CN204697277U - The sound control circuit that a kind of USB powers - Google Patents
The sound control circuit that a kind of USB powers Download PDFInfo
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- CN204697277U CN204697277U CN201520343678.XU CN201520343678U CN204697277U CN 204697277 U CN204697277 U CN 204697277U CN 201520343678 U CN201520343678 U CN 201520343678U CN 204697277 U CN204697277 U CN 204697277U
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Abstract
The utility model provides a kind of USB sound control circuit of powering, comprise: power supply, sound control circuit, power amplification circuit and loudspeaker, the output of audio signal connects sound control circuit, the output of described sound control circuit connects described power amplifier, the output of described power amplification circuit connects loudspeaker, the output of described power supply connects voice controller and power amplification circuit, described power supply comprises power supply adaptor, USB interface and switching circuit, extraneous Power convert is operating voltage by described power supply adaptor, be connected with power amplification circuit by switching circuit, the output that described USB interface connects connects power supply adaptor, be connected with the power input of sound control circuit simultaneously.The utility model is powered by USB interface and power supply adaptor, controls being turned on or off of the power output end of power supply adaptor and the power input of power amplification circuit, saves energy by switching circuit.
Description
Technical field
The utility model relates to a kind of sound equipment, is specifically related to the sound control circuit that a kind of USB powers.
Background technology
Sound equipment is well received by consumers as music player devices, at present, the known sound equipment of people mainly realizes its playing function by being connected with various audiogenic device, such as with VCD, MP3, computer connects, but this sound equipment generally adopts jack power supply to power to sound equipment, when sound equipment is connected with computer, need to carry out interface conversion, or adopt earphone interface to connect, existing sound equipment comprises sound control circuit, power amplification circuit and power circuit, sound control circuit is used for processing voice signal, power amplification circuit is used for carrying out power amplification to voice signal, power circuit is used for being that the operating voltage of system is powered by extraneous Power convert, the driving voltage of power amplification circuit and the supply power voltage of sound control circuit are comprised to the power supply of sound equipment, and when sound equipment is in holding state, power amplification circuit will be stopped power supply, but the power supply of control circuit still works on, be unfavorable for the saving of electric energy.
Utility model content
In order to overcome above-mentioned prior art Problems existing, the utility model provides a kind of USB sound control circuit of powering.
The technical scheme that the utility model is taked is: the sound control circuit that a kind of USB powers, it is characterized in that, comprise: power supply, sound control circuit, power amplification circuit and loudspeaker, the output of audio signal connects sound control circuit, the output of described sound control circuit connects described power amplifier, the output of described power amplification circuit connects loudspeaker, the output of described power supply connects voice controller and power amplification circuit, described power supply comprises power supply adaptor, USB interface and switching circuit, extraneous Power convert is operating voltage by described power supply adaptor, be connected with power amplification circuit by switching circuit, described USB interface connects power supply adaptor, be connected with the power input of sound control circuit simultaneously.
Further, described switching circuit comprises metal-oxide-semiconductor V1, triode V2, resistance R1, resistance R2, resistance R3 and resistance R4; The drain electrode of described metal-oxide-semiconductor V1 connects the input of power amplification circuit, the source electrode of metal-oxide-semiconductor V1 is connected with the output of power supply adaptor, the two ends of described resistance R1 are connected with the grid of metal-oxide-semiconductor V1 and source electrode respectively, the grid of described metal-oxide-semiconductor V1 is connected with the collector electrode of triode V2 by resistance R2, the base stage of described triode V2 is connected with USB interface by resistance R3, parallel resistance R4 between the emitter of described USB interface and triode V2.
Further, between described switching circuit and power amplification circuit, also power-supplying circuit is set, described power-supplying circuit comprises diode D1, resistance R5, resistance R6 and triode V3, the output of described switching circuit connects the anode of diode D1, the negative electrode of described diode D1 connects power amplification circuit, the two ends of described resistance R5 connect the anode of diode D1 and the base stage of triode V3 respectively, one end of described resistance R2 connects the collector electrode of described triode V3, other end ground connection, the emitter of described triode V3 connects the input of power amplification circuit.
The beneficial effects of the utility model are: the utility model is powered by USB interface and power supply adaptor, control being turned on or off of the output of power supply adaptor and the input of power amplification circuit by switching circuit.When being powered to power supply adaptor by USB interface, switching circuit controls the output of power supply adaptor and the input conducting of power amplification circuit, to power to power amplification circuit, when usb circuit stops powering to power interface, switching circuit controls the output of power supply adaptor and the power input of power amplification circuit disconnects, stop powering to power amplification circuit, this supply power mode can effectively manage power supply, saves energy.
Accompanying drawing explanation
The sound control circuit structure chart that a kind of USB that Fig. 1 provides for the utility model powers.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
See Fig. 1, the sound control circuit structure chart that a kind of USB provided for the utility model powers.
