CN201774654U - Wire headset circuit based on mobile phone four-section connection - Google Patents
Wire headset circuit based on mobile phone four-section connection Download PDFInfo
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- CN201774654U CN201774654U CN2010202646843U CN201020264684U CN201774654U CN 201774654 U CN201774654 U CN 201774654U CN 2010202646843 U CN2010202646843 U CN 2010202646843U CN 201020264684 U CN201020264684 U CN 201020264684U CN 201774654 U CN201774654 U CN 201774654U
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Abstract
The utility model is applicable to the field of headsets and provides a wire headset circuit based on mobile phone four-section connection. The wire headset circuit comprises a mobile phone part and a headset part, wherein the headset part is connected with the mobile phone part through a headset interface; the mobile phone part comprises a main microphone input and an analogue digital conversion ADC detection circuit; and the headset part comprises an analogue switch power management circuit, a microphone and key isolated circuit, a key control logic circuit and an analogue digital control logic circuit. For the wire headset based on mobile phone four-section connection, the microphone and the key circuit are isolated through the analogue switch, the microphone bias is serially connected with a resistor and a diode and parallelly connected with a capacitor or a backup battery so as to be taken as an analogue switch working power supply; and for the key detection, the diode group and the resistor group are used for realizing wire relationship so as to be taken as the analogue switch control of a plurality of key detections. The circuit has the advantages of being stable and reliable, being simple in software implementation and low in cost and having no interference signals.
Description
Technical field
The utility model relates to the mobile phone technique field, relates in particular to a kind of line control earphone circuit that connects based on four-part form on the mobile phone.
Background technology
At present, develop rapidly along with the communication technology, people require more and more higher to the amusement of mobile phone, emerged in large numbers the mobile phone that much has MP3, MP4 function on the market, earphone also becomes the standard configuration of mobile phone, and, also increased the demand of standard four-part form interface and many buttons line traffic control function for the mobile phone products of the music function of giving prominence to the key points.To this, the earphone design time need be considered following feature: four-part form standard interface (having only 4 connecting lines), possess left and right acoustic channels, microphone talked about function normal, can discern a plurality of buttons, outer microphone and ear microphone and not influence button and discern.
In the prior art, realize the earphone of line traffic control function, their common ground is the connected mode of earphone left and right acoustic channels and earth signal line, and does not have line control earphone the same.Realize that on the four-part form earphone line control push-button function implementation can classify as two types, a kind ofly be: each button is connected behind at least one resistance, and is in parallel with the input end; Be connected with above-mentioned input end and power by detecting power supply.On the earphone each button with detect the loop that power supply forms in the resistance number all different, so just can when button is triggered, be triggered to know which button by detection voltage.Another is: the input of button control logic module links to each other with each button, and output links to each other with the Dual Tone Multifrequency combiner circuit, when detecting that a button is pressed, sends corresponding control signal to the DTMF combiner circuit; The DTMF combiner circuit is in parallel with microphone, after receiving control information, generates corresponding dtmf signal and sends to the terminal that links to each other with earphone.
The shortcoming of prior art: above-mentioned two kinds of implementations, a kind of do not have a microphone call function, and another realizes that cost is too high, and that software is realized is complicated, product design is improper, is easy to generate the interference sensitive signal.
The utility model content
The purpose of this utility model is to provide a kind of line control earphone circuit that connects based on four-part form on the mobile phone, be intended to solve in the prior art on same four-part form earphone, on the function basis of realizing normal left and right acoustic channels playing back music and normal microphone conversation, realize the problem of the circuit of a plurality of button recognition functions.
The utility model embodiment is achieved in that a kind of line control earphone circuit that connects based on four-part form on the mobile phone, comprising: mobile phone part and earphone portion, and earphone portion partly is connected with mobile phone by earphone interface;
Described mobile phone partly comprises main microphone input and analog digital conversion ADC testing circuit, and described earphone portion comprises: analog switched power supply management circuit, microphone and button buffer circuit, button control logic circuit and analog switch control logic circuit.
Wherein, microphone and button detection signal end are directly connected to microphone input and ADC input on the mobile phone CPU on described main microphone input and the ADC testing circuit.
Wherein, microphone and button detection signal end are connected respectively to microphone input and ADC input on the mobile phone CPU through first analog switch on described main microphone input and the ADC testing circuit.
