CN203563019U - Power amplification circuit for loudspeaker box loudspeaker - Google Patents
Power amplification circuit for loudspeaker box loudspeaker Download PDFInfo
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- CN203563019U CN203563019U CN201320735469.0U CN201320735469U CN203563019U CN 203563019 U CN203563019 U CN 203563019U CN 201320735469 U CN201320735469 U CN 201320735469U CN 203563019 U CN203563019 U CN 203563019U
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- resistance
- triode
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Abstract
The utility model discloses a power amplification circuit for a loudspeaker box loudspeaker. The power amplification circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a first polar capacitor, a second polar capacitor, a third polar capacitor, an operational amplifier, a first non-polarized capacitor, a second non-polarized capacitor, a third non-polarized capacitor, a fourth non-polarized capacitor, a first triode, a second triode, a third triode, a first diode, a second diode, a first direct current power supply and a second direct current power supply, wherein the operational amplifier, the third resistor, the fourth resistor and the fifth resistor form a first level amplification circuit, and the second triode, the third triode, the eleventh resistor, the twelfth resistor, the third polar capacitor and the third non-polarized capacitor form a second level amplification circuit. The power amplification circuit for the loudspeaker box loudspeaker is small in distortion, large in output power and efficiency, simple in structure, few in adopted parts, and suitable for a cheap loudspeaker box.
Description
Technical field
The utility model relates to a kind of power amplification circuit for speaker of voice box, for the high power amplification circuit of the little efficiency of distortion of speaker of voice box.
Background technology
Loud speaker is a kind of electro-acoustic transducer device, is commonly used in the electronic electric equipment of sounding, and required power amplifying circuit drives could sounding.Power amplification circuit is a kind of output relatively high power amplifying circuit that is object of take, and generally can directly drive load, and load capacity is eager to excel.At present, on market the power amplification circuit distortion of cheap audio amplifier larger, efficiency is lower.
Utility model content
The purpose of this utility model provides the little efficiency of a kind of distortion for speaker of voice box high power amplification circuit with regard to being in order to address the above problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
Power amplification circuit for speaker of voice box described in the utility model, comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the first polar capacitor, the second polar capacitor, the 3rd polar capacitor, operational amplifier, the first polarity free capacitor, the second polarity free capacitor, the 3rd polarity free capacitor, the 4th polarity free capacitor, the first triode, the second triode, the 3rd triode, the first diode, the second diode, the first DC power supply and the second DC power supply, the first end of described the first resistance is as the signal input part of described power amplification circuit, and the second end of described the first resistance is simultaneously and the first end of described the first polar capacitor, the first end of described the second resistance connects, the second end while of described the first polar capacitor and the first end of described the 3rd resistance, the in-phase input end of described operational amplifier connects, the inverting input while of described operational amplifier and the first end of described the 4th resistance, the first end of described the 5th resistance connects, and the second end of described the 4th resistance is connected with the first end of described the second polar capacitor, the power positive end while of described operational amplifier and the first end of described the first polarity free capacitor, the positive pole of described the first DC power supply connects, the extreme while of power-of described operational amplifier and the first end of described the second polarity free capacitor, the negative pole of described the second DC power supply connects, the output of described operational amplifier is connected with the first end of described the 6th resistance, the second end of described the 6th resistance is connected with the base stage of described the first triode, the collector electrode while of described the first triode and the first end of described the 7th resistance, the first end of described the 8th resistance, the first end of described the 3rd polarity free capacitor connects, and the emitter of described the first triode is connected with the first end of described the 9th resistance, the second end while of described the 9th resistance and the first end of described the tenth resistance, the base stage of described the second triode connects, the second end while of described the tenth resistance and the emitter of described the second triode, the negative pole of described the second DC power supply connects, the collector electrode while of described the second triode and the negative pole of described the first diode, the negative pole of described the second diode, the second end of described the 3rd polarity free capacitor connects, the anodal while of described the first diode and the first end of described the 11 resistance, the base stage of described the 3rd triode connects, the collector electrode while of described the 3rd triode and the positive pole of described the first DC power supply, the first end of described the 12 resistance connects, the second end while of described the 11 resistance and the second end of described the 12 resistance, the first end of described the 3rd polar capacitor connects, the second end while of described the second resistance and the second end of described the 3rd resistance, the second end of described the second polar capacitor, the second end of described the first polarity free capacitor, the second end of described the second polarity free capacitor, the first end of described the 4th polarity free capacitor, the negative pole of described the first DC power supply, the positive pole of described the second DC power supply connects, and the second end of described the 4th polarity free capacitor is connected with the first end of described the 13 resistance, the second end while of described the 5th resistance and the second end of described the 7th resistance, the second end of described the 3rd polar capacitor, the positive pole of described the second diode, the emitter of described the 3rd triode, the second end of described the 13 resistance connects and as the signal output part of described power amplification circuit.
The beneficial effects of the utility model are:
Power amplification circuit for speaker of voice box described in the utility model, distortion is little, and power output is large, and efficiency is high.The circuit structure of this power amplification circuit is simpler, uses components and parts less, is applicable to cheap audio amplifier.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the power amplification circuit for speaker of voice box described in the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Power amplification circuit for speaker of voice box described in the utility model, comprises the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10, the 11 resistance R 11, the 12 resistance R 12, the 13 resistance R 13, the first polar capacitor CP1, the second polar capacitor CP2, the 3rd polar capacitor CP3, operational amplifier A, the first polarity free capacitor CO1, the second polarity free capacitor CO2, the 3rd polarity free capacitor CO3, the 4th polarity free capacitor CO4, the first triode Q1, the second triode Q2, the 3rd triode Q3, the first diode D1, the second diode D2, the first DC power supply (in figure+15V power supply) and the second DC power supply (in figure-15V power supply), the first end of the first resistance R 1 is as the signal input part IN of power amplification circuit, and the second end of the first resistance R 1 is simultaneously and the first end of the first polar capacitor CP1, the first end of the second resistance R 2 connects, the second end while of the first polar capacitor CP1 and the first end of the 3rd resistance R 3, the in-phase input end of operational amplifier A connects, the inverting input while of operational amplifier A and the first end of the 4th resistance R 4, the first end of the 5th resistance R 5 connects, and the second end of the 4th resistance R 4 is connected with the first end of the second polar capacitor CP2, the power positive end while of operational amplifier A and the first end of the first polarity free capacitor CO1, the positive pole of the first DC power supply connects, the extreme while of power-of operational amplifier A and the first end of the second polarity free capacitor CO2, the negative pole of the second DC power supply connects, and the output of operational amplifier A is connected with the first end of the 6th resistance R 6, and the second end of the 6th resistance R 6 is connected with the base stage of the first triode Q1, the collector electrode while of the first triode Q1 and the first end of the 7th resistance R 7, the first end of the 8th resistance R 8, the first end of the 3rd polarity free capacitor CO3 connects, and the emitter of the first triode Q1 is connected with the first end of the 9th resistance R 9, the second end while of the 9th resistance R 9 and the first end of the tenth resistance R 10, the base stage of the second triode Q2 connects, the second end while of the tenth resistance R 10 and the emitter of the second triode Q2, the negative pole of the second DC power supply connects, the collector electrode while of the second triode Q2 and the negative pole of the first diode D1, the negative pole of the second diode D2, the second end of the 3rd polarity free capacitor CO3 connects, the anodal while of the first diode D1 and the first end of the 11 resistance R 11, the base stage of the 3rd triode Q3 connects, the collector electrode while of the 3rd triode Q3 and the positive pole of the first DC power supply, the first end of the 12 resistance R 12 connects, the second end while of the 11 resistance R 11 and the second end of the 12 resistance R 12, the first end of the 3rd polar capacitor CP3 connects, the second end while of the second resistance R 2 and the second end of the 3rd resistance R 3, the second end of the second polar capacitor CP2, the second end of the first polarity free capacitor CO1, the second end of the second polarity free capacitor CO2, the first end of the 4th polarity free capacitor CO4, the negative pole of the first DC power supply, the positive pole of the second DC power supply connects, and the second end of the 4th polarity free capacitor CO4 is connected with the first end of the 13 resistance R 13, the second end while of the 5th resistance R 5 and the second end of the 7th resistance R 7, the second end of the 3rd polar capacitor CP3, the positive pole of the second diode D2, the emitter of the 3rd triode Q3, the second end of the 13 resistance R 13 connects and as the signal output part OUT of power amplification circuit.
Power amplification circuit for speaker of voice box described in the utility model, operational amplifier A, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5 and the 6th resistance R 6 form first order amplifying circuit, and the second triode Q2, the 3rd triode Q3, the 11 resistance R the 11, the 12 resistance R 12, the 3rd polar capacitor CP3 and the 3rd polarity free capacitor CO3 form second level amplifying circuit.When AC signal is transported to the 3rd triode Q3, in the collector potential decline of the positive half cycle of signal the 3rd triode Q3, the second diode D2 conducting, connects loud speaker (not shown in FIG.); Collector potential at signal negative half period the 3rd triode Q3 raises, and the second diode D2 ends, and adds to the base stage of the second triode Q2 through the first diode D1, and loud speaker is connected in the second triode Q2 conducting.This power amplification circuit distortion is little, and efficiency is high.
Claims (1)
1. for a power amplification circuit for speaker of voice box, it is characterized in that: comprise the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the first polar capacitor, the second polar capacitor, the 3rd polar capacitor, operational amplifier, the first polarity free capacitor, the second polarity free capacitor, the 3rd polarity free capacitor, the 4th polarity free capacitor, the first triode, the second triode, the 3rd triode, the first diode, the second diode, the first DC power supply and the second DC power supply, the first end of described the first resistance is as the signal input part of described power amplification circuit, and the second end of described the first resistance is simultaneously and the first end of described the first polar capacitor, the first end of described the second resistance connects, the second end while of described the first polar capacitor and the first end of described the 3rd resistance, the in-phase input end of described operational amplifier connects, the inverting input while of described operational amplifier and the first end of described the 4th resistance, the first end of described the 5th resistance connects, and the second end of described the 4th resistance is connected with the first end of described the second polar capacitor, the power positive end while of described operational amplifier and the first end of described the first polarity free capacitor, the positive pole of described the first DC power supply connects, the extreme while of power-of described operational amplifier and the first end of described the second polarity free capacitor, the negative pole of described the second DC power supply connects, the output of described operational amplifier is connected with the first end of described the 6th resistance, the second end of described the 6th resistance is connected with the base stage of described the first triode, the collector electrode while of described the first triode and the first end of described the 7th resistance, the first end of described the 8th resistance, the first end of described the 3rd polarity free capacitor connects, and the emitter of described the first triode is connected with the first end of described the 9th resistance, the second end while of described the 9th resistance and the first end of described the tenth resistance, the base stage of described the second triode connects, the second end while of described the tenth resistance and the emitter of described the second triode, the negative pole of described the second DC power supply connects, the collector electrode while of described the second triode and the negative pole of described the first diode, the negative pole of described the second diode, the second end of described the 3rd polarity free capacitor connects, the anodal while of described the first diode and the first end of described the 11 resistance, the base stage of described the 3rd triode connects, the collector electrode while of described the 3rd triode and the positive pole of described the first DC power supply, the first end of described the 12 resistance connects, the second end while of described the 11 resistance and the second end of described the 12 resistance, the first end of described the 3rd polar capacitor connects, the second end while of described the second resistance and the second end of described the 3rd resistance, the second end of described the second polar capacitor, the second end of described the first polarity free capacitor, the second end of described the second polarity free capacitor, the first end of described the 4th polarity free capacitor, the negative pole of described the first DC power supply, the positive pole of described the second DC power supply connects, and the second end of described the 4th polarity free capacitor is connected with the first end of described the 13 resistance, the second end while of described the 5th resistance and the second end of described the 7th resistance, the second end of described the 3rd polar capacitor, the positive pole of described the second diode, the emitter of described the 3rd triode, the second end of described the 13 resistance connects and as the signal output part of described power amplification circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320735469.0U CN203563019U (en) | 2013-11-19 | 2013-11-19 | Power amplification circuit for loudspeaker box loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320735469.0U CN203563019U (en) | 2013-11-19 | 2013-11-19 | Power amplification circuit for loudspeaker box loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203563019U true CN203563019U (en) | 2014-04-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320735469.0U Expired - Fee Related CN203563019U (en) | 2013-11-19 | 2013-11-19 | Power amplification circuit for loudspeaker box loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203563019U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104320091A (en) * | 2014-11-13 | 2015-01-28 | 成都爱斯顿测控技术有限公司 | Power amplifying circuit for computer speaker |
| CN104953955A (en) * | 2015-06-05 | 2015-09-30 | 苏州经贸职业技术学院 | Amplifier circuit of three-level amplifying structure |
-
2013
- 2013-11-19 CN CN201320735469.0U patent/CN203563019U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104320091A (en) * | 2014-11-13 | 2015-01-28 | 成都爱斯顿测控技术有限公司 | Power amplifying circuit for computer speaker |
| CN104953955A (en) * | 2015-06-05 | 2015-09-30 | 苏州经贸职业技术学院 | Amplifier circuit of three-level amplifying structure |
| CN104953955B (en) * | 2015-06-05 | 2018-05-08 | 苏州经贸职业技术学院 | A kind of amplifier circuit of three-level structure for amplifying |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140423 Termination date: 20141119 |
|
| EXPY | Termination of patent right or utility model |