A (en) | Comparator and A/D converter | |
| CN113992156A (en) | Low-input bias current amplifier | |
| CN203722582U (en) | Limiting amplifier for realizing direct-current maladjustment elimination function on chip | |
| CN109450387A (en) | A kind of integrated operational amplifier circuit for audio player | |
| CN114900139B (en) | Common-mode feedback circuit of fully differential operational amplifier | |
| CN205356278U (en) | MOS manages amplifier circuit | |
| CN107196612B (en) | A kind of push-pull amplifier with high gain characteristics | |
| CN201294487Y (en) | Low noise DC servo circuit | |
| CN208971475U (en) | A kind of audio-frequency power amplifier | |
| CN106712731B (en) | Operational amplifier | |
| CN208158550U (en) | A kind of HD Audio power amplification circuit | |
| CN113922768B (en) | Darlington tube high-fidelity audio power amplifier | |
| CN204794913U (en) | Operational amplifier | |
| CN219536282U (en) | Sound circuit | |
| CN204089740U (en) | A kind of digital audio power amplification circuit for color ultrasound | |
| CN113422582B (en) | High bandwidth linear variable gain amplifier | |
| CN103956980A (en) | Unrestrictive line voltage-following and power-buffering amplifier | |
| CN115833766A (en) | Quasi-complementary class B output stage circuit structure | |
| CN109347453A (en) | A kind of Full differential operational amplifier circuit structure of High Linear precision | |
| CN202261177U (en) | Transistor audio power amplifying circuit of low distortion transformer output | |
| CN217388659U (en) | Differential operational amplifier and chip |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |