CN202503656U - Device used for earphone microphone line sequence changing-over, and mobile terminal thereof - Google Patents
Device used for earphone microphone line sequence changing-over, and mobile terminal thereof Download PDFInfo
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- CN202503656U CN202503656U CN2011205679190U CN201120567919U CN202503656U CN 202503656 U CN202503656 U CN 202503656U CN 2011205679190 U CN2011205679190 U CN 2011205679190U CN 201120567919 U CN201120567919 U CN 201120567919U CN 202503656 U CN202503656 U CN 202503656U
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- line preface
- tie point
- baseband chip
- preface
- circuit
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Abstract
The utility model discloses a device used for earphone microphone line sequence changing-over, and a mobile terminal thereof. The device comprises a baseband chip. The baseband chip comprises a transmission line sequence for transmitting earphone microphone signals and a connection line sequence for connecting earphone plugs. A changing-over switch for changing over earphone microphone line sequence connections is arranged between the transmission line sequence and the connection line sequence. The baseband chip is used to control the changing-over of the changing-over switch between two modes including the LRGM mode and the LRMG mode. According to the utility model, a changing-over switch for changing over the earphone microphone line sequence connections is arranged between the transmission line sequence and the connection line sequence, and the connection mode of the changing-over switch is controlled through the baseband chip, so the compatibility in user earphone utilization is improved, and the user utilization cost is reduced.
Description
Technical field
The utility model relates to switching device shifter and the portable terminal that is used to switch the earphone connection mode, relates in particular to a kind of ear microphone line preface device for switching and portable terminal thereof of being used for.
Background technology
In the portable terminal of prior art, such as all being provided with earphone interface on the portable terminals such as mobile phone, MP3, MP4, especially intelligent machine series is listened to related voice information to make things convenient for the user.
But no matter be the plug of earphone end; Or the socket on the portable terminal; 4 sections on it (i.e. 4 pin pin) but exist L-R-M-G and two kinds of defining modes of L-R-G-M in actual definition, promptly mean not to be that all earphones can both be general on portable terminal or computer.
When the earphone of different mode and portable terminal use together; No matter be to listen to the music with the MP3 pattern, still under the FM pattern, listen to program, earphone all can not normally use; The problem that dystimbria can occur; Mainly show as voice and disappear basically, and overall loudness is very little, if the cellphone subscriber then can't carry out normal talking.
Present headset plug operated by rotary motion comprises L channel end, R channel end, microphone end and dissipating public loop end; Be L, R, M and GND; And be arranged on the circuit that socket on the electronic products such as mobile phone, computer also comprises L, R, M and GND, and can be used for to the earphone output audio, as shown in Figure 1.But L, R, M and GND and L, R, GND and M on the ear plug on socket are provided with order not simultaneously, and earphone can't normally be used, and the situation of dystimbria occurs.The user need reuse supporting earphone, and this has not only increased user's use cost, and has reduced the compatibility of earphone.
This shows that prior art needs further improvement and develops.
The utility model content
The utility model provides a kind of ear microphone line preface device for switching and portable terminal thereof of being used for for solving above-mentioned defective of the prior art; Through switching the mode of earphone socket connecting line preface; Compatibility when using earphone with the raising user reduces customer using cost.
For solving the problems of the technologies described above, the utility model scheme comprises:
A kind of ear microphone line preface device for switching that is used for; It comprises baseband chip; Wherein, Comprise the transmission line preface and the connecting line preface that is used to be connected headset plug that are used to transmit the ear microphone signal on the said baseband chip, be provided with one between said transmission line preface and the said connecting line preface and be used to switch the diverter switch that ear microphone line preface is connected that said baseband chip is controlled the switching of said diverter switch in LRGM and two kinds of patterns of LRMG.
Described device; Wherein, said transmission line preface comprises positive signal line preface and negative signal line preface, is connected with the analog to digital conversion circuit on the said positive signal line preface; Be connected with a biasing circuit on the said analog to digital conversion circuit, said analog to digital conversion circuit, said biasing circuit all are connected with said baseband chip; Said baseband chip is provided with the bus expansion circuit that is used for the control its switch operation, and bus expansion circuit is connected with the diverter switch circuit.
Described device; Wherein, Said diverter switch comprises the positive signal tie point that is arranged on the said positive signal line preface, is arranged on the negative signal tie point on the said negative signal line preface and is arranged on first tie point, second tie point, the 3rd tie point and the 4th tie point on the said connecting line preface; Said positive signal tie point is provided with positive connector, and said negative signal tie point is provided with negative connector, when said positive connector switches between first tie point and second tie point; Said negative connector switches between the 3rd tie point and the 4th tie point, is used to select to connect the order of connection of dissipating public loop line preface and microphone return line preface.
Described device, wherein, said biasing circuit is provided with direct current biasing resistance.
Described device, wherein, said negative signal line preface is connected with earth connection.
A kind of portable terminal, wherein, said portable terminal is provided with as above arbitrary described device.
Described portable terminal, wherein, said portable terminal is a mobile phone.
The utility model provides a kind of ear microphone line preface device for switching and portable terminal thereof of being used for; Owing to be employed in and be provided with one between transmission line preface and the connecting line preface and be used to switch the diverter switch that ear microphone line preface is connected; Through the connected mode of baseband chip control its switch, and then realized the switching of ear microphone connection mode making mobile terminal device can discern the not earphone of collinear preface; And automatic switchover line preface; Ear microphone can under normal condition, be worked all the time, improved the compatibility the when user uses earphone, reduced customer using cost.
Description of drawings
Fig. 1 is the unmatched structural representation of prior art headphone microphone lines preface.
Fig. 2 is the principle schematic of installing in the utility model.
Fig. 3 is the sketch map of L-R-M-G line preface connection line in the utility model.
Fig. 4 is the sketch map of the equivalent operating circuit of Fig. 3.
Fig. 5 is the sketch map of L-R-G-M line preface connection line in the utility model.
Fig. 6 is the sketch map of the equivalent operating circuit of Fig. 5.
Fig. 7 is the flow process simplified schematic diagram of switching device shifter operation in the utility model.
Embodiment
The utility model provides a kind of ear microphone line preface device for switching and portable terminal thereof of being used for; For the purpose, technical scheme and the advantage that make the utility model clearer, clear and definite; Below will combine accompanying drawing and embodiment, to the utility model further explain.
The utility model provides a kind of ear microphone line preface device for switching that is used for; As shown in Figure 2; It comprises baseband chip 201, and said baseband chip 201 can adopt technological means well known in the prior art, perhaps itself and the shared same baseband chip of portable terminal.Said baseband chip 201 is provided with the transmission line preface 202 and the connecting line preface 203 that is used to be connected headset plug that is used to transmit the ear microphone signal; Be provided with one between said transmission line preface 202 and the said connecting line preface 203 and be used to switch the diverter switch 204 that ear microphone line preface is connected; Said diverter switch 204 operations of said baseband chip 201 controls; Switch the annexation of said transmission line preface 202 and said connecting line preface 203 through diverter switch; Thereby realized the purpose of compatible two kinds of headset modes, improved the compatibility the when user uses earphone.
In the preferred embodiment of the utility model, described like Fig. 2, said transmission line preface 202 comprises positive signal line preface 205 and negative signal line preface 206, and said negative signal 206 is connected with an earth connection.Be connected with analog to digital conversion circuit 207 on the said positive signal line preface 205, be connected with a biasing circuit 208 on the said analog to digital conversion circuit 207, said analog to digital conversion circuit 207, said biasing circuit 208 all are connected with said baseband chip 201; Said baseband chip 201 is provided with the bus expansion circuit 209 that is used for control its switch 204 operations, and bus expansion circuit 209 is connected with diverter switch 204 circuits.Wherein said analog to digital conversion circuit 207, said biasing circuit 208 are used to detect voltage and current value in the said device; Said baseband chip 201 is confirmed the connection mode of said diverter switch 204 through magnitude of voltage; Thereby realized automatic switchover line preface, the purpose that ear microphone can under normal condition, be worked all the time, more convenient when making the user use the utility model.
For description the utility model further; In its another preferred embodiment; Said diverter switch 204 comprises the positive signal tie point 210 that is arranged on the said positive signal line preface 205, be arranged on the negative signal tie point 211 on the said negative signal line preface 206 and be arranged on first tie point 212 on the said connecting line preface 203, second tie point 213, the 3rd tie point 214 and the 4th tie point 215; Said positive signal tie point 210 is provided with positive connector 216, and said negative signal tie point 206 is provided with negative connector 217; Said first tie point 212 all is connected with the dissipating public loop line preface 218 of said connecting line preface 203 with said the 4th tie point 215, said second tie point 213 all is connected with the microphone return line preface 219 of said connecting line preface 203 with said the 3rd tie point 214.
Obviously according to concrete needs; The mode that can adopt also that said first tie point 212 all is connected with the microphone return line preface 219 of said connecting line preface 203 with said the 4th tie point 215, said second tie point 213 and said the 3rd tie point 214 is connected with the dissipating public loop line preface 218 of said connecting line preface 203 all; Certainly each tie point can also adapt to adjustment according to concrete needs with the relation that corresponding line preface connects, and gives unnecessary details no longer one by one.
In the above-described embodiments, if said positive connector 216 is in connection status with said first tie point 212, then said negative connector 217 must be connected with said the 3rd tie point 214.When switching such as the line preface; If said positive connector 216 is in connection status with said second tie point 213; Then said negative connector 217 must be connected with said the 4th tie point 215; When said positive connector 216 switches between first tie point 212 and second tie point 213; Said negative connector 217 also switches between the 3rd tie point 215 and the 4th tie point 216, is used to select to connect the order of connection of dissipating public loop line preface and microphone return line preface, thereby realizes the purpose that adaptive earphone cord sequence pattern switches.
Further, said biasing circuit 208 is provided with direct current biasing resistance 220 and has certain bias resistance, and it is more accurate that said baseband chip 201 is switched.
For description the utility model further; With said first tie point 212 all be connected with said the 4th tie point 215 with the dissipating public loop line preface 218 of said connecting line preface 203, said second tie point 213 all is connected with the microphone return line preface 219 of said connecting line preface 203 with said the 3rd tie point 214 is that example describes; And said positive connector 216 is in connection status with said first tie point 212; Said negative connector 217 is in the state that is connected with said the 3rd tie point 214; Initial condition for device is defined as the L-R-M-G pattern with initial condition in this example.
Under the L-R-M-G pattern, earphone is inserted in the said device, its structure is as shown in Figure 3, and is as shown in Figure 4 with the substitutional connection annexation of device.And when the L-R-M-G mode switch is the L-R-G-M pattern, earphone is inserted in the said device, its structure is as shown in Figure 5, and is as shown in Figure 6 with the substitutional connection annexation of device.
For description the utility model operation conditions further; Like Fig. 3, Fig. 4