CN204304783U - A kind of for the booster circuit in audio amplifier - Google Patents
A kind of for the booster circuit in audio amplifier Download PDFInfo
- Publication number
- CN204304783U CN204304783U CN201420504880.1U CN201420504880U CN204304783U CN 204304783 U CN204304783 U CN 204304783U CN 201420504880 U CN201420504880 U CN 201420504880U CN 204304783 U CN204304783 U CN 204304783U
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- circuit
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- accumulator
- rectification
- pwm
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Abstract
The utility model proposes and a kind ofly comprise battery for the booster circuit in audio amplifier, pwm circuit, accumulator, on-off circuit, rectification circuit and voltage control circuit; Described pwm circuit is connected to described on-off circuit, controls the break-make of described on-off circuit for generation of a pulse width modulated wave; The input of described accumulator is connected to described battery; Described on-off circuit is also connected between the output of described accumulator and described rectification circuit, and the output that the pulse width modulated wave for producing according to pwm circuit controls accumulator produces an alternating current; Described rectification circuit is connected to the output of described accumulator, obtains VD for carrying out rectification to described alternating current; Described voltage control circuit is connected to described rectification circuit, for controlling and adjusting the VD of rectification circuit.Effectively can promote the power output of power amplifier.
Description
Technical field
The utility model relates to electronic technology field, is specifically related to the audio amplifier circuit engineering in a kind of electronic technology field.
Background technology
Existing battery audio amplifier, carries because needs are portable, is usually all only to adopt single-unit battery.But the usual voltage compare of single-unit battery is low, be all generally 12V, that adopts this battery, and the power supply of supply audio frequency power amplifier also only has 12V, and power output is all lower.The power ratio outputting to loudspeaker will be caused so lower, and speaker sound is inadequate, and this when outdoor application, needs larger volume to be an individual huge problem for portable loudspeaker box.
Utility model content
In view of this, the utility model embodiment provides a kind of scheme can make, when adopting monocell, to improve power amplifier power output.
The utility model is achieved in that providing a kind of comprises battery for the booster circuit in audio amplifier, for generation of a DC input voitage, and pwm circuit, accumulator, on-off circuit, rectification circuit and voltage control circuit; Described pwm circuit is connected to described on-off circuit, controls the break-make of described on-off circuit for generation of a pulse width modulated wave; The input of described accumulator is connected to described battery; Described on-off circuit is also connected between the output of described accumulator and described rectification circuit, and the output that the pulse width modulated wave for producing according to pwm circuit controls accumulator produces an alternating current; Described rectification circuit is connected to the output of described accumulator, obtains VD for carrying out rectification to described alternating current; Described voltage control circuit is connected to described rectification circuit, for controlling and adjusting the VD of rectification circuit.
Further, described pwm circuit uses chip GS3660.
Further, the positive pole of described first inductance is connected to described battery output, and described first inductance is 22 microhenrys.
Further, described rectification circuit comprises the first diode and the first electrochemical capacitor, described first diode is born level and is connected with the positive pole of described first electrochemical capacitor, the positive pole of described first diode is connected to the output of described first inductance, the negative level ground connection of described first electrochemical capacitor, described first electrochemical capacitor is 470 microfarads.
Further, described on-off circuit comprises a P raceway groove IGCT, and the source electrode of described P raceway groove IGCT is connected to described pwm circuit, grounded drain, and grid is connected to the output of the first inductance.
Further, described voltage control circuit by after the first resistance and the second capacitances in series with the second resistor coupled in parallel, then with the 3rd resistant series ground connection.
Further, when described DC input voitage is 12V, the first resistance is 100 kilo-ohms, the second resistance 59 kilo-ohms, the 3rd resistance 1 kilo-ohm, and the second electric capacity 470pf, described VD is 30V.
Further, also comprise an amplifying circuit, be series between the output of described pwm circuit and the input of described on-off circuit.
Adopting such scheme, 12V voltage being elevated to 30V or higher, supply power amplifier by using booster circuit, power amplifier is enable to meet voltage requirements, export powerful signal to loudspeaker, effectively can promote the power output of power amplifier, allow audio amplifier can send larger sound.
Accompanying drawing explanation
The booster circuit block diagram that Fig. 1 provides for the utility model embodiment;
The booster circuit schematic diagram that Fig. 2 provides for another embodiment of the utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1, the utility model embodiment provides a kind of for the booster circuit in audio amplifier, comprises battery 100, pwm circuit 400, accumulator 200, on-off circuit 500, rectification circuit 300 and voltage control circuit 600
Described battery 100 is for generation of a DC input voitage, and battery 100 is the single-unit savings batteries 100 in audio amplifier; Described pwm circuit 400 is connected to described on-off circuit 500, the break-make of described on-off circuit 500 is controlled for generation of a pulse width modulated wave, pwm circuit 400 produce pulse width modulated wave duty when frequency be all adjustable, the voltage that can regulate as required regulates; The input of described accumulator 200 is connected to described battery 100; Described on-off circuit 500 between the output being connected in described accumulator 200 and described rectification circuit 300, the output that pulse width modulated wave for producing according to pwm circuit 400 controls accumulator 200 produces an alternating current, direct electricity is controlled by the break-make of switch, produce an ac signal, accumulator 200 carries out charging energy-storing when on-off circuit 500 closes, when on-off circuit 500 is opened, discharge, to produce a higher voltage at rectification circuit 300 end; Described rectification circuit 300 is connected to the output of described accumulator 200, obtains VD for carrying out rectification to described alternating current; Described voltage control circuit 600 is connected to described rectification circuit 300, for controlling and adjusting the VD of rectification circuit 300, carries out output voltage adjustment by electric resistance partial pressure.
