CN203457142U - Audio signal transmitting circuit and mobile terminal - Google Patents
Audio signal transmitting circuit and mobile terminal Download PDFInfo
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- CN203457142U CN203457142U CN201320570792.7U CN201320570792U CN203457142U CN 203457142 U CN203457142 U CN 203457142U CN 201320570792 U CN201320570792 U CN 201320570792U CN 203457142 U CN203457142 U CN 203457142U
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- audio signal
- audio
- signal transmitting
- transmitting circuit
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Abstract
The utility model discloses an audio signal transmitting circuit and a mobile terminal. The audio signal transmitting circuit comprises an audio interface and a master control chip, a microphone pin of the audio interface is connected with an I/O port of the master control chip via an audio signal transmitting module, and a grounding GND pin of the audio interface is connected with a grounding GND port of the master control chip. The audio signal transmitting circuit and the mobile terminal have the beneficial effects that digital signals of the master control chip are converted into analog signals by charging and discharging a capacitor C1 in the audio signal transmitting module, signal strength is increased, and the signals can be received and decoded by an audio signal receiving device conveniently.
Description
Technical field
The utility model relates to electronic applications, refers more particularly to a kind of audio signal transmitting circuit and mobile terminal.
Background technology
Along with scientific and technological development, mobile phone terminal is more and more intelligent, making mobile phone is not merely a means of communication, the multifunctional application such as more integrated amusement, network, the handy service for the people are in one, become indispensable instrument in daily life, the handset audio communication recently realizing increases mobile communication function once again.Now increasing application can be communicated by letter with external equipment by handset audio mouth.In existing technology, adopt main control chip IO mouth to send and after electric capacity stopping direct current, directly pass to handset audio mouth, mobile phone application changes and judges data bit 1 and data bit 0 according to the height of receiving waveform.
In the technical scheme of prior art, the applicant finds following technical problem: if simple employing electric capacity directly passes to handset audio mouth after straight in existing technical scheme, the resolution of signal is very low, and mobile phone decoding rate declines.Main control chip IO mouth level just changes easily mobile phone hardware is caused damage simultaneously.
Utility model content
For the problem in correlation technique, the utility model proposes a kind of audio signal transmitting circuit and mobile terminal, for solving the audio signal of mobile terminal external audio frequency equipment, send problem.
The technical solution of the utility model is achieved in that
According to an aspect of the present utility model, a kind of audio signal transmitting circuit is provided, this audio signal transmitting circuit comprises: audio interface and main control chip, Mike's pin of described audio interface is connected with an IO mouth of described main control chip by audio signal sending module, and the ground connection GND pin of described audio interface is connected with the ground connection GND mouth of described main control chip.
Preferably, described audio-frequency information sending module comprises capacitor C 1 and the resistance R 1 of series connection, and the diode that is connected to the one or more series connection on the circuit between capacitor C 1 and resistance R 1, wherein, is positioned at the minus earth of the described diode of earth terminal.
Preferably, the number of described diode is one.
Preferably, the negative electrode of described diode is connected with the ground connection GND mouth of described main control chip.
Preferably, described audio interface is audio jack or audio socket.
The utility model also provides a kind of mobile terminal, comprises above-mentioned any audio signal transmitting circuit.
The utility model converts the digital signal of main control chip to analog signal by discharging and recharging of the capacitor C 1 in audio signal sending module, has improved the intensity of signal, is convenient to audio signal receiving system and receives and decode.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is according to the schematic diagram of the audio signal transmitting circuit of the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, the every other embodiment that those of ordinary skills obtain, belongs to the scope that the utility model is protected.
According to embodiment of the present utility model, provide a kind of audio signal transmitting circuit.
As shown in Figure 1, according to a kind of audio signal transmitting circuit of providing of the utility model embodiment, this audio signal transmitting circuit comprises: audio interface and main control chip, Mike's pin of audio interface is connected with an IO mouth of main control chip by audio signal sending module, and the ground connection GND pin of audio interface is connected with the ground connection GND mouth of main control chip.
In the above-described embodiments, the digital signal by audio signal sending module, main control chip being sent is converted into analog signal and is sent to audio interface.Audio signal sending module wherein comprises: the capacitor C 1 of series connection and resistance R 1, and be connected between capacitor C 1 and resistance R 1 and the diode of one or more series connection of ground connection, wherein, capacitor C 1 is connected with Mike's pin of audio interface, resistance R 1 is connected with any IO mouth of main control chip, is positioned at the minus earth of the described diode of earth terminal.
In use, main control chip IO1 mouth is output as when high, capacitor C 1 charging, audio interface terminal voltage raises, when main control chip IO1 is output as when low, and capacitor C 1 electric discharge, audio interface terminal voltage declines, thereby realize, the digital signal of main control chip output is changed into analog signal, and improved the intensity of signal, be convenient to audio signal receiving system and receive and decode.
In the above-described embodiments, as a kind of preferred version, the number of diode adopts one, by a diode, can be grounded, and has reduced the cost of whole audio frequency transtation mission circuit.
Concrete, the negative electrode of diode is connected with the ground connection GND mouth of main control chip, by connecting, has realized diode cathode ground connection between the two, meanwhile, has also simplified audio frequency transtation mission circuit, has reduced the cost of audio frequency transtation mission circuit, and now, concrete structure is; The first pin of capacitor C 1 is connected to audio interface Mike pin, and the second pin connects the anode of diode D1, and the negative electrode of diode D1 is connected with GND, the first pin of resistance R 1 and the anodic bonding of diode D1, the second pin with main control chip IO mouth be connected.
In the above-described embodiments, audio interface is audio jack or audio socket, and it can be determined according to the needs of actual production.
The utility model also provides a kind of mobile terminal, comprises above-mentioned any audio signal transmitting circuit.This mobile terminal can be the common mobile terminals such as mobile phone, panel computer, has the digital signal of main control chip is changed into analog signal, and improve the intensity of analog signal.
In sum, by means of technique scheme of the present utility model, by signal transmitting module, the digital signal of main control chip is changed into analog signal, and improve the intensity of analog signal.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (6)
1. an audio signal transmitting circuit, it is characterized in that, comprise audio interface and main control chip, Mike's pin of described audio interface is connected with an IO mouth of described main control chip by audio signal sending module, and the ground connection GND pin of described audio interface is connected with the ground connection GND mouth of described main control chip.
2. audio signal transmitting circuit according to claim 1, it is characterized in that, described audio-frequency information sending module comprises capacitor C 1 and the resistance R 1 of series connection, and the diode that is connected to the one or more series connection on the circuit between capacitor C 1 and resistance R 1, wherein, be positioned at the minus earth of the described diode of earth terminal.
3. audio signal transmitting circuit according to claim 2, is characterized in that, the number of described diode is one.
4. audio signal transmitting circuit according to claim 3, is characterized in that, the negative electrode of described diode is connected with the ground connection GND mouth of described main control chip.
5. according to the audio signal transmitting circuit described in claim 1-4 any one, it is characterized in that, described audio interface is audio jack or audio socket.
6. a mobile terminal, is characterized in that, comprises the audio signal transmitting circuit as described in claim 1-5 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320570792.7U CN203457142U (en) | 2013-09-13 | 2013-09-13 | Audio signal transmitting circuit and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320570792.7U CN203457142U (en) | 2013-09-13 | 2013-09-13 | Audio signal transmitting circuit and mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203457142U true CN203457142U (en) | 2014-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320570792.7U Expired - Fee Related CN203457142U (en) | 2013-09-13 | 2013-09-13 | Audio signal transmitting circuit and mobile terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203457142U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105049998A (en) * | 2015-07-07 | 2015-11-11 | 北京医康世纪科技有限公司 | Audio communication device |
| CN106708741A (en) * | 2017-01-22 | 2017-05-24 | 百度在线网络技术（北京）有限公司 | Voice application test method and system |
-
2013
- 2013-09-13 CN CN201320570792.7U patent/CN203457142U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105049998A (en) * | 2015-07-07 | 2015-11-11 | 北京医康世纪科技有限公司 | Audio communication device |
| CN105049998B (en) * | 2015-07-07 | 2019-01-18 | 北京医康世纪科技有限公司 | A kind of audio communication device |
| CN106708741A (en) * | 2017-01-22 | 2017-05-24 | 百度在线网络技术（北京）有限公司 | Voice application test method and system |
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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 |
Granted publication date: 20140226 Termination date: 20180913 |
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| CF01 | Termination of patent right due to non-payment of annual fee |