CN204350071U - A kind of mobile phone earphone interface power-supply circuit - Google Patents
A kind of mobile phone earphone interface power-supply circuit Download PDFInfo
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- CN204350071U CN204350071U CN201420857172.6U CN201420857172U CN204350071U CN 204350071 U CN204350071 U CN 204350071U CN 201420857172 U CN201420857172 U CN 201420857172U CN 204350071 U CN204350071 U CN 204350071U
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Abstract
The utility model discloses a kind of mobile phone earphone interface power-supply circuit, the drive circuit comprising earphone detection circuit, the audio frequency transformer circuit be connected with described earphone detection circuit, the metal-oxide-semiconductor rectification circuit be connected with described audio frequency transformer circuit and be connected with described metal-oxide-semiconductor rectification circuit, described earphone detection circuit is used for peripheral hardware accessory and earphone interface being carried out adaptation and audio signal being inputted from described earphone interface; Audio frequency transformer circuit for receiving the audio signal of described earphone detection circuit input, and boosts to the sine wave received; Metal-oxide-semiconductor rectification circuit is used for the AC signal after by boosting and becomes direct current signal; The direct current signal that drive circuit is used for described metal-oxide-semiconductor rectification circuit exports carries out the last output dc voltage of voltage stabilizing.The utility model circuit is simple, and directly can produce audio signal with mobile phone can power, practical.
Description
Technical field
The utility model belongs to a kind of circuit.
Background technology
The existing large Multifunctional electric pond of embedded mobile phone audio port accessory powers, use inconvenience, audio interface is than OTG (On-The-GO) interface unified standard, and audio port is powered applied widely, OTG powers and need support the chip hardware support of OTG function, and system cost is high.
Utility model content
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, provides a kind of and is applicable to multiple mobile phone powering solution, compatible strong mobile phone earphone interface power-supply circuit.
For achieving the above object, the utility model adopts following technical proposals:
A kind of mobile phone earphone interface power-supply circuit, comprises
Earphone detection circuit, described earphone detection circuit is used for peripheral hardware accessory and earphone interface being carried out adaptation and audio signal being inputted from described earphone interface;
The audio frequency transformer circuit be connected with described earphone detection circuit, described audio frequency transformer circuit for receiving the audio signal of described earphone detection circuit input, and boosts to the sine wave received;
The metal-oxide-semiconductor rectification circuit be connected with described audio frequency transformer circuit, described metal-oxide-semiconductor rectification circuit is used for the AC signal after by boosting and becomes direct current signal;
The drive circuit be connected with described metal-oxide-semiconductor rectification circuit, the direct current signal that described drive circuit is used for described metal-oxide-semiconductor rectification circuit exports carries out the last output dc voltage of voltage stabilizing.
Described earphone detection circuit comprises four sections of earphone interfaces, the first resistance, the first electric capacity, the second resistance and the second electric capacity, 3 pin of described earphone interface connect the first resistance, one end of the first electric capacity and described audio frequency transformer circuit respectively, the other end ground connection of described first resistance and the first electric capacity, 2 pin of described earphone interface connect one end of described second resistance and the second electric capacity respectively, the other end ground connection of described second resistance and the second electric capacity, 4 pin ground connection of described earphone interface.
Described audio frequency transformer circuit comprises a transformer, and the Same Name of Ends of the primary winding of described transformer connects described earphone detection circuit, the different name end ground connection of its primary winding, and the Same Name of Ends of secondary winding transformer is connected described metal-oxide-semiconductor rectification circuit with different name end.
Described metal-oxide-semiconductor rectification circuit comprises a P type metal-oxide-semiconductor, the first N-type metal-oxide-semiconductor, the second N-type metal-oxide-semiconductor and the 2nd P type metal-oxide-semiconductor, and the secondary winding transformer Same Name of Ends of described transformer connects the grid of the drain and gate of a P type metal-oxide-semiconductor, the drain electrode of the first N-type metal-oxide-semiconductor and the second N-type metal-oxide-semiconductor; The secondary winding transformer different name end of described transformer connects grid and drain electrode, the grid of the first N-type metal-oxide-semiconductor and the drain electrode of the second N-type metal-oxide-semiconductor of the 2nd P type metal-oxide-semiconductor; The source electrode of the one P type metal-oxide-semiconductor and the source electrode of the 2nd P type metal-oxide-semiconductor connect described drive circuit, the source electrode of the first N-type metal-oxide-semiconductor and the source ground of the second N-type metal-oxide-semiconductor.
Described drive circuit comprises pressurizer, diode, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the first electrochemical capacitor and the second electrochemical capacitor;
The input of described pressurizer connects the negative electrode of described diode, the 3rd electric capacity and one end of the 4th electric capacity and the anode of the first electrochemical capacitor respectively, the other end of described 3rd electric capacity and the 4th electric capacity and the minus earth of described first electrochemical capacitor, the anode of described diode connects described metal-oxide-semiconductor rectification circuit;
The output of described pressurizer connects the anode of the second electrochemical capacitor and one end of the 5th electric capacity respectively, the negative electrode of described second electrochemical capacitor and the other end ground connection of described 5th electric capacity; The earth terminal ground connection of described pressurizer.
After adopting technique scheme, compared with prior art, tool has the following advantages the utility model:
1, directly can produce audio signal with mobile phone by the utility model scheme can power, without the need to battery.
2, all have the equipment of audio port this scheme all available to power to peripheral hardware.
3, circuit is simple, without the need to too much software support, is applicable to multiple mobile phone powering solution, compatible strong.
Accompanying drawing explanation
Fig. 1 is circuit of the present utility model composition schematic diagram;
Fig. 2 is the circuit diagram of earphone detection circuit;
Fig. 3 is the circuit diagram of audio frequency transformer circuit;
Fig. 4 is the circuit diagram of metal-oxide-semiconductor rectification circuit;
Fig. 5 is the circuit diagram of drive circuit;
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, a kind of mobile phone earphone interface power-supply circuit, comprises the earphone detection circuit 1, audio frequency transformer circuit 2, metal-oxide-semiconductor rectification circuit 3 and the drive circuit 4 that are connected successively.
As shown in Figure 2, earphone detection circuit 1 comprises four sections of earphone interface J24, the first resistance R127, the first electric capacity C117, the second resistance R128 and the second electric capacity C127,3 pin of earphone interface J24 connect one end of the first resistance R127, one end of the first electric capacity C117 and audio frequency transformer circuit 2 respectively, the other end ground connection of the first resistance R127 and the first electric capacity C117,2 pin of earphone interface J24 connect one end of the second resistance R128 and the second electric capacity C127 respectively, the other end ground connection of the second resistance R128 and the second electric capacity C127, the 4 pin ground connection of earphone interface J24.
Earphone detection circuit 1 is for carrying out adaptation by peripheral hardware accessory and earphone interface J24, and audio signal inputs from earphone interface J24, and the sinusoidal audio Signal transmissions of the 22kHz produced by mobile phone A pp is to audio frequency transformer circuit 2.
As shown in Figure 3, audio frequency transformer circuit 2 comprises transformer L3, the Same Name of Ends frames connecting with headphone testing circuit 1 of the primary winding of transformer L3, the different name end ground connection of its primary winding, the Same Name of Ends of secondary winding transformer connects MP_G2 end, the different name end of secondary winding transformer connects MP_G1 end, is connected metal-oxide-semiconductor rectification circuit 3 by MP_G2 end with MP_G1 end.
The sine wave signal of 22kHz inputs audio frequency transformer circuit 2 from earphone detection circuit 1, is boosted by sine wave by transformer L3, and the signal after boosting exports metal-oxide-semiconductor rectification circuit 3 to.
As shown in Figure 4, the drain and gate that metal-oxide-semiconductor rectification circuit 3 comprises a P type metal-oxide-semiconductor Q5, the first N-type metal-oxide-semiconductor Q6, the second N-type metal-oxide-semiconductor Q7 and the 2nd P type metal-oxide-semiconductor Q8, MP_G2 hold connection the one P type metal-oxide-semiconductor Q5, the drain electrode of the first N-type metal-oxide-semiconductor Q6 and the grid of the second N-type metal-oxide-semiconductor Q7; MP_G1 holds grid and drain electrode, the grid of the first N-type metal-oxide-semiconductor Q6 and the drain electrode of the second N-type metal-oxide-semiconductor Q7 of connection the 2nd P type metal-oxide-semiconductor Q8; The source electrode of the one P type metal-oxide-semiconductor Q5 and the source electrode of the 2nd P type metal-oxide-semiconductor Q8 connect VOUT end, connect the source electrode of drive circuit 4, first N-type metal-oxide-semiconductor Q6 and the source ground of the second N-type metal-oxide-semiconductor Q7 by VOUT end.
AC signal, by metal-oxide-semiconductor rectification circuit 3, is become direct current signal by the signal after boosting.
As shown in Figure 5, drive circuit 4 comprises pressurizer U24, diode D9, the 3rd electric capacity C118, the 4th electric capacity C119, the 5th electric capacity C122, the first electrochemical capacitor C120 and the second electrochemical capacitor C121, the input VIN of pressurizer U24 connects the anode of the negative electrode of diode D9, the 3rd electric capacity C118, the 4th electric capacity C119 and the first electrochemical capacitor C120 respectively, the other end of the 3rd electric capacity C118, the 4th electric capacity C119 and the minus earth of the first electrochemical capacitor C120; The output VOUT of pressurizer U24 connects the anode of the second electrochemical capacitor C121 and one end of the 5th electric capacity C122 respectively, the negative electrode of the second electrochemical capacitor C121 and the other end ground connection of the 5th electric capacity C122; The earth terminal GND ground connection of pressurizer U24; The anode of diode D9 connects metal-oxide-semiconductor rectification circuit 3 by VOUT port.
The direct current signal that metal-oxide-semiconductor rectification circuit 3 exports, through diode D9 post filtering input pressurizer U24, finally exports the direct voltage of 3.3V, thus power to peripheral hardware accessory, achieve and directly can power, without the need to battery by mobile phone generation audio signal.
The above; be only the utility model preferably embodiment; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the change that can expect easily or replacement, all should be encompassed within protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claim.
Claims (5)
1. a mobile phone earphone interface power-supply circuit, is characterized in that: comprise
Earphone detection circuit, described earphone detection circuit is used for peripheral hardware accessory and earphone interface being carried out adaptation and audio signal being inputted from described earphone interface;
The audio frequency transformer circuit be connected with described earphone detection circuit, described audio frequency transformer circuit for receiving the audio signal of described earphone detection circuit input, and boosts to the sine wave received;
The metal-oxide-semiconductor rectification circuit be connected with described audio frequency transformer circuit, described metal-oxide-semiconductor rectification circuit is used for the AC signal after by boosting and becomes direct current signal;
The drive circuit be connected with described metal-oxide-semiconductor rectification circuit, the direct current signal that described drive circuit is used for described metal-oxide-semiconductor rectification circuit exports carries out the last output dc voltage of voltage stabilizing.
2. a kind of mobile phone earphone interface power-supply circuit according to claim 1, it is characterized in that: described earphone detection circuit comprises four sections of earphone interfaces, first resistance, first electric capacity, second resistance and the second electric capacity, 3 pin of described earphone interface connect the first resistance respectively, one end of first electric capacity and described audio frequency transformer circuit, the other end ground connection of described first resistance and the first electric capacity, 2 pin of described earphone interface connect one end of described second resistance and the second electric capacity respectively, the other end ground connection of described second resistance and the second electric capacity, 4 pin ground connection of described earphone interface.
3. a kind of mobile phone earphone interface power-supply circuit according to claim 2, it is characterized in that: described audio frequency transformer circuit comprises a transformer, the Same Name of Ends of the primary winding of described transformer connects described earphone detection circuit, the different name end ground connection of its primary winding, the Same Name of Ends of secondary winding transformer is connected described metal-oxide-semiconductor rectification circuit with different name end.
4. a kind of mobile phone earphone interface power-supply circuit according to claim 3, it is characterized in that: described metal-oxide-semiconductor rectification circuit comprises a P type metal-oxide-semiconductor, the first N-type metal-oxide-semiconductor, the second N-type metal-oxide-semiconductor and the 2nd P type metal-oxide-semiconductor, the secondary winding transformer Same Name of Ends of described transformer connects the grid of the drain and gate of a P type metal-oxide-semiconductor, the drain electrode of the first N-type metal-oxide-semiconductor and the second N-type metal-oxide-semiconductor; The secondary winding transformer different name end of described transformer connects grid and drain electrode, the grid of the first N-type metal-oxide-semiconductor and the drain electrode of the second N-type metal-oxide-semiconductor of the 2nd P type metal-oxide-semiconductor; The source electrode of the one P type metal-oxide-semiconductor and the source electrode of the 2nd P type metal-oxide-semiconductor connect described drive circuit, the source electrode of the first N-type metal-oxide-semiconductor and the source ground of the second N-type metal-oxide-semiconductor.
5. a kind of mobile phone earphone interface power-supply circuit according to claim 4, is characterized in that: described drive circuit comprises pressurizer, diode, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the first electrochemical capacitor and the second electrochemical capacitor;
The input of described pressurizer connects the negative electrode of described diode, the 3rd electric capacity and one end of the 4th electric capacity and the anode of the first electrochemical capacitor respectively, the other end of described 3rd electric capacity and the 4th electric capacity and the minus earth of described first electrochemical capacitor, the anode of described diode connects described metal-oxide-semiconductor rectification circuit;
The output of described pressurizer connects the anode of the second electrochemical capacitor and one end of the 5th electric capacity respectively, the negative electrode of described second electrochemical capacitor and the other end ground connection of described 5th electric capacity; The earth terminal ground connection of described pressurizer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420857172.6U CN204350071U (en) | 2014-12-30 | 2014-12-30 | A kind of mobile phone earphone interface power-supply circuit |
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| CN201420857172.6U CN204350071U (en) | 2014-12-30 | 2014-12-30 | A kind of mobile phone earphone interface power-supply circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108366738A (en) * | 2017-02-27 | 2018-08-03 | 深圳和而泰家居在线网络科技有限公司 | A kind of skin detection instrument and skin detection system |
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- 2014-12-30 CN CN201420857172.6U patent/CN204350071U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108366738A (en) * | 2017-02-27 | 2018-08-03 | 深圳和而泰家居在线网络科技有限公司 | A kind of skin detection instrument and skin detection system |
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