CN103475977B - A kind of audio signal circuit - Google Patents
A kind of audio signal circuit Download PDFInfo
- Publication number
- CN103475977B CN103475977B CN201310407695.0A CN201310407695A CN103475977B CN 103475977 B CN103475977 B CN 103475977B CN 201310407695 A CN201310407695 A CN 201310407695A CN 103475977 B CN103475977 B CN 103475977B
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- resistance
- amplifier
- electric capacity
- diode
- triode
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Abstract
The invention discloses a kind of audio signal circuit, this circuit comprises amplifier, triode, variable resistor, resistance, electric capacity and diode; The present invention utilizes triode to be operated in variable resistor district, and form, nonlinear resistance is stable to be exported, by the variable resistor in regulating circuit, it is constant that the power of feeding back by adjusting maintains output voltage, therefore improved further the stable problem of output voltage amplitude, circuit structure of the present invention is simple, stable output signal, clutter is few, is applicable in small power electric subsystem.
Description
Technical field
The present invention relates to a kind of signal source circuit, particularly a kind of audio signal circuit.
Background technology
Signal source circuit is in the core unit circuit of Analogous Integrated Electronic Circuits, especially power management class chip, letterNumber source has often determined the performance indications of this type of chip, and it is widely used in oscillator, phaselocked loop and data transactionIn the various simulations such as device and hybrid digital-analog integrated circuit. But its circuit complexity, power consumption is large, is not easy to small-power systemSystem application.
Therefore need a kind of new technical scheme to solve the problems referred to above.
Summary of the invention
Goal of the invention: the problem and shortage existing for above-mentioned prior art, the object of this invention is to provide oneAudio signal circuit, its signal produces stable.
Technical scheme: the technical solution adopted in the present invention is a kind of audio signal circuit, and this circuit comprises fortunePut, triode, variable resistor, resistance, electric capacity and diode, the inverting input of amplifier is by the first resistanceBe connected with the colelctor electrode of triode, the base stage of triode is by the second resistance eutral grounding, its grounded emitter, amplifierInverting input be connected with first variable-resistance one end, the output of the first variable-resistance adjustable side and amplifierEnd is connected, and the output of this amplifier is connected with one end of the second adjustable resistance, and the adjustable side of the second adjustable resistance is logicalCross the 4th electric capacity and be connected with the normal phase input end of amplifier, the output of amplifier is connected with the positive pole of the 3rd diode,The negative pole of the 3rd diode is connected with the negative pole of the second diode, and the positive pole of the second diode is by the 3rd resistanceWith the series connection of the 4th resistance be connected with the base stage of triode, it is defeated that the output of amplifier and the 3rd electric capacity form signalGo out end.
Preferably, also comprise the first electric capacity, one end of described the first electric capacity is connected with the inverting input of amplifier,The other end ground connection of the first electric capacity.
Preferably, also comprise the second electric capacity, one of the link of the 3rd resistance and the 4th resistance and the second electric capacityEnd is connected, the other end ground connection of the second electric capacity.
Preferably, also comprise the first diode, the positive pole of the first diode is connected with one end of the second electric capacity,Its minus earth.
Beneficial effect: the present invention compared with prior art, its advantage be the present invention utilize triode to be operated in canBecome resistance area, and form the stable output of nonlinear resistance, by the variable resistor in regulating circuit, by regulatingIt is constant that the power of feedback maintains output voltage, thus improve further the stable problem of output voltage amplitude,Circuit structure of the present invention is simple, stable output signal, and clutter is few, is applicable in small power electric subsystem
Brief description of the drawings
Fig. 1 is circuit diagram of the present invention.
Detailed description of the invention
As shown in Figure 1, the present invention includes amplifier, triode, variable resistor, resistance, electric capacity and diode,The inverting input of amplifier U1 is connected with the colelctor electrode of triode Q1 by the first resistance R 1, triode Q1Base stage by the second resistance R 2 ground connection, its grounded emitter, the inverting input of amplifier U1 and first canOne end of power transformation resistance R5 is connected, and the adjustable side of the first variable resistor R5 is connected with the output of amplifier U1,The output of this amplifier U1 is connected with one end of the second adjustable resistance R6, the adjusting of the second adjustable resistance R6End is connected with the normal phase input end of amplifier U1 by the 4th capacitor C 4, the output of amplifier U1 and the 3rdThe positive pole of diode D3 is connected, the negative pole phase of the negative pole of the 3rd diode D3 and the second diode D2Connect, the positive pole of the second diode D2 by the series connection of the 3rd resistance R 3 and the 4th resistance R 4 with three utmost pointsThe base stage of pipe Q1 is connected, and the output of amplifier U1 and the 3rd capacitor C 3 form signal output part.
One end of the first capacitor C 1 is connected with the inverting input of amplifier U1, its other end ground connection, the 3rd electricityThe link of resistance R3 and the 4th resistance R 4 is connected with one end of the second capacitor C 2, another of the second capacitor C 2End ground connection, the positive pole of the first diode D1 is connected with one end of the second capacitor C 2, its minus earth.