Wherein, described microphone links to each other with the signal input part of second analog switch with button detection signal end, link to each other with the button control logic circuit with the button buffer circuit with microphone respectively through second analog switch, analog switched power supply management circuit one end links to each other with button detection signal end with microphone, and the other end links to each other with the power end of second analog switch.
Wherein, described button control logic circuit is included in simulation switch key end one group of resistance R 1 in parallel, R2...Rn on the earphone, mechanical switch button KY1, KY2...KYn on each resistance series connection corresponding line, and the mechanical switch button other end is received on the earth signal line.
Wherein, described analog switch control logic circuit is included on microphone and the button detection signal end according to the number of button one group of resistance R 10 in parallel, R11...R1n, series diode group VD10, VD11...VD1n on the resistance circuit, the negative pole of diode group are connected to the resistance and the mechanical switch button intersection of respective keys; Draw the control end of holding wire from the intersection of resistor group and its diode in series group to second analog switch.
Wherein, described analog switched power supply management circuit is made up of series resistance R0, series diode VD1 and shunt capacitance C1.
Wherein, described analog switched power supply management circuit is made up of series resistance R0, series diode VD1 and backup battery.
The utility model embodiment compared with prior art, beneficial effect is: the line control earphone that four-part form connects on the mobile phone is to isolate microphone and button circuit by analog switch, and microphone bias voltage series resistance and diode and shunt capacitance or backup battery are as the analog switch working power.Button detects and uses diode group and resistor group to realize line and relation, controls as the analog switch that a plurality of buttons detect.This realization circuit one is reliable and stable, the 2nd, and software is realized simple, the 3rd, cost is low, and the 4th, do not produce interference signal.
Description of drawings
Fig. 1 is the circuit diagram that the main microphone on cell phone mainboard that provides of the utility model embodiment and ADC switch;
Fig. 2 is the circuit diagram of realizing line traffic control on earphone that the utility model embodiment provides.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
A kind of line control earphone circuit that connects based on four-part form on the mobile phone described in the utility model comprises: mobile phone part and earphone portion, earphone portion partly is electrically connected with mobile phone by earphone interface.
As shown in Figure 1, in the mobile phone part, comprise main microphone input and analog digital conversion (ADC) testing circuit, (in the utility model, the signal end except L channel, R channel and earth signal on the four-part form earphone being called microphone and button detection signal end).Microphone and button detection signal end are connected to the microphone input of mobile phone CPU and the ADC input of CPU.Can adopt following mode to connect, first kind of mode: directly to be connected respectively to microphone input and ADC input (pull-up resistor is arranged on the incoming line, receive analog power).This mode is suitable for the button of negligible amounts.The second way: microphone and button detection signal end signal are divided into two kinds of signal outputs with analog switch U1, be connected respectively to microphone input (1.8V of being higher than bias voltage is arranged on the microphone incoming line) and ADC input (on the ADC incoming line pull-up resistor is arranged, receive analog power).Second kind of connected mode effectively reduces the button current sinking, avoids main microphone different batches equiva lent impedance difference on the mobile phone simultaneously, influences many button identifications, and the selecting side S of analog switch U1 links to each other with mobile phone CPU.
As shown in Figure 2, in earphone portion, comprising: analog switched power supply management circuit, microphone and button buffer circuit, button control logic circuit and analog switch control logic circuit;
Microphone links to each other with the signal input part of analog switch U2 with button detection signal end, through analog switch U2 gating, link to each other with the button control logic circuit with the button buffer circuit with microphone respectively, analog switched power supply management circuit one end links to each other with button detection signal end with microphone, and the other end links to each other with the power end VCC of analog switch U2.
Wherein, the analog switched power supply management circuit is made up of series resistance R0, series diode VD1 and shunt capacitance C1 or backup battery: microphone bias voltage is as the working power of analog switch U2 on the earphone, in order to guarantee analog switch U2 operate as normal, and reducing the audio signal that this power circuit influences microphone output as far as possible, the analog switched power supply management circuit is in parallel with microphone and button detection signal end.
Microphone and button buffer circuit are isolated through analog switch U2, and under the situation that button is not pressed, ear microphone is connected to earphone interface, output sound signal through analog switch U2.When button was pressed, analog switch U2 connected disconnection with ear microphone, and microphone links to each other with the button control logic circuit with button detection signal end.
The button control logic circuit is simulated switch key end one group of resistance R 1 in parallel, R2...Rn from earphone, mechanical switch button KY1, KY2...KYn on each resistance series connection corresponding line, and the mechanical switch button other end is received on the earth signal line.
The analog switch control logic circuit on microphone and the button detection signal end according to the number of button one group of resistance R 10 in parallel, R11...R1n, series diode group VD10, VD11...VD1n on the resistance circuit, the negative pole of diode group are connected to the resistance and the mechanical switch button intersection of respective keys.Draw the control end S of holding wire from the intersection of resistor group and its diode in series group to analog switch.
The utility model operation principle:
In the mobile phone part, when cell-phone function entered play multimedia, at main microphone input and ADC testing circuit, if adopt second kind of connected mode, then the ADC on the analog switch U1 gating CPU was connected with button detection signal line end with microphone; When cell-phone function entered non-multimedia function, the microphone input on the analog switch U1 gating CPU was connected with button detection signal end with microphone.The control of this analog switch is controlled by CPU.If adopt first kind of connected mode, can be parallel to microphone input signal at resistance of ADC end series connection, directly receive microphone and button then and check on the holding wire.
In earphone portion, when earphone inserts, the analog switched power supply management circuit work on the earphone, the circuit bias voltage gives capacitor C 1 charging by resistance R 0 and diode VD1, for analog switch U2 on the earphone provides working power.
When button was not pressed, the control end of the analog switch U2 on the earphone connected pull-up resistor group R10, the R11..R1N of big resistance on microphone bias voltage, and at this moment, microphone is connected to microphone and button detection signal end on the earphone.
When button was pressed, below 0.5V, microphone and push button signalling end were connected on the button circuit control end of analog switch U2 by diode group VD10, VD11...VD1N clamper, and disconnected ear microphone.
Adopt circuit described in the utility model, realized having only four connecting lines, designing the function, the microphone that possess the left and right acoustic channels playing back music and normally talked about function, can discern a plurality of keypress functions.This realization circuit is effective, and cost is low and can not produce interference signal.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (8)
1. line control earphone circuit that connects based on four-part form on the mobile phone comprises: mobile phone part and earphone portion, and earphone portion partly is connected with mobile phone by earphone interface;
It is characterized in that, described mobile phone partly comprises main microphone input and analog digital conversion ADC testing circuit, and described earphone portion comprises: analog switched power supply management circuit, microphone and button buffer circuit, button control logic circuit and analog switch control logic circuit.
2. the line control earphone circuit that connects based on four-part form on the mobile phone as claimed in claim 1, it is characterized in that microphone and button detection signal end are directly connected to microphone input and the ADC input on the mobile phone CPU on described main microphone input and the ADC testing circuit.
3. the line control earphone circuit that connects based on four-part form on the mobile phone as claimed in claim 1, it is characterized in that microphone and button detection signal end are connected respectively to microphone input and ADC input on the mobile phone CPU through first analog switch on described main microphone input and the ADC testing circuit.
4. as claim 2 or the 3 described line control earphone circuit that connect based on four-part form on the mobile phone, it is characterized in that, described microphone links to each other with the signal input part of second analog switch with button detection signal end, link to each other with the button control logic circuit with the button buffer circuit with microphone respectively through second analog switch, analog switched power supply management circuit one end links to each other with button detection signal end with microphone, and the other end links to each other with the power end of second analog switch.
5. the line control earphone circuit that connects based on four-part form on the mobile phone as claimed in claim 4, it is characterized in that, described button control logic circuit is included in simulation switch key end one group of resistance R 1 in parallel, R2...Rn on the earphone, mechanical switch button KY1, KY2...KYn on each resistance series connection corresponding line, the mechanical switch button other end is received on the earth signal line.
6. the line control earphone circuit that connects based on four-part form on the mobile phone as claimed in claim 5, it is characterized in that, described analog switch control logic circuit is included on microphone and the button detection signal end according to the number of button one group of resistance R 10 in parallel, R11...R1n, series diode group VD10, VD11...VD1n on the resistance circuit, the negative pole of diode group are connected to the resistance and the mechanical switch button intersection of respective keys; Draw the control end of holding wire from the intersection of resistor group and its diode in series group to second analog switch.
7. the line control earphone circuit that connects based on four-part form on the mobile phone as claimed in claim 4 is characterized in that described analog switched power supply management circuit is made up of series resistance R0, series diode VD1 and shunt capacitance C1.
8. the line control earphone circuit that connects based on four-part form on the mobile phone as claimed in claim 4 is characterized in that described analog switched power supply management circuit is made up of series resistance R0, series diode VD1 and backup battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202646843U CN201774654U (en) | 2010-07-16 | 2010-07-16 | Wire headset circuit based on mobile phone four-section connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202646843U CN201774654U (en) | 2010-07-16 | 2010-07-16 | Wire headset circuit based on mobile phone four-section connection |
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| Publication Number | Publication Date |
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| CN201774654U true CN201774654U (en) | 2011-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202646843U Expired - Fee Related CN201774654U (en) | 2010-07-16 | 2010-07-16 | Wire headset circuit based on mobile phone four-section connection |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102196076A (en) * | 2011-05-20 | 2011-09-21 | 惠州Tcl移动通信有限公司 | Earphone drive-by-wire circuit of mobile phone and drive-by-wire method |
| CN103167367A (en) * | 2011-12-19 | 2013-06-19 | 腾讯科技（深圳）有限公司 | Earphone and voice message drive-by-wire method and system |
| US20150289049A1 (en) * | 2013-11-27 | 2015-10-08 | 1More Inc. | Earphone line control device and earphone |
| US9210555B2 (en) | 2013-10-15 | 2015-12-08 | Twisted Pair Solutions, Inc. | Pulsed input push-to-talk wireless adapter systems and methods |
| US9398126B2 (en) | 2012-04-13 | 2016-07-19 | Motorola Solutions, Inc. | Pulsed input push-to-talk systems, methods and apparatus |
| CN106131730A (en) * | 2016-08-11 | 2016-11-16 | 歌尔股份有限公司 | A kind of line control earphone |
| US11490188B2 (en) | 2019-04-30 | 2022-11-01 | Shenzhen Shokz Co., Ltd. | Acoustic output device and components thereof |
| US12010475B2 (en) | 2019-04-30 | 2024-06-11 | Shenzhen Shokz Co., Ltd. | Acoustic output device and components thereof |
-
2010
- 2010-07-16 CN CN2010202646843U patent/CN201774654U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102196076A (en) * | 2011-05-20 | 2011-09-21 | 惠州Tcl移动通信有限公司 | Earphone drive-by-wire circuit of mobile phone and drive-by-wire method |
| CN102196076B (en) * | 2011-05-20 | 2014-07-30 | 惠州Tcl移动通信有限公司 | Earphone drive-by-wire circuit of mobile phone and drive-by-wire method |
| CN103167367A (en) * | 2011-12-19 | 2013-06-19 | 腾讯科技（深圳）有限公司 | Earphone and voice message drive-by-wire method and system |
| CN103167367B (en) * | 2011-12-19 | 2015-10-14 | 腾讯科技（深圳）有限公司 | A kind of earphone, voice message drive-by-wire method and system |
| US9398126B2 (en) | 2012-04-13 | 2016-07-19 | Motorola Solutions, Inc. | Pulsed input push-to-talk systems, methods and apparatus |
| US9210555B2 (en) | 2013-10-15 | 2015-12-08 | Twisted Pair Solutions, Inc. | Pulsed input push-to-talk wireless adapter systems and methods |
| US20150289049A1 (en) * | 2013-11-27 | 2015-10-08 | 1More Inc. | Earphone line control device and earphone |
| US9532129B2 (en) * | 2013-11-27 | 2016-12-27 | 1More Inc. | Earphone line control device and earphone |
| CN106131730A (en) * | 2016-08-11 | 2016-11-16 | 歌尔股份有限公司 | A kind of line control earphone |
| US11490188B2 (en) | 2019-04-30 | 2022-11-01 | Shenzhen Shokz Co., Ltd. | Acoustic output device and components thereof |
| US12010475B2 (en) | 2019-04-30 | 2024-06-11 | Shenzhen Shokz Co., Ltd. | Acoustic output device and components thereof |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110323 Termination date: 20160716 |