CN201207726Y - Simple power amplifier having automatically switching function - Google Patents
Simple power amplifier having automatically switching function Download PDFInfo
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- CN201207726Y CN201207726Y CNU200820102454XU CN200820102454U CN201207726Y CN 201207726 Y CN201207726 Y CN 201207726Y CN U200820102454X U CNU200820102454X U CN U200820102454XU CN 200820102454 U CN200820102454 U CN 200820102454U CN 201207726 Y CN201207726 Y CN 201207726Y
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- output connector
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Abstract
Disclosed is a simple amplifier with an automatic switch function, which comprises an earphone socket, an audio signal input/output connector which is connected with the audio signal generator, an LM4866MTE type audio amplifier, a first amplifier signal output connector, a secondary amplifier signal output connector and a power plug; wherein the earphone socket is directly connected with the audio signal input/output connector and at the same time is connected with the input interface of the audio amplifier. The two output interfaces of the audio amplifier are respectively connected with the first amplifier signal input connector and the secondary amplifier signal input connector. The power plug is connected with a power input interface of the audio power amplifier. The first amplifier signal output connector and the secondary amplifier signal output connector are directly connected with the corresponding + and - connecting poles. The amplifier has the advantages that: the power can be amplified by only supplying +5V voltage and audio signals; the simple automatic switch between the earphone and a louderspeaker can be realized; the volume is small and the cost is low with internal arrangement.
Description
[technical field]
The utility model is about computer peripheral, is meant a kind of simple and easy power amplifier with automatic switching function especially.
[background technology]
Existing power amplifier all is by connecting line audio signal to be input to the power amplifier chip, is produced the driving voltage of loud speaker by the power amplifier chip.And all be to adopt external power amplifier at present, and the volume of external power amplifier is general bigger, price is also than higher, and this external power amplifier and earphone use same audio port, need pull out power amplifier during the use earphone, need pull out earphone, troublesome poeration during the use power amplifier.
[summary of the invention]
Technical problem to be solved in the utility model be to provide a kind of simple in structure, volume is little, cost is low and the simple and easy power amplifier with automatic switching function of can automatically switch power amplifier and earphone.
The utility model solves the problems of the technologies described above by the following technical programs: a kind of simple and easy power amplifier with automatic switching function, comprise earphone socket, connect the input and output joint that audio signal produces the audio signal of equipment, and power connection, comprise that also model is the audio-frequency power amplifier of LM4866MTE, the first power amplifier signal output connector, the second power amplifier signal output connector, wherein earphone socket is connected directly to the input and output joint of audio signal, earphone socket is connected to the input port of audio-frequency power amplifier simultaneously, two output ports of audio-frequency power amplifier connect the first power amplifier signal output connector and the second power amplifier signal output connector respectively, power connection is connected to the power input mouth of audio-frequency power amplifier, and the first power amplifier signal output connector and the second power amplifier signal output connector are directly received "+" of loud speaker correspondence, on "-" binding post.
The utility model further is specially:
Also comprise Mike's socket, described Mike's socket is connected directly to the input and output joint of audio signal.
Two outputs of described earphone socket are connected to 6 pin and 15 pin of audio-frequency power amplifier respectively through resistance R 1, R3; 15 pin of audio-frequency power amplifier are interconnected by a resistance R 4 and 16 pin, and 6 pin of audio-frequency power amplifier are interconnected by a resistance R 2 and 5 pin; 5 pin of audio-frequency power amplifier are connected to 2 pin of the second power amplifier signal output connector, 3 pin of audio-frequency power amplifier are connected to 1 pin of the second power amplifier signal output connector, 16 pin of audio-frequency power amplifier are connected to 2 pin of the first power amplifier signal output connector, and 18 pin of audio-frequency power amplifier are connected to 1 pin of the first power amplifier signal output connector; 8 pin of audio-frequency power amplifier, 14 pin, 13 pin are connected to each other the back and connect power supply ground by capacitor C 1.
The resistance of described resistance R 1 and resistance R 3 equates that the resistance of resistance R 2 and resistance R 4 equates.
2 pin of described power connection connect power supply ground by magnetic bead FB16,1 pin is connected to an end of an end, capacitor C E2 and the capacitor C 3 of fuse PS5 simultaneously, another termination power ground of capacitor C E2 and capacitor C 3, the other end of fuse PS5 is connected respectively to 4 pin, 17 pin, the end of capacitor C E1 and an end of capacitor C 2 of audio-frequency power amplifier, another termination power ground of the other end of capacitor C E1 and capacitor C 2.
1 pin of the first power amplifier signal output connector and the second power amplifier signal output connector is "+" binding post of corresponding loud speaker respectively, "-" binding post of the corresponding loud speaker of 2 pin of the first power amplifier signal output connector and the second power amplifier signal output connector.