According to the booster circuit for audio amplifier that another embodiment of the utility model provides, as shown in Figure 2,
Specialize a upper embodiment, certain those skilled in the art understand, and these circuit can adopt other modes to realize, and described pwm circuit uses chip GS3660 (U12).The positive pole of the first inductance L 7 is connected to described battery output, and described first inductance is 22 microhenrys.Described rectification circuit comprises the first diode D16 and the first electrochemical capacitor C62, described first diode D16 bears level and connects with the positive pole of described first electrochemical capacitor C62, the positive pole of described first diode D16 is connected to the output of described first inductance L 7, the negative level ground connection of described first electrochemical capacitor C62, described first electrochemical capacitor C62 is 470 microfarads.Described on-off circuit comprises a P raceway groove IGCT Q17, and the source electrode of described P raceway groove IGCT Q17 is connected to described pwm circuit, grounded drain, and grid is connected to the output of described first inductance L 7.Described voltage control circuit is in parallel with the second resistance R132 (59K Ω) after being connected by the first resistance R129 (100K Ω) and the second electric capacity C124 (470pf), then with the 3rd resistance R133 (1K Ω) ground connection of connecting.The 12V voltage of a single-unit battery can be elevated to 30V or higher, supply power amplifier by above-mentioned physical circuit, enable power amplifier meet voltage requirements, export powerful signal to loudspeaker.
The present invention also provides an embodiment, on the basis of above-described embodiment, also comprises an amplifying circuit, between the output of series connection and described pwm circuit and the input of described on-off circuit.Enough become by a triode, or 2 triodes composing in parallel, for increasing the driving force of metal-oxide-semiconductor, ensureing that rectification circuit has enough large power.
The foregoing is only embodiment of the present utility model, not in order to limit the utility model, all make within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (8)
1. for the booster circuit in audio amplifier, comprise battery, for generation of a DC input voitage, it is characterized in that, described booster circuit also comprises:
Pwm circuit, accumulator, on-off circuit, rectification circuit and voltage control circuit;
Described pwm circuit is connected to described on-off circuit, controls the break-make of described on-off circuit for generation of a pulse width modulated wave;
The input of described accumulator is connected to described battery;
Described on-off circuit is also connected between the output of described accumulator and described rectification circuit, and the output that the pulse width modulated wave for producing according to pwm circuit controls accumulator produces an alternating current;
Described rectification circuit is connected to the output of described accumulator, obtains VD for carrying out rectification to described alternating current;
Described voltage control circuit is connected to described rectification circuit, for controlling and adjusting the VD of rectification circuit.
2. booster circuit according to claim 1, is characterized in that, described pwm circuit uses chip GS3660.
3. booster circuit according to claim 1, is characterized in that, described accumulator comprises the first inductance, and the positive pole of described first inductance is connected to described battery output, and described first inductance is 22 microhenrys.
4. booster circuit according to claim 3, it is characterized in that, described rectification circuit comprises the first diode and the first electrochemical capacitor, described first diode is born level and is connected with the positive pole of described first electrochemical capacitor, the positive pole of described first diode is connected to the output of described first inductance, the negative level ground connection of described first electrochemical capacitor, described first electrochemical capacitor is 470 microfarads.
5. booster circuit according to claim 1, is characterized in that, described on-off circuit comprises a P raceway groove IGCT, and the source electrode of described P raceway groove IGCT is connected to described pwm circuit, grounded drain, and grid is connected to the output of the first inductance.
6. booster circuit according to claim 1, is characterized in that, described voltage control circuit by after the first resistance and the second capacitances in series with the second resistor coupled in parallel, then with the 3rd resistant series ground connection.
7. booster circuit according to claim 1, is characterized in that, when described DC input voitage is 12V, the first resistance is 100 kilo-ohms, the second resistance 59 kilo-ohms, the 3rd resistance 1 kilo-ohm, and the second electric capacity 470pf, described VD is 30V.
8. booster circuit according to claim 1, is characterized in that, also comprises amplifying circuit, is series between the output of described pwm circuit and the input of described on-off circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420504880.1U CN204304783U (en) | 2014-09-03 | 2014-09-03 | A kind of for the booster circuit in audio amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420504880.1U CN204304783U (en) | 2014-09-03 | 2014-09-03 | A kind of for the booster circuit in audio amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204304783U true CN204304783U (en) | 2015-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420504880.1U Expired - Fee Related CN204304783U (en) | 2014-09-03 | 2014-09-03 | A kind of for the booster circuit in audio amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204304783U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109144467A (en) * | 2018-09-05 | 2019-01-04 | 京东方科技集团股份有限公司 | Electronic equipment, prompt tone method of adjustment and device, computer readable storage medium |
-
2014
- 2014-09-03 CN CN201420504880.1U patent/CN204304783U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109144467A (en) * | 2018-09-05 | 2019-01-04 | 京东方科技集团股份有限公司 | Electronic equipment, prompt tone method of adjustment and device, computer readable storage medium |
| CN109144467B (en) * | 2018-09-05 | 2022-01-11 | 京东方科技集团股份有限公司 | Electronic device, alert tone adjusting method and apparatus, and computer-readable storage medium |
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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: 20150429 Termination date: 20170903 |