As shown in Figure 1, the sound control circuit that a kind of USB powers, it is characterized in that, comprise: power supply, sound control circuit, power amplification circuit and loudspeaker, the output of audio signal connects sound control circuit, the output of described sound control circuit connects described power amplifier, the output of described power amplification circuit connects loudspeaker, the output of described power supply connects voice controller and power amplification circuit, described power supply comprises power supply adaptor, USB interface and switching circuit, extraneous Power convert is operating voltage by described power supply adaptor, be connected with power amplification circuit by switching circuit, the output that described USB interface connects connects power supply adaptor, be connected with the power input of sound control circuit simultaneously.
In the utility model embodiment, powered by USB interface and power supply adaptor, control being turned on or off of the power output end of power supply adaptor and the power input of power amplification circuit by switching circuit.
In the utility model embodiment, when being powered to power interface by USB interface, switching circuit controls the output of power supply adaptor and the input conducting of power amplification circuit, to power to power amplification circuit, when usb circuit stops powering to power interface, switching circuit controls the output of power supply adaptor and the power input of power amplification circuit disconnects, and stops powering to power amplification circuit, this supply power mode can effectively manage power supply, saves energy.
Further, described switching circuit comprises metal-oxide-semiconductor V1, triode V2, resistance R1, resistance R2, resistance R3 and resistance R4; The drain electrode of described metal-oxide-semiconductor V1 connects the input of power amplification circuit, the source electrode of metal-oxide-semiconductor V1 is connected with the output of power supply adaptor, the two ends of described resistance R1 are connected with the grid of metal-oxide-semiconductor V1 and source electrode respectively, the grid of described metal-oxide-semiconductor V1 is connected with the collector electrode of triode V2 by resistance R2, the base stage of described triode V2 is connected with USB interface by resistance R3, parallel resistance R4 between the emitter of described USB interface and triode V2.
Further, between described switching circuit and power amplification circuit, also power-supplying circuit is set, described power-supplying circuit comprises diode D1, resistance R5, resistance R6 and triode V3, the output of described switching circuit connects the anode of diode D1, the negative electrode of described diode D1 connects power amplification circuit, the two ends of described resistance R5 connect the anode of diode D1 and the base stage of triode V3 respectively, one end of described resistance R2 connects the collector electrode of described triode V3, other end ground connection, the emitter of described triode V3 connects the input of power amplification circuit.
In the utility model embodiment, the phenomenon that when preventing digital power amplifying circuit output low frequency audio signal by arranging unilateral diode, electric current is refunded, adopts discharge circuit to carry out voltage stabilizing to the operating voltage of digital power amplifying circuit.
Above the utility model is described in detail, but the utility model is not limited to above-mentioned execution mode, in the ken that those of ordinary skill in the art possess, can also makes a variety of changes under the prerequisite not departing from the utility model aim.Do not depart from design of the present utility model and scope can make many other and change and remodeling.Should be appreciated that the utility model is not limited to specific execution mode, scope of the present utility model is defined by the following claims.
Claims (3)
1. the USB sound control circuit of powering, it is characterized in that, comprise: power supply, sound control circuit, power amplification circuit and loudspeaker, the output of audio signal connects sound control circuit, the output of described sound control circuit connects described power amplifier, the output of described power amplification circuit connects loudspeaker, the output of described power supply connects voice controller and power amplification circuit, described power supply comprises power supply adaptor, USB interface and switching circuit, extraneous Power convert is operating voltage by described power supply adaptor, be connected with power amplification circuit by switching circuit, described USB interface connects power supply adaptor, be connected with the power input of sound control circuit simultaneously.
2. a kind of USB according to claim 1 sound control circuit of powering, it is characterized in that, described switching circuit comprises metal-oxide-semiconductor V1, triode V2, resistance R1, resistance R2, resistance R3 and resistance R4; The drain electrode of described metal-oxide-semiconductor V1 connects the input of power amplification circuit, the source electrode of metal-oxide-semiconductor V1 is connected with the output of power supply adaptor, the two ends of described resistance R1 are connected with the grid of metal-oxide-semiconductor V1 and source electrode respectively, the grid of described metal-oxide-semiconductor V1 is connected with the collector electrode of triode V2 by resistance R2, the base stage of described triode V2 is connected with USB interface by resistance R3, parallel resistance R4 between the emitter of described USB interface and triode V2.
3. a kind of USB according to claim 1 sound control circuit of powering, it is characterized in that, between described switching circuit and power amplification circuit, also power-supplying circuit is set, described power-supplying circuit comprises diode D1, resistance R5, resistance R6 and triode V3, the output of described switching circuit connects the anode of diode D1, the negative electrode of described diode D1 connects power amplification circuit, the two ends of described resistance R5 connect the anode of diode D1 and the base stage of triode V3 respectively, one end of described resistance R2 connects the collector electrode of described triode V3, other end ground connection, the emitter of described triode V3 connects the input of power amplification circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520343678.XU CN204697277U (en) | 2015-05-25 | 2015-05-25 | The sound control circuit that a kind of USB powers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520343678.XU CN204697277U (en) | 2015-05-25 | 2015-05-25 | The sound control circuit that a kind of USB powers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204697277U true CN204697277U (en) | 2015-10-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520343678.XU Active CN204697277U (en) | 2015-05-25 | 2015-05-25 | The sound control circuit that a kind of USB powers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204697277U (en) |
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2015
- 2015-05-25 CN CN201520343678.XU patent/CN204697277U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |