CN204206116U - A kind of audio-frequency power amplifier for multimedia electronic equipment - Google Patents
A kind of audio-frequency power amplifier for multimedia electronic equipment Download PDFInfo
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- CN204206116U CN204206116U CN201420658898.7U CN201420658898U CN204206116U CN 204206116 U CN204206116 U CN 204206116U CN 201420658898 U CN201420658898 U CN 201420658898U CN 204206116 U CN204206116 U CN 204206116U
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- resistance
- electric capacity
- potentiometer
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Abstract
The utility model discloses a kind of audio-frequency power amplifier for multimedia electronic equipment, comprise DC power supply, audio input port, first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance, 7th resistance, 8th resistance, 9th resistance, tenth resistance, first potentiometer, second potentiometer, 3rd potentiometer, first electric capacity, second electric capacity, 3rd electric capacity, 4th electric capacity, 5th electric capacity, 6th electric capacity, 7th electric capacity, amplifier and loud speaker, the utility model is by bass control circuit, high pitch control circuit and amplifying circuit composition, volume is controlled by corresponding potentiometer, circuit has the advantages that to prevent amplifier from producing low frequency self-excitation, and circuit structure is simple, element is few, cost is low, strong interference immunity, working stability, the amplifying signal distortion factor is low, be conducive to universal and promote.
Description
Technical field
The utility model relates to a kind of television set device, particularly relates to a kind of audio-frequency power amplifier for multimedia electronic equipment.
Background technology
Audio-frequency power amplifier is for promoting loud speaker sounding, thus the power amplification device of reproduced sound, all to use it in the electronic product of every sounding.After entering 21 century, along with the continuous maturation of multimedia technology and electronic technology, the appearance of various portable electronic equipment becomes a kind of important channel that multimedia technology is propagated.From the mobile phone as means of communication, to the MP3 player as amusement equipment, become the similar portable electric appts that everybody possesses, that will popularize successively also has portable television, portable DVD player etc.A common ground of all these portable electronic equipments, be exactly have audio frequency to export, namely all need an audio-frequency power amplifier, but, many audio power amplifier circuit complex structures for portable electric appts, element is many, cost is high, anti-interference is poor, job insecurity, the amplifying signal distortion factor is high, is difficult to universal and promotes.
Utility model content
The purpose of this utility model is just to provide a kind of audio-frequency power amplifier for portable electric appts to solve the problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The utility model comprises DC power supply, audio input port, first resistance is to the tenth resistance, first potentiometer is to the 3rd potentiometer, first electric capacity is to the 7th electric capacity, amplifier and loud speaker, described audio input port connects the first end of described first resistance, second end of described first resistance connects the first end of described first potentiometer, the sliding end of described first potentiometer simultaneously with the first end of described second resistance and the first end of described 3rd electric capacity, second end of described second resistance is connected with the first end of described second potentiometer and the first end of described second electric capacity simultaneously, second end of described second potentiometer is connected with the first end of described 3rd resistance and the first end of described first electric capacity simultaneously, second end of described first electric capacity simultaneously with the first end of described 4th resistance, the sliding end of described second potentiometer is connected with the second end of described second electric capacity, second end of described 4th resistance is connected with the sliding end of described 3rd potentiometer and the first end of described 5th resistance simultaneously, the first end of described 3rd potentiometer connects the second end of described 3rd electric capacity, second end of described 3rd potentiometer connects the first end of described 4th electric capacity, second end of described 5th resistance connects the first end of described 5th electric capacity, second end of described 5th electric capacity connects the first end of described 6th resistance, second end of described 6th resistance is connected with the described first end of the 7th resistance and the in-phase input end of described amplifier simultaneously, the inverting input of described amplifier is connected with the first end of described 8th resistance and the first end of described 6th electric capacity simultaneously, second end of described 6th electric capacity connects the first end of described 9th resistance, second end of described 8th resistance simultaneously with the output of described amplifier, the first end of described 7th electric capacity is connected with the first end of described loud speaker, second end of described 7th electric capacity connects the first end of described tenth resistance, the positive pole of described DC power supply connects the cathode voltage input of described amplifier, the cathode voltage input of described amplifier simultaneously with the second end of described 7th resistance, second end of described 4th electric capacity, second end of described 9th resistance, second end of described tenth resistance, second end of described loud speaker, second end of described first potentiometer and the second end ground connection of described 3rd resistance.
The beneficial effects of the utility model are:
The utility model is made up of bass control circuit, high pitch control circuit and amplifying circuit, volume is controlled by corresponding potentiometer, circuit has the advantages that to prevent amplifier from producing low frequency self-excitation, and circuit structure is simple, element is few, cost is low, strong interference immunity, working stability, the amplifying signal distortion factor is low, is conducive to universal and promotes.
Accompanying drawing explanation
Fig. 1 is circuit structure schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1: the utility model comprises DC power supply V, audio input port IN, first resistance R1 is to the tenth resistance R10, first potentiometer RP1 is to the 3rd potentiometer RP3, first electric capacity C1 is to the 7th electric capacity C7, amplifier IC and loud speaker BY, audio input port IN connects the first end of the first resistance R1, second end of the first resistance R1 connects the first end of the first potentiometer RP1, the sliding end of the first potentiometer RP1 simultaneously with the first end of the second resistance R2 and the first end of the 3rd electric capacity C3, second end of the second resistance R2 is connected with the first end of the second potentiometer RP2 and the first end of the second electric capacity C2 simultaneously, second end of the second potentiometer RP2 is connected with the first end of the 3rd resistance R3 and the first end of the first electric capacity C1 simultaneously, second end of the first electric capacity C1 simultaneously with the first end of the 4th resistance R4, the sliding end of the second potentiometer RP2 is connected with second end of the second electric capacity CC2, second end of the 4th resistance R4 is connected with the sliding end of the 3rd potentiometer RP3 and the first end of the 5th resistance R5 simultaneously, the first end of the 3rd potentiometer RP3 connects second end of the 3rd electric capacity C3, second end of the 3rd potentiometer RP3 connects the first end of the 4th electric capacity C4, second end of the 5th resistance R5 connects the first end of the 5th electric capacity C5, second end of the 5th electric capacity C5 connects the first end of the 6th resistance R6, second end of the 6th resistance R6 is connected with the first end of the 7th resistance R7 and the in-phase input end of amplifier IC simultaneously, the inverting input of amplifier IC is connected with the first end of the 8th resistance R8 and the first end of the 6th electric capacity C6 simultaneously, second end of the 6th electric capacity C6 connects the first end of the 9th resistance R9, second end of the 8th resistance R8 simultaneously with the output of amplifier IC, the first end of the 7th electric capacity C7 is connected with the first end of loud speaker BY, second end of the 7th electric capacity C7 connects the first end of the tenth resistance R10, the positive pole of DC power supply V connects the cathode voltage input of amplifier IC, the cathode voltage input of amplifier IC simultaneously with second end of the 7th resistance R7, second end of the 4th electric capacity C4, second end of the 9th resistance R9, second end of the tenth resistance R10, second end of loud speaker BY, second end of the first potentiometer RP1 and the second end ground connection of the 3rd resistance R3.
Operation principle of the present utility model:
As shown in Figure 1: the second resistance R2 of the present utility model, 3rd resistance R3, second electric capacity C2, first electric capacity C1 and the second potentiometer RP2 forms bass control circuit, 3rd electric capacity C3, 4th electric capacity C4 and the 3rd potentiometer RP3 forms high pitch control circuit, 4th resistance R4 is isolation resistance, first potentiometer RP1 is volume controller, the volume of resonance-amplifier, 5th electric capacity C5 is the electric capacity of stopping direct current, amplifier IC employing model is the amplifier IC of TDA2030A, amplifying circuit is by amplifier IC, 8th resistance R8, 9th resistance R9 and the 6th electric capacity C6 forms, the multiplication factor of circuit is determined by the ratio of the 8th resistance R8 and the 9th resistance R9, the effect of the 7th electric capacity C7 and the tenth resistance R10 prevents amplifier IC from producing low frequency self-excitation.
Claims (1)
1. the audio-frequency power amplifier for multimedia electronic equipment, it is characterized in that: comprise DC power supply, audio input port, first resistance is to the tenth resistance, first potentiometer is to the 3rd potentiometer, first electric capacity is to the 7th electric capacity, amplifier and loud speaker, described audio input port connects the first end of described first resistance, second end of described first resistance connects the first end of described first potentiometer, the sliding end of described first potentiometer simultaneously with the first end of described second resistance and the first end of described 3rd electric capacity, second end of described second resistance is connected with the first end of described second potentiometer and the first end of described second electric capacity simultaneously, second end of described second potentiometer is connected with the first end of described 3rd resistance and the first end of described first electric capacity simultaneously, second end of described first electric capacity simultaneously with the first end of described 4th resistance, the sliding end of described second potentiometer is connected with the second end of described second electric capacity, second end of described 4th resistance is connected with the sliding end of described 3rd potentiometer and the first end of described 5th resistance simultaneously, the first end of described 3rd potentiometer connects the second end of described 3rd electric capacity, second end of described 3rd potentiometer connects the first end of described 4th electric capacity, second end of described 5th resistance connects the first end of described 5th electric capacity, second end of described 5th electric capacity connects the first end of described 6th resistance, second end of described 6th resistance is connected with the described first end of the 7th resistance and the in-phase input end of described amplifier simultaneously, the inverting input of described amplifier is connected with the first end of described 8th resistance and the first end of described 6th electric capacity simultaneously, second end of described 6th electric capacity connects the first end of described 9th resistance, second end of described 8th resistance simultaneously with the output of described amplifier, the first end of described 7th electric capacity is connected with the first end of described loud speaker, second end of described 7th electric capacity connects the first end of described tenth resistance, the positive pole of described DC power supply connects the cathode voltage input of described amplifier, the cathode voltage input of described amplifier simultaneously with the second end of described 7th resistance, second end of described 4th electric capacity, second end of described 9th resistance, second end of described tenth resistance, second end of described loud speaker, second end of described first potentiometer and the second end ground connection of described 3rd resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420658898.7U CN204206116U (en) | 2014-11-05 | 2014-11-05 | A kind of audio-frequency power amplifier for multimedia electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420658898.7U CN204206116U (en) | 2014-11-05 | 2014-11-05 | A kind of audio-frequency power amplifier for multimedia electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204206116U true CN204206116U (en) | 2015-03-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420658898.7U Expired - Fee Related CN204206116U (en) | 2014-11-05 | 2014-11-05 | A kind of audio-frequency power amplifier for multimedia electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204206116U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300926A (en) * | 2014-11-05 | 2015-01-21 | 成都市幻多奇软件有限公司 | Audio power amplifier used for multimedia electronic equipment |
-
2014
- 2014-11-05 CN CN201420658898.7U patent/CN204206116U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300926A (en) * | 2014-11-05 | 2015-01-21 | 成都市幻多奇软件有限公司 | Audio power amplifier used for multimedia electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160831 Address after: 529400 Enping District, Jiangmen industrial transfer industrial park, Guangdong two, Enping, Jiangmen, A6-1 Patentee after: ENPING JES AUDIO CO., LTD. Address before: 610041 No. 9 Xiaojiahe middle street, hi tech Zone, Sichuan, Chengdu Patentee before: CHENGDU FANTASEA SOFTWARE CO., LTD. |
|
| 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: 20150311 Termination date: 20161105 |