The present invention utilizes triode to be operated in variable resistor district, and forms the stable output of nonlinear resistance, by adjustingVariable resistor in economize on electricity road, it is constant that the power of feeding back by adjusting maintains output voltage, therefore change furtherBe apt to the stable problem of output voltage amplitude, circuit structure of the present invention is simple, stable output signal, and clutter is few,Be applicable in small power electric subsystem.
Claims (4)
1. an audio signal circuit, is characterized in that: comprise amplifier, triode, variable resistor, electricityResistance, electric capacity and diode, the inverting input of described amplifier (U1) is by the first resistance (R1) and triode(Q1) colelctor electrode is connected, and the base stage of described triode (Q1) is passed through the second resistance (R2) ground connection, itsEmitter grounding, the inverting input of described amplifier (U1) is connected with one end of the first variable resistor (R5), instituteThe adjustable side of stating the first variable resistor (R5) is connected with the output of amplifier (U1), this amplifier (U1) defeatedGo out end and be connected with one end of the second adjustable resistance (R6), the adjustable side of described the second adjustable resistance (R6) is passed throughThe 4th electric capacity (C4) is connected with the normal phase input end of amplifier (U1), the output of described amplifier (U1) andThe positive pole of three diodes (D3) is connected, the negative pole of the 3rd diode (D3) and the second diode (D2)Negative pole is connected, and the positive pole of described the second diode (D2) is by the 3rd resistance (R3) and the 4th resistance (R4)Series connection be connected with the base stage of triode (Q1), the output of described amplifier (U1) and the 3rd electric capacity (C3)Form signal output part.
2. a kind of audio signal circuit according to claim 1, is characterized in that: also comprise the first electricityHold (C1), one end of described the first electric capacity (C1) is connected with the inverting input of amplifier (U1), the first electricityHold the other end ground connection of (C1).
3. a kind of audio signal circuit according to claim 1, is characterized in that: also comprise the second electricityHold (C2), the link of the 3rd resistance (R3) and the 4th resistance (R4) and described the second electric capacity (C2)One end is connected, the other end ground connection of the second electric capacity (C2).
4. a kind of audio signal circuit according to claim 3, is characterized in that: also comprise the one or twoUtmost point pipe (D1), the positive pole of described the first diode (D1) is connected with one end of the second electric capacity (C2), and it is negativeUtmost point ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310407695.0A CN103475977B (en) | 2013-09-10 | 2013-09-10 | A kind of audio signal circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310407695.0A CN103475977B (en) | 2013-09-10 | 2013-09-10 | A kind of audio signal circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103475977A CN103475977A (en) | 2013-12-25 |
| CN103475977B true CN103475977B (en) | 2016-05-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310407695.0A Expired - Fee Related CN103475977B (en) | 2013-09-10 | 2013-09-10 | A kind of audio signal circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN103475977B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106454630B (en) * | 2016-09-12 | 2021-01-19 | 深圳市冠旭电子股份有限公司 | Power control circuit based on audio amplifier output |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202494943U (en) * | 2012-02-23 | 2012-10-17 | 樱花卫厨（中国）股份有限公司 | Adjustable constant-voltage constant-current-source circuit |
| CN203057473U (en) * | 2013-01-05 | 2013-07-10 | 成都果范创想科技有限公司 | Active audio frequency amplifying circuit |
| CN203167252U (en) * | 2013-04-15 | 2013-08-28 | 成都瑞途电子有限公司 | Audio power overall-amplification circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6949977B2 (en) * | 2003-06-26 | 2005-09-27 | Siemens Medical Solutions, Usa | Circuit arrangement having a transimpedance amplifier connected to a current limiter circuit |
-
2013
- 2013-09-10 CN CN201310407695.0A patent/CN103475977B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202494943U (en) * | 2012-02-23 | 2012-10-17 | 樱花卫厨（中国）股份有限公司 | Adjustable constant-voltage constant-current-source circuit |
| CN203057473U (en) * | 2013-01-05 | 2013-07-10 | 成都果范创想科技有限公司 | Active audio frequency amplifying circuit |
| CN203167252U (en) * | 2013-04-15 | 2013-08-28 | 成都瑞途电子有限公司 | Audio power overall-amplification circuit |
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| Publication number | Publication date |
|---|---|
| CN103475977A (en) | 2013-12-25 |
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Effective date of registration: 20160426 Address after: 2 Building 3, 215300 Feng Lu, Zhenjiang, Suzhou, Jiangsu Applicant after: Kunshan Longshida Electronic Material Co.,Ltd. Address before: Suzhou City, Jiangsu Province, Kunshan City Zhang Pu Feng Zhenjiang Road No. 3 room 2 Applicant before: Kunshan Xinjinfu Precision Electronics Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160518 Termination date: 20160910 |