The advantage that the utlity model has the simple and easy power amplifier of automatic switching function is: as long as provide+5V power supply and audio signal to this simple and easy power amplifier with automatic switching function, just can realize power amplification, and can realize the simple automatic switchover of earphone and loud speaker, this simple and easy power amplifier volume with automatic switching function is little, cost is low, can be built-in.
[description of drawings]
The utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the circuit connection diagram that the utlity model has the simple and easy power amplifier of automatic switching function.
[embodiment]
See also Fig. 1, the simple and easy power amplifier that the utlity model has automatic switching function comprises the input and output joint J3 of earphone socket J1, MIC socket J2, audio signal, audio-frequency power amplifier, the first power amplifier signal output connector J4, the second power amplifier signal output connector J5 that model is LM4866MTE, and power connection J6.Wherein audio-frequency power amplifier uses the 2.2W dual track shutdown mode audio-frequency power amplifier LM4866MTE of NS (national semiconductor) company.
Wherein earphone socket J1, MIC (Mike) socket J2 is connected directly to the input and output joint J3 of audio signal, earphone socket J1 is connected to the input port of audio-frequency power amplifier simultaneously, two output ports of audio-frequency power amplifier connect the first power amplifier signal output connector J4 and the second power amplifier signal output connector J5 respectively, and power connection J6 is connected to the power input mouth of audio-frequency power amplifier.
Annexation is as described below more specifically.
Two outputs of earphone socket J1 are connected to 6 pin (INA, first reverse input end) and 15 pin (INB, second reverse input end) of audio-frequency power amplifier respectively through resistance R 1, R3; 15 pin of audio-frequency power amplifier are interconnected by a resistance R 4 and 16 pin (OUTB, second inverse output terminal), and 6 pin of audio-frequency power amplifier are interconnected by a resistance R 2 and 5 pin (OUTA, first inverse output terminal); 5 pin of audio-frequency power amplifier are connected to 2 pin of the second power amplifier signal output connector J5,3 pin (+OUTA of audio-frequency power amplifier, the first forward output) is connected to 1 pin of the second power amplifier signal output connector J5,16 pin of audio-frequency power amplifier are connected to 2 pin of the first power amplifier signal output connector J4,18 pin of audio-frequency power amplifier (+OUTB, the second forward output) are connected to 1 pin of the first power amplifier signal output connector J4; 8 pin of audio-frequency power amplifier (+INA, first positive input), 14 pin (BYPASS, bypass ports), 13 pin (+INB, second positive input) are connected to each other the back and connect power supply ground by capacitor C 1.
The effect of wherein above-mentioned resistance R 1, R2, R3, R4 is the gain A of regulating audio-frequency power amplifier: A=2* (R2/R1), and require R1=R3, R2=R4, the value of resistance R 1, R2, R3, R4 is all got 18K in the design, so the gain of power amplifier is: A=2, capacitor C 1 is used for the filtering of pin.
2 pin of power connection J6 connect power supply ground by magnetic bead FB16,1 pin is connected to an end of an end, capacitor C E2 and the capacitor C 3 of fuse PS5 simultaneously, another termination power ground of capacitor C E2 and capacitor C 3, the other end of fuse PS5 is connected respectively to 4 pin (VCC1 of audio-frequency power amplifier, first power input), 17 pin (VCC2, the second source input), the end of capacitor C E1 and an end of capacitor C 2, another termination power ground of the other end of capacitor C E1 and capacitor C 2.Wherein capacitor C E1, capacitor C E2, capacitor C 2, capacitor C 3 are for importing the filter capacitor of power supply.Fuse PS5 adopts the fuse of 1.1A, avoids overcurrent.
During use, power connection J6 connects+the 5V power supply; The input and output joint J3 of audio signal connects audio signal and produces equipment; The first power amplifier signal output connector J4 and the second power amplifier signal output connector J5 directly receive on "+", "-" binding post of loud speaker correspondence, loud speaker can adopt 2 watts in 8 Europe, it is low so just can to satisfy general instructions for use and noise, the distortion factor is little, and 1 pin of the first power amplifier signal output connector J4 and the second power amplifier signal output connector J5 is "+" binding post of corresponding loud speaker respectively, "-" binding post of the corresponding loud speaker of 2 pin of the first power amplifier signal output connector J4 and the second power amplifier signal output connector J5.
When not inserting earphone on the earphone socket J1, audio input signal is connected to audio-frequency power amplifier behind earphone socket J1, and audio-frequency power amplifier is in the bridge amplifier pattern, to drive loud speaker; When earphone socket J1 went up the insertion earphone, audio signal was not input to audio-frequency power amplifier, and audio signal directly drives three-dimensional earphone, and promptly the audio signal nature switches on the earphone; When not using earphone when needs use loud speaker, can directly earphone be extracted earphone socket J1, at this moment audio signal just switches on the loud speaker again naturally; Thereby realized the simple automatic switchover of earphone and loud speaker.When needs use MIC, MIC can be received on the MIC socket J2, so just voice signal can be input to the corresponding interface through the input and output joint J3 of MIC socket J2, audio signal and handle.
Claims (6)
1. simple and easy power amplifier with automatic switching function, comprise earphone socket, connect the input and output joint that audio signal produces the audio signal of equipment, and power connection, it is characterized in that: comprise that model is the audio-frequency power amplifier of LM4866MTE, the first power amplifier signal output connector, the second power amplifier signal output connector, wherein earphone socket is connected directly to the input and output joint of audio signal, earphone socket is connected to the input port of audio-frequency power amplifier simultaneously, two output ports of audio-frequency power amplifier connect the first power amplifier signal output connector and the second power amplifier signal output connector respectively, power connection is connected to the power input mouth of audio-frequency power amplifier, and the first power amplifier signal output connector and the second power amplifier signal output connector are directly received "+" of loud speaker correspondence, on "-" binding post.
2. the simple and easy power amplifier with automatic switching function as claimed in claim 1 is characterized in that: also comprise Mike's socket, described Mike's socket is connected directly to the input and output joint of audio signal.
3. the simple and easy power amplifier with automatic switching function as claimed in claim 1 is characterized in that: two outputs of described earphone socket are connected to 6 pin and 15 pin of audio-frequency power amplifier respectively through resistance R 1, R3; 15 pin of audio-frequency power amplifier are interconnected by a resistance R 4 and 16 pin, and 6 pin of audio-frequency power amplifier are interconnected by a resistance R 2 and 5 pin; 5 pin of audio-frequency power amplifier are connected to 2 pin of the second power amplifier signal output connector, 3 pin of audio-frequency power amplifier are connected to 1 pin of the second power amplifier signal output connector, 16 pin of audio-frequency power amplifier are connected to 2 pin of the first power amplifier signal output connector, and 18 pin of audio-frequency power amplifier are connected to 1 pin of the first power amplifier signal output connector; 8 pin of audio-frequency power amplifier, 14 pin, 13 pin are connected to each other the back and connect power supply ground by capacitor C 1.
4. the simple and easy power amplifier with automatic switching function as claimed in claim 3 is characterized in that: the resistance of described resistance R 1 and resistance R 3 equates that the resistance of resistance R 2 and resistance R 4 equates.
5. the simple and easy power amplifier with automatic switching function as claimed in claim 1, it is characterized in that: 2 pin of described power connection connect power supply ground by magnetic bead FB16,1 pin is connected to an end of an end, capacitor C E2 and the capacitor C 3 of fuse PS5 simultaneously, another termination power ground of capacitor C E2 and capacitor C 3, the other end of fuse PS5 is connected respectively to 4 pin, 17 pin, the end of capacitor C E1 and an end of capacitor C 2 of audio-frequency power amplifier, another termination power ground of the other end of capacitor C E1 and capacitor C 2.
6. the simple and easy power amplifier with automatic switching function as claimed in claim 1, it is characterized in that: 1 pin of the first power amplifier signal output connector and the second power amplifier signal output connector is "+" binding post of corresponding loud speaker respectively, "-" binding post of the corresponding loud speaker of 2 pin of the first power amplifier signal output connector and the second power amplifier signal output connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820102454XU CN201207726Y (en) | 2008-05-27 | 2008-05-27 | Simple power amplifier having automatically switching function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820102454XU CN201207726Y (en) | 2008-05-27 | 2008-05-27 | Simple power amplifier having automatically switching function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201207726Y true CN201207726Y (en) | 2009-03-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820102454XU Expired - Fee Related CN201207726Y (en) | 2008-05-27 | 2008-05-27 | Simple power amplifier having automatically switching function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201207726Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102395082A (en) * | 2011-10-08 | 2012-03-28 | 徐志强 | Miniature sound equipment with input output dual-purpose socket |
| CN102427570A (en) * | 2011-11-29 | 2012-04-25 | 宁波东源音响器材有限公司 | Wireless sound box |
| CN103067822A (en) * | 2012-12-17 | 2013-04-24 | 青岛海信宽带多媒体技术有限公司 | High-fidelity (Hi-Fi) audio adapter |
-
2008
- 2008-05-27 CN CNU200820102454XU patent/CN201207726Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102395082A (en) * | 2011-10-08 | 2012-03-28 | 徐志强 | Miniature sound equipment with input output dual-purpose socket |
| CN102427570A (en) * | 2011-11-29 | 2012-04-25 | 宁波东源音响器材有限公司 | Wireless sound box |
| CN102427570B (en) * | 2011-11-29 | 2015-12-02 | 宁波东源音响器材有限公司 | Wireless sound box |
| CN103067822A (en) * | 2012-12-17 | 2013-04-24 | 青岛海信宽带多媒体技术有限公司 | High-fidelity (Hi-Fi) audio adapter |
| CN103067822B (en) * | 2012-12-17 | 2015-03-04 | 青岛海信宽带多媒体技术有限公司 | High-fidelity (Hi-Fi) audio adapter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090311 Termination date: 20110527 |