CN202721728U - Mobile phone and audio amplification output circuit thereof - Google Patents
Mobile phone and audio amplification output circuit thereof Download PDFInfo
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- CN202721728U CN202721728U CN 201220261274 CN201220261274U CN202721728U CN 202721728 U CN202721728 U CN 202721728U CN 201220261274 CN201220261274 CN 201220261274 CN 201220261274 U CN201220261274 U CN 201220261274U CN 202721728 U CN202721728 U CN 202721728U
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- inductance
- mobile phone
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Abstract
The utility model relates to a mobile phone and an audio amplification output circuit thereof. The utility model provides the mobile phone and the audio amplification output circuit thereof, an output signal of an audio amplifier in the mobile phone is directly connected to an interface unit of the mobile phone, the interface unit is connected with an external speaker device, an amplified audio signal is provided to the external speaker device, an audio amplifying circuit and a power supply in a traditional external mobile phone speaker can be saved, cost is low, and the mobile phone is convenient to carry.
Description
Technical field
The utility model belongs to the mobile communication terminal field, relates in particular to a kind of mobile phone and audio amplification output circuit thereof.
Background technology
Now on the market mobile phone generally has audio output interface, stereo set that can the externally connected portable formula.This type of portable sound equipment also all is the low-power audio signal that the access mobile phone is exported to earphone, but this signal can't directly drive external sound equipment because power is low, this just needs external stereo set itself to comprise an audio frequency amplifier, in external sound equipment the audio signal of mobile phone output is amplified.But as such method for designing, external stereo set needs the extra audio frequency amplifier that increases, and must also need to increase a power-supply device provides power supply to audio frequency amplifier.In fact, interior of mobile phone also has audio frequency amplifier and the power supply of oneself, increases extra audio frequency amplifier and power supply in external sound equipment, has both increased extra cost, and newly-increased parts also can cause carrying inconvenience simultaneously.
The utility model content
The purpose of this utility model is to provide a kind of audio amplification output circuit of mobile phone, and when having mobile phone external portable audio equipment now to solve, outer audio frequency amplifier and the power supply of the necessary plus of stereo set itself increases cost and carry inconvenient problem.
The technical scheme that the utility model adopts is: a kind of handset audio amplification output circuit comprises:
Link to each other with the low-power audio signal output part of interior of mobile phone, described audio signal is carried out the first filter unit that filtering is processed;
Link to each other with the output of described the first filter unit, the control amplifying unit of processing is controlled and amplified to the audio signal after processing through filtering;
Link to each other with described control amplifying unit, the audio signal after amplifying is proceeded the second filter unit of filtering conversion; And
Link to each other with the second filter unit, the audio signal of described the second filter unit output is imported the interface unit of mobile phone external stereo set.
Particularly, described the first filter unit comprises capacitor C 1 and resistance R 1; Described capacitor C 1 is serially connected between the first end of the low-power audio signal output part of described interior of mobile phone and described resistance R 1, and the second end of described resistance R 1 is the output of described the first filter unit.
Particularly, described control amplifying unit comprises a power amplifier chips U1, capacitor C 2, capacitor C 3, capacitor C 4, resistance R 2 and resistance R 3; The first input end of described power amplifier chips U1 connects the output of described the first filter unit, the second input of described power amplifier chips U1 is successively by described resistance R 2, capacitor C 2 ground connection, the power port of described power amplifier chips U1 connects the first end of DC power supply VDD and described capacitor C 4 simultaneously, the second end ground connection of described capacitor C 4, the control port of described power amplifier chips U1 connects the first end of control signal source and described resistance R 3 simultaneously, the second end ground connection of described resistance R 3, the reference voltage input terminal of described power amplifier chips U1 is by described capacitor C 3 ground connection, and the first output of described power amplifier chips U1 and the second output are respectively the first output and second output of described control amplifying unit.
Particularly, described the second filter unit comprises inductance L 1, inductance L 2, capacitor C 5, capacitor C 6 and capacitor C 7; The first end of described inductance L 1 is the first input end of described the second filter unit, connect the first output of described control amplifying unit, the second end of described inductance L 1 is the first output of described the second filter unit, the first end of described inductance L 2 is the second input of described the second filter unit, connect the second output of described control amplifying unit, the second end of described inductance L 2 is the second output of described the second filter unit, described capacitor C 5 is connected between second end and ground of described inductance L 1, described capacitor C 7 is connected between second end and ground of described inductance L 2, and described capacitor C 6 is connected between the second end of the second end of described inductance L 1 and described inductance L 2.
Particularly, described interface unit comprises an I/O chip U2, two inputs of described I/O chip U2 connect respectively the first output and second output of described the second filter unit, described I/O chip U2 output link to each other with external stereo set.
Further, described the second filter unit also comprises electrostatic impedor T1 and electrostatic impedor T2; The second end of the described inductance L 1 of the first termination of described electrostatic impedor T1, the second end of the described inductance L 2 of the first termination of described electrostatic impedor T2, the second end of described electrostatic impedor T1 and the second end of described electrostatic impedor T2 be ground connection all.
Another purpose of the present utility model is to provide a kind of mobile phone, and described mobile phone comprises the audio amplification output circuit under above-mentioned any form.
The mobile phone that the utility model provides and audio amplification output circuit thereof, the output signal of interior of mobile phone audio frequency amplifier directly is connected to the interface unit that mobile phone and external stereo set join, the audio signal of amplification is provided for external stereo set, audio amplifier circuit and power supply in traditional connecting with external mobile phone sound equipment that can save, cost is lower, it is more convenient to carry.
Description of drawings
Fig. 1 is the structured flowchart of the handset audio amplification output circuit that provides of the utility model embodiment;
Fig. 2 is the electronic devices and components exemplary plot of the handset audio amplification output circuit that provides of the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, 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 explaining the utility model, and be not used in restriction the utility model.
The mobile phone that the utility model provides and audio amplification output circuit thereof, the output signal of interior of mobile phone audio frequency amplifier directly is connected to the interface unit that mobile phone and external stereo set join, the audio signal of amplification is provided for external stereo set, audio amplifier circuit and power supply in traditional connecting with external mobile phone sound equipment that can save, cost is lower, it is more convenient to carry.
Fig. 1 is the structured flowchart of the handset audio amplification output circuit that provides of the utility model embodiment; For convenience of explanation, only show the part relevant with the utility model embodiment, as shown in the figure:
A kind of handset audio amplification output circuit comprises the first filter unit 100, control amplifying unit 200, the second filter unit 300 and the interface unit 400 that link to each other successively;
Wherein, the first filter unit 100 links to each other with the low-power audio signal output part MP3-OUT port of interior of mobile phone, audio signal is carried out the filtering first time process; Control amplifying unit 200 links to each other with the output of the first filter unit 100, and the audio signal after filtering processing is controlled and amplified processing; The second filter unit 300 links to each other with control amplifying unit 200, and the audio signal after amplifying is proceeded the filtering conversion; Interface unit 400 links to each other with the second filter unit 300, with the audio signal importing mobile phone external stereo set Speaker of the second filter unit 300 outputs.
Fig. 2 is the electronic devices and components exemplary plot of the handset audio amplification output circuit that provides of the utility model embodiment; For convenience of explanation, only show the part relevant with the utility model embodiment, as shown in the figure:
As an embodiment of the present utility model, the first filter unit 100 comprises capacitor C 1 and resistance R 1; Capacitor C 1 is serially connected between the first end of the low-power audio signal output part MP3-OUT of interior of mobile phone and resistance R 1, and the second end of resistance R 1 is the output of the first filter unit 100.
As an embodiment of the present utility model, control amplifying unit 200 comprises a power amplifier chips U1, capacitor C 2, capacitor C 3, capacitor C 4, resistance R 2 and resistance R 3; The first input end IN+ of power amplifier chips U1 connects the output of the first filter unit 100, the second input IN-of power amplifier chips U1 is successively by resistance R 2, capacitor C 2 ground connection, the power port VDD of power amplifier chips U1 connects the first end of DC power supply VDD and capacitor C 4 simultaneously, the second end ground connection of capacitor C 4, the control port CTRL of power amplifier chips U1 connects the first end of control signal source SPK-EN and resistance R 3 simultaneously, the second end ground connection of resistance R 3, the reference voltage input terminal VREF of power amplifier chips U1 is by capacitor C 3 ground connection, and the first output OUT+ of power amplifier chips U1 and the second output OUT-are respectively the first output and second output of control amplifying unit 200.
As an embodiment of the present utility model, the second filter unit 300 comprises inductance L 1, inductance L 2, capacitor C 5, capacitor C 6 and capacitor C 7; The first end of inductance L 1 is the first input end of the second filter unit 300, connect the first output of control amplifying unit 200, the second end of inductance L 1 is the first output of the second filter unit 300, the first end of inductance L 2 is the second input of the second filter unit 300, connect the second output of control amplifying unit 200, the second end of inductance L 2 is the second output of the second filter unit 300, capacitor C 5 is connected between second end and ground of inductance L 1, capacitor C 7 is connected between second end and ground of inductance L 2, and capacitor C 6 is connected between the second end of the second end of inductance L 1 and inductance L 2.
As an embodiment of the present utility model, interface unit 400 comprises an I/O chip U2, two inputs of I/O chip U2 connect respectively the first output and second output of the second filter unit 300, I/O chip U2 output link to each other with external stereo set Speaker.Need to prove that during Speaker herein is not limited to illustrate one can be two or more.
As an embodiment of the present utility model, the second filter unit 400 also comprises electrostatic impedor T1 and electrostatic impedor T2; The second end of the first termination inductance L 1 of electrostatic impedor T1, the second end of the first termination inductance L 2 of electrostatic impedor T2, the second end of electrostatic impedor T1 and the second end of electrostatic impedor T2 be ground connection all.
Further, another embodiment of the present utility model also provides a kind of mobile phone that comprises the audio amplification output circuit that above-mentioned arbitrary embodiment provides.
The mobile phone that the utility model provides and audio amplification output circuit thereof directly are connected to the interface unit that mobile phone and external stereo set join with the output signal of interior of mobile phone audio frequency amplifier, and the audio signal of amplification is provided for external stereo set.Because the audio amplifier circuit of interior of mobile phone is essential, the utility model embodiment directly adopts the audio amplifier circuit of interior of mobile phone to provide the audio signal that is enough to drive sound equipment to external stereo set, audio amplifier circuit and power supply in traditional connecting with external mobile phone sound equipment that can save, cost is lower, it is more convenient to carry.Certainly, external sound equipment must dispose the plug that is complementary with handset port, notices simultaneously that the rated power of audio frequency amplifier of interior of mobile phone and peripheral loudspeaker rated power are complementary to get final product.
The above only is preferred embodiment of the present utility model, not in order to limit the utility model, although with reference to previous embodiment the utility model has been carried out more detailed explanation, for a person skilled in the art, it still can be made amendment or part technical characterictic wherein is equal to replacement the technical scheme that aforementioned each embodiment puts down in writing.All any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (7)
1. a handset audio amplification output circuit is characterized in that, described circuit comprises:
Link to each other with the low-power audio signal output part of interior of mobile phone, described audio signal is carried out the first filter unit that filtering is processed;
Link to each other with the output of described the first filter unit, the control amplifying unit of processing is controlled and amplified to the audio signal after processing through filtering;
Link to each other with described control amplifying unit, the audio signal after amplifying is proceeded the second filter unit of filtering conversion; And
Link to each other with the second filter unit, the audio signal of described the second filter unit output is imported the interface unit of mobile phone external stereo set.
2. handset audio amplification output circuit as claimed in claim 1 is characterized in that, described the first filter unit comprises capacitor C 1 and resistance R 1;
Described capacitor C 1 is serially connected between the first end of the low-power audio signal output part of described interior of mobile phone and described resistance R 1, and the second end of described resistance R 1 is the output of described the first filter unit.
3. handset audio amplification output circuit as claimed in claim 1 is characterized in that, described control amplifying unit comprises a power amplifier chips U1, capacitor C 2, capacitor C 3, capacitor C 4, resistance R 2 and resistance R 3;
The first input end of described power amplifier chips U1 connects the output of described the first filter unit, the second input of described power amplifier chips U1 is successively by described resistance R 2, capacitor C 2 ground connection, the power port of described power amplifier chips U1 connects the first end of DC power supply VDD and described capacitor C 4 simultaneously, the second end ground connection of described capacitor C 4, the control port of described power amplifier chips U1 connects the first end of control signal source and described resistance R 3 simultaneously, the second end ground connection of described resistance R 3, the reference voltage input terminal of described power amplifier chips U1 is by described capacitor C 3 ground connection, and the first output of described power amplifier chips U1 and the second output are respectively the first output and second output of described control amplifying unit.
4. handset audio amplification output circuit as claimed in claim 1 is characterized in that, described the second filter unit comprises inductance L 1, inductance L 2, capacitor C 5, capacitor C 6 and capacitor C 7;
The first end of described inductance L 1 is the first input end of described the second filter unit, connect the first output of described control amplifying unit, the second end of described inductance L 1 is the first output of described the second filter unit, the first end of described inductance L 2 is the second input of described the second filter unit, connect the second output of described control amplifying unit, the second end of described inductance L 2 is the second output of described the second filter unit, described capacitor C 5 is connected between second end and ground of described inductance L 1, described capacitor C 7 is connected between second end and ground of described inductance L 2, and described capacitor C 6 is connected between the second end of the second end of described inductance L 1 and described inductance L 2.
5. handset audio amplification output circuit as claimed in claim 1, it is characterized in that, described interface unit comprises an I/O chip U2, two inputs of described I/O chip U2 connect respectively the first output and second output of described the second filter unit, described I/O chip U2 output link to each other with external stereo set.
6. handset audio amplification output circuit as claimed in claim 4 is characterized in that, described the second filter unit also comprises electrostatic impedor T1 and electrostatic impedor T2;
The second end of the described inductance L 1 of the first termination of described electrostatic impedor T1, the second end of the described inductance L 2 of the first termination of described electrostatic impedor T2, the second end of described electrostatic impedor T1 and the second end of described electrostatic impedor T2 be ground connection all.
7. a mobile phone is characterized in that, described mobile phone comprises each described handset audio amplification output circuit such as claim 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220261274 CN202721728U (en) | 2012-06-05 | 2012-06-05 | Mobile phone and audio amplification output circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220261274 CN202721728U (en) | 2012-06-05 | 2012-06-05 | Mobile phone and audio amplification output circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202721728U true CN202721728U (en) | 2013-02-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220261274 Expired - Fee Related CN202721728U (en) | 2012-06-05 | 2012-06-05 | Mobile phone and audio amplification output circuit thereof |
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| Country | Link |
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| CN (1) | CN202721728U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106792359A (en) * | 2017-01-10 | 2017-05-31 | 惠州Tcl移动通信有限公司 | A kind of electronic equipment and its audio power amplification system |
| CN111385717A (en) * | 2018-12-29 | 2020-07-07 | 比亚迪股份有限公司 | Audio output circuit and mobile terminal |
-
2012
- 2012-06-05 CN CN 201220261274 patent/CN202721728U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106792359A (en) * | 2017-01-10 | 2017-05-31 | 惠州Tcl移动通信有限公司 | A kind of electronic equipment and its audio power amplification system |
| CN106792359B (en) * | 2017-01-10 | 2020-03-06 | 惠州Tcl移动通信有限公司 | Electronic equipment and audio power amplifier system thereof |
| CN111385717A (en) * | 2018-12-29 | 2020-07-07 | 比亚迪股份有限公司 | Audio output circuit and mobile terminal |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130206 Termination date: 20170605 |
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| CF01 | Termination of patent right due to non-payment of annual fee |