CN204578487U - A kind of audio-frequency power amplifier - Google Patents
A kind of audio-frequency power amplifier Download PDFInfo
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- CN204578487U CN204578487U CN201520462684.7U CN201520462684U CN204578487U CN 204578487 U CN204578487 U CN 204578487U CN 201520462684 U CN201520462684 U CN 201520462684U CN 204578487 U CN204578487 U CN 204578487U
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- 230000005236 sound signal Effects 0.000 claims abstract description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The utility model discloses a kind of audio-frequency power amplifier, comprise chip U1, resistance R1, electric capacity C1, potentiometer RP1, inductance L 1 and resistance R6, potentiometer RP1 one end connects audio signal input end Vi, potentiometer RP1 other end ground connection, potentiometer RP1 slide plate connects electric capacity C1, the electric capacity C1 other end connects earth resistance R2 and resistance R1 respectively, the resistance R1 other end connects chip U1 pin 8, chip U1 pin 2 connects ground capacity C2 and power supply VCC respectively, chip U1 pin 7 is contact resistance R3 and resistance R4 respectively, the resistance R3 other end connects ground capacity C4, the resistance R4 other end is contact resistance R5 respectively, chip U1 pin 3, resistance R6 and inductance L 1.L1, R6 is adopted to provide high resistant to high frequency in the utility model audio-frequency power amplifier, low impedance path is provided to low frequency, for preventing high-frequency self-excitation, the peak voltage clamper that inductance L 1 can produce because of leakage inductance by diode D1 and diode D2 is to safety value, improve stability, circuit structure is simple, and cost is low, and volume is little.
Description
Technical field
The utility model relates to a kind of power amplifier, specifically a kind of audio-frequency power amplifier.
Background technology
Power amplifier is called for short power amplifier, and refer under given distortion rate condition, can produce maximum power output to drive the amplifier of load, the application of power amplifier in household electrical appliances, digital product serves pivotal role, with our daily life close relation.
But traditional power amplification circuit also exists following deficiency when processing small-signal: 1. the high-end instability of audio-frequency power amplifier frequency; 2. circuit structure is complicated, and cost is high.
Utility model content
The purpose of this utility model is to provide that the high-end stability of a kind of frequency is strong, the simple audio-frequency power amplifier of circuit structure, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of audio-frequency power amplifier, comprise chip U1, resistance R1, electric capacity C1, potentiometer RP1, inductance L 1 and resistance R6, described potentiometer RP1 one end connects audio signal input end Vi, potentiometer RP1 other end ground connection, potentiometer RP1 slide plate connects electric capacity C1, the electric capacity C1 other end connects earth resistance R2 and resistance R1 respectively, the resistance R1 other end connects chip U1 pin 8, chip U1 pin 2 connects ground capacity C2 and power supply VCC respectively, chip U1 pin 7 is contact resistance R3 and resistance R4 respectively, the resistance R3 other end connects ground capacity C4, the resistance R4 other end is contact resistance R5 respectively, chip U1 pin 3, resistance R6 and inductance L 1, the resistance R5 other end connects ground capacity C5, chip U1 pin 4 connects power vd D and ground capacity C3 respectively, the resistance R6 other end connects inductance L 1 other end respectively, diode D1 positive pole and buzzer B, diode D1 negative pole connects diode D2 negative pole, diode D2 positive pole connects the buzzer B other end and ground connection.
As further program of the utility model: described diode D2 is voltage stabilizing didoe.
As the utility model further scheme: described chip U1 model is LM4730.
Compared with prior art, the beneficial effects of the utility model are: adopt L1, R6 to provide high resistant to high frequency in the utility model audio-frequency power amplifier, low impedance path is provided to low frequency, for preventing high-frequency self-excitation, the peak voltage clamper that inductance L 1 can produce because of leakage inductance by diode D1 and diode D2 is to safety value, and improve stability, circuit structure is simple, cost is low, and volume is little.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of audio-frequency power amplifier.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of audio-frequency power amplifier, comprise chip U1, resistance R1, electric capacity C1, potentiometer RP1, inductance L 1 and resistance R6, potentiometer RP1 one end connects audio signal input end Vi, potentiometer RP1 other end ground connection, potentiometer RP1 slide plate connects electric capacity C1, the electric capacity C1 other end connects earth resistance R2 and resistance R1 respectively, the resistance R1 other end connects chip U1 pin 8, chip U1 pin 2 connects ground capacity C2 and power supply VCC respectively, chip U1 pin 7 is contact resistance R3 and resistance R4 respectively, the resistance R3 other end connects ground capacity C4, the resistance R4 other end is contact resistance R5 respectively, chip U1 pin 3, resistance R6 and inductance L 1, the resistance R5 other end connects ground capacity C5, chip U1 pin 4 connects power vd D and ground capacity C3 respectively, the resistance R6 other end connects inductance L 1 other end respectively, diode D1 positive pole and buzzer B, diode D1 negative pole connects diode D2 negative pole, diode D2 positive pole connects the buzzer B other end and ground connection.
Diode D2 is voltage stabilizing didoe.
Chip U1 model is LM4730.
Operation principle of the present utility model is: refer to Fig. 1, audio signal is added to input 8 pin of LM4730 from audio signal input end Vi input after potentiometer RP1, electric capacity C1 and resistance R1, exported by 3 pin after amplification, loud speaker is delivered to through inductance L 1 and resistance R6, RP1 is volume potentiometer, for regulating volume; Resistance R2, for arranging amp DC offset operation point, forms input high pass filter with electric capacity C1 simultaneously; Resistance R5 and electric capacity C5 is for reducing the high-end unsteadiness of amplifier frequency; L1, R6 provide high resistant to high frequency, provide low impedance path to low frequency, and for preventing high-frequency self-excitation, the peak voltage clamper that inductance L 1 can produce because of leakage inductance by diode D1 and diode D2, to safety value, improves stability.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.
Claims (3)
1. an audio-frequency power amplifier, comprise chip U1, resistance R1, electric capacity C1, potentiometer RP1, inductance L 1 and resistance R6, it is characterized in that, described potentiometer RP1 one end connects audio signal input end Vi, potentiometer RP1 other end ground connection, potentiometer RP1 slide plate connects electric capacity C1, the electric capacity C1 other end connects earth resistance R2 and resistance R1 respectively, the resistance R1 other end connects chip U1 pin 8, chip U1 pin 2 connects ground capacity C2 and power supply VCC respectively, chip U1 pin 7 is contact resistance R3 and resistance R4 respectively, the resistance R3 other end connects ground capacity C4, the resistance R4 other end is contact resistance R5 respectively, chip U1 pin 3, resistance R6 and inductance L 1, the resistance R5 other end connects ground capacity C5, chip U1 pin 4 connects power vd D and ground capacity C3 respectively, the resistance R6 other end connects inductance L 1 other end respectively, diode D1 positive pole and buzzer B, diode D1 negative pole connects diode D2 negative pole, diode D2 positive pole connects the buzzer B other end and ground connection.
2. audio-frequency power amplifier according to claim 1, is characterized in that, described diode D2 is voltage stabilizing didoe.
3. audio-frequency power amplifier according to claim 1, is characterized in that, described chip U1 model is LM4730.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520462684.7U CN204578487U (en) | 2015-06-27 | 2015-06-27 | A kind of audio-frequency power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520462684.7U CN204578487U (en) | 2015-06-27 | 2015-06-27 | A kind of audio-frequency power amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204578487U true CN204578487U (en) | 2015-08-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520462684.7U Expired - Fee Related CN204578487U (en) | 2015-06-27 | 2015-06-27 | A kind of audio-frequency power amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204578487U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105241517A (en) * | 2015-11-20 | 2016-01-13 | 成都科瑞信科技有限责任公司 | Simple oil consumption tester based on temperature detecting and signal filtering |
| CN105466508A (en) * | 2015-11-20 | 2016-04-06 | 成都科瑞信科技有限责任公司 | Simple oil consumption tester based on signal filtering processing |
| CN105955211A (en) * | 2016-04-28 | 2016-09-21 | 中北大学 | Rotor unmanned aerial vehicle control system |
-
2015
- 2015-06-27 CN CN201520462684.7U patent/CN204578487U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105241517A (en) * | 2015-11-20 | 2016-01-13 | 成都科瑞信科技有限责任公司 | Simple oil consumption tester based on temperature detecting and signal filtering |
| CN105466508A (en) * | 2015-11-20 | 2016-04-06 | 成都科瑞信科技有限责任公司 | Simple oil consumption tester based on signal filtering processing |
| CN105955211A (en) * | 2016-04-28 | 2016-09-21 | 中北大学 | Rotor unmanned aerial vehicle control system |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150819 Termination date: 20160627 |