CN204408613U - A kind of earphone interface circuit - Google Patents
A kind of earphone interface circuit Download PDFInfo
- Publication number
- CN204408613U CN204408613U CN201520057390.6U CN201520057390U CN204408613U CN 204408613 U CN204408613 U CN 204408613U CN 201520057390 U CN201520057390 U CN 201520057390U CN 204408613 U CN204408613 U CN 204408613U
- Authority
- CN
- China
- Prior art keywords
- pin
- earphone
- electric capacity
- interface circuit
- signals input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model discloses a kind of earphone interface circuit, comprise earphone terminal, left channel signals input, right-channel signals input and the first voltage end; Described earphone terminal has the first pin, the second pin, the 3rd pin, the 4th pin, the 6th pin and the first elastic sheet switch; Described first pin ground connection; Described second pin is connected to right-channel signals input; Described 3rd pin is connected to left channel signals input; Described 4th pin is connected to the first voltage end; Described 6th pin ground connection; Be connected by described first elastic sheet switch between described 4th pin with described 6th pin.The utility model provides earphone interface circuit, and extract state by the insertion exporting low and high level instruction earphone, circuit is simple, is easy to realize.
Description
Technical field
The utility model belongs to electronic technology field, particularly relates to a kind of earphone interface circuit.
Background technology
At present, most electronic product (mobile phone, flat board, computer, portable electronic device etc.) carries out audio frequency output by earphone terminal frames connecting with headphone usually.And work as electronic product, not only can by loud speaker but also can by earphone output audio time, usually need to identify the insertion of earphone, switch adjustment accordingly to control internal circuit further.But existing instruction earphone inserts the circuit extracted, and often logic is complicated, is not easy to realize.
Utility model content
The purpose of this utility model is, provides a kind of earphone interface circuit, and can indicate the state that earphone terminal is in earphone insertion or extracts, circuit is simple, is easy to realize.
To achieve these goals, the utility model embodiment provides a kind of earphone interface circuit, comprises earphone terminal, left channel signals input, right-channel signals input and the first voltage end; Described earphone terminal has the first pin, the second pin, the 3rd pin, the 4th pin, the 6th pin and the first elastic sheet switch;
Described first pin ground connection;
Described second pin is connected to described right-channel signals input;
Described 3rd pin is connected to described left channel signals input;
Described 4th pin is connected to described first voltage end;
Described 6th pin ground connection;
Be connected by described first elastic sheet switch between described 4th pin with described 6th pin.
Preferably, described earphone interface circuit also comprises the first electric capacity and the second electric capacity;
Described second pin is connected to described right-channel signals input, is specially:
Described second pin is connected to described right-channel signals input by described first electric capacity;
Described 3rd pin is connected to described left channel signals input, is specially:
Described 3rd pin is connected to left channel signals input by described second electric capacity.
Described first electric capacity and described second electric capacity are preferably electrochemical capacitor.
Preferably, described earphone interface circuit also comprises the 3rd electric capacity and the 4th electric capacity;
The first end of described 3rd electric capacity is connected with described second pin, the second end ground connection of described 3rd electric capacity;
The first end of described 4th electric capacity is connected with described 3rd pin, the second end ground connection of described 3rd electric capacity.
Preferably, described earphone interface circuit also comprises the first resistance;
Described 4th pin is connected to described first voltage end, is specially:
4th pin of described earphone terminal is connected to described first voltage end by described first resistance.
Further, described earphone terminal also has the 5th pin, the 7th pin and the second elastic sheet switch;
Described 5th pin is connected to described first voltage end;
Described 7th pin ground connection;
Be connected by described second elastic sheet switch between described 5th pin with described 7th pin.
Preferably, described earphone interface circuit also comprises the 3rd resistance;
Described 5th pin is connected to described first voltage end, is specially:
Described 5th pin is connected to described first voltage end by described 3rd resistance.
The earphone interface circuit that the utility model embodiment provides, by the elastic sheet switch of earphone terminal inner, in response to headset plug insertion or extract, high level or low level is produced at the 4th pin of earphone terminal, indicate described earphone terminal to be in earphone insert or extract state, circuit is simple, is easy to realize.
The earphone interface circuit that the utility model embodiment provides, can also by the state residing for two-way level signal instruction earphone terminal, in response to headset plug insertion or extract, high level or low level can be produced at the 4th pin of earphone terminal and the 7th pin simultaneously, jointly indicate described earphone terminal to be in earphone by the two-way level signal of two pins insert or extract state, substantially increasing the reliability of circuit.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of an embodiment of the earphone interface circuit that the utility model provides;
Fig. 2 is the circuit diagram of another embodiment of the earphone interface circuit that the utility model provides.
Embodiment
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.
With reference to Fig. 1, it is the circuit diagram of an embodiment of the earphone interface circuit that the utility model provides.
As shown in Figure 1, described earphone interface circuit comprises earphone terminal J1, left channel signals input HP_L, right-channel signals input HP_R and the first voltage end VCC.Described earphone terminal has the first pin 1, second pin 2, the 3rd pin 3, the 4th pin 4, the 6th pin 6 and the first elastic sheet switch K1.
Described first pin 1 ground connection.
Described second pin 2 is connected to described right-channel signals input HP_R.Particularly, described second pin 2 is connected to described right-channel signals input HP_R by the first electric capacity C1.
Described 3rd pin 3 is connected to described left channel signals input HP_L.Particularly, described 3rd pin 3 is connected to described left channel signals input HP_L by the second electric capacity C2.
Described first electric capacity C1 and described second electric capacity C2 is preferably electrochemical capacitor.
Described 4th pin 4 is connected to described first voltage end VCC.Particularly, described 4th pin 4 is connected to described first voltage end VCC by the first resistance R1.
Described 6th pin 6 ground connection.
Be connected by described first elastic sheet switch K1 between described 4th pin 4 with described 6th pin 6.
Described first elastic sheet switch K1 drives by the insertion pull action of headset plug, and when not having headset plug to insert described earphone terminal J1, described first elastic sheet switch K1 closes.Described in when there being headset plug to insert described earphone terminal J1, the first elastic sheet switch K1 disconnects.
In the middle of concrete enforcement, described earphone interface circuit also comprises the 3rd electric capacity C3 and the 4th electric capacity C4.
The first end of described 3rd electric capacity C3 is connected with described second pin 2, the second end ground connection of described 3rd electric capacity C3.
The first end of described 4th electric capacity C4 is connected with described 3rd pin 3, the second end ground connection of described 3rd electric capacity C3.
Principle embodiment illustrated in fig. 1 is as follows:
When described earphone terminal J1 does not have earphone to insert, first elastic sheet switch K1 closes, 4th pin 4 of described earphone terminal J1 is connected with the internal circuit of the 6th pin 6 by earphone terminal J1, and terminals P H_DET_R produces low level, indicates described earphone terminal J1 to be in earphone and extracts state.When described earphone terminal J1 has earphone to insert, described first elastic sheet switch K1 disconnects, and the 4th pin 4 of described earphone terminal J1 is pulled to the first voltage, and terminals P H_DET_R produces high level, indicates described earphone terminal J1 to be in earphone insert state.
Further, when detecting that earphone inserts described earphone terminal J1, audio signal can be inputted by left and right acoustic channels input HP_R and HP_L, through the first electric capacity C1 and the second electric capacity C2 every straight decoupling, again after the 3rd electric capacity C3 and the 4th electric capacity C4 carries out filtering, earphone is outputted to from second pin 2 of earphone terminal J1 and the 3rd pin 3, direct current impact is cut off by the first electric capacity C1 and the second electric capacity C2, improve tonequality, prevent earphone from being damaged by direct current signal simultaneously, remove noise effect by the 3rd electric capacity C3 and the 4th electric capacity C4, improve Consumer's Experience.
With reference to Fig. 2, it is the circuit diagram of another embodiment of the earphone interface circuit that the utility model provides.
As shown in Figure 2, on basis embodiment illustrated in fig. 1, described earphone terminal also has the 5th pin 5, the 7th pin 7 and the second elastic sheet switch K2.
Described 5th pin 5 is connected to described first voltage end VCC.Particularly, described 5th pin 5 is connected to described first voltage end VCC by the 3rd resistance R3.
Described 7th pin 7 ground connection.
Be connected by described second elastic sheet switch K2 between described 5th pin 5 with described 7th pin 7.
Described second elastic sheet switch K2 drives by the insertion pull action of headset plug, and when not having headset plug to insert described earphone terminal J1, described second elastic sheet switch K2 closes.Described in when there being headset plug to insert described earphone terminal J1, the second elastic sheet switch K2 disconnects.
Principle embodiment illustrated in fig. 2 is as follows:
When described earphone terminal J1 does not have earphone to insert, the first elastic sheet switch K1 and the second elastic sheet switch K2 is all closed, and terminals P H_DET_R and terminals P H_DET_L produces low level simultaneously, indicates described earphone terminal J1 to be in earphone and extracts state.When described earphone terminal J1 has earphone to insert, the first elastic sheet switch K1 and the second elastic sheet switch K2 all disconnects, and terminals P H_DET_R and terminals P H_DET_L produces high level simultaneously, indicates described earphone terminal J1 to be in earphone insert state.And when the level of terminals P H_DET_R and terminals P H_DET_L generation is asynchronous, namely one of them terminal produces high level, when another terminal produces low level, represent that the earphone insert state of described earphone terminal J1 is abnormal, loose contact may be there is between earphone terminal and headset plug or other cause abnormal situation.
Embodiment illustrated in fig. 2ly produce high level or low level by terminals P H_DET_R and terminals P H_DET_L simultaneously, the earphone of instruction earphone terminal J1 inserts or extracts state, and can when earphone insert state is abnormal, one high and one low level is produced by terminals P H_DET_R and terminals P H_DET_L, abnormal to point out the contact between described earphone terminal J1 and headset plug to exist, further increasing the reliability of circuit.
The above is preferred implementation of the present utility model; certainly the interest field of the utility model can not be limited with this; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle; can also make some improvement and variation, these improve and variation is also considered as protection range of the present utility model.
Claims (7)
1. an earphone interface circuit, is characterized in that, comprises earphone terminal, left channel signals input, right-channel signals input and the first voltage end; Described earphone terminal has the first pin, the second pin, the 3rd pin, the 4th pin, the 6th pin and the first elastic sheet switch;
Described first pin ground connection;
Described second pin is connected to described right-channel signals input;
Described 3rd pin is connected to described left channel signals input;
Described 4th pin is connected to described first voltage end;
Described 6th pin ground connection;
Be connected by described first elastic sheet switch between described 4th pin with described 6th pin.
2. earphone interface circuit as claimed in claim 1, it is characterized in that, described earphone interface circuit also comprises the first electric capacity and the second electric capacity;
Described second pin is connected to described right-channel signals input, is specially:
Described second pin is connected to described right-channel signals input by described first electric capacity;
Described 3rd pin is connected to described left channel signals input, is specially:
Described 3rd pin is connected to left channel signals input by described second electric capacity.
3. earphone interface circuit as claimed in claim 2, it is characterized in that, described first electric capacity and described second electric capacity are electrochemical capacitor.
4. earphone interface circuit as claimed in claim 3, it is characterized in that, described earphone interface circuit also comprises the 3rd electric capacity and the 4th electric capacity;
The first end of described 3rd electric capacity is connected with described second pin, the second end ground connection of described 3rd electric capacity;
The first end of described 4th electric capacity is connected with described 3rd pin, the second end ground connection of described 3rd electric capacity.
5. earphone interface circuit as claimed in claim 4, it is characterized in that, described earphone interface circuit also comprises the first resistance;
Described 4th pin is connected to described first voltage end, is specially:
4th pin of described earphone terminal is connected to described first voltage end by described first resistance.
6. earphone interface circuit as claimed in claim 5, it is characterized in that, described earphone terminal also has the 5th pin, the 7th pin and the second elastic sheet switch;
Described 5th pin is connected to described first voltage end;
Described 7th pin ground connection;
Be connected by described second elastic sheet switch between described 5th pin with described 7th pin.
7. earphone interface circuit as claimed in claim 6, it is characterized in that, described earphone interface circuit also comprises the 3rd resistance;
Described 5th pin is connected to described first voltage end, is specially:
Described 5th pin is connected to described first voltage end by described 3rd resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520057390.6U CN204408613U (en) | 2015-01-27 | 2015-01-27 | A kind of earphone interface circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520057390.6U CN204408613U (en) | 2015-01-27 | 2015-01-27 | A kind of earphone interface circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204408613U true CN204408613U (en) | 2015-06-17 |
Family
ID=53432441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520057390.6U Active CN204408613U (en) | 2015-01-27 | 2015-01-27 | A kind of earphone interface circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204408613U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107426815A (en) * | 2017-07-13 | 2017-12-01 | 成都天奥电子股份有限公司 | A kind of instrument supervisory systems and its method of work based on indoor positioning technologies |
-
2015
- 2015-01-27 CN CN201520057390.6U patent/CN204408613U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107426815A (en) * | 2017-07-13 | 2017-12-01 | 成都天奥电子股份有限公司 | A kind of instrument supervisory systems and its method of work based on indoor positioning technologies |
| CN107426815B (en) * | 2017-07-13 | 2021-03-23 | 成都天奥电子股份有限公司 | Instrument supervision system based on indoor positioning technology and working method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101783986B (en) | Earphone interface circuit and electronic equipment | |
| CN204090123U (en) | Audio output control circuit and audio-frequence player device | |
| CN101742383B (en) | Device and method for eliminating plosives of headset | |
| CN102740181B (en) | Earphone interface circuit and electronic equipment | |
| CN205071294U (en) | Headphone structure circuit, earphone, audio output device and display device | |
| CN201750528U (en) | Audio processing device | |
| CN202503657U (en) | Earphone socket circuit, and portable terminal applying the same | |
| CN103414984A (en) | System for eliminating explosion sound of earphones | |
| CN205017561U (en) | Electronic equipment and suppression circuit of earphone plug plosive thereof | |
| CN105142072B (en) | A kind of audio devices and audio frequency playing method of external player | |
| CN204408613U (en) | A kind of earphone interface circuit | |
| US20130259276A1 (en) | Earphone jack and earphone interface circuit and electronic device | |
| CN105187992A (en) | Microphone switch control circuit and method | |
| CN105047212A (en) | Audio play circuit and player | |
| CN107864422A (en) | Playback equipment and the player method based on playback equipment | |
| CN204836109U (en) | Battery earphone outage control circuit that resets | |
| CN107800853B (en) | Memory, mobile phone, audio circuit thereof and method for externally playing audio file | |
| CN204721585U (en) | Receiver amplifier | |
| CN106412760B (en) | Earphone compatible device | |
| CN202721807U (en) | Earphone interface circuit and electronic equipment | |
| CN203416396U (en) | Intelligent terminal earphone association circuit | |
| CN203027365U (en) | Audio output control circuit and TV set | |
| CN207530996U (en) | A kind of active audio amplifier with overcurrent protection function | |
| CN202103828U (en) | Switching circuit with speaker output being compatible to earphone output and earphone input | |
| CN201438749U (en) | Circuit for inhibiting switching noise of audio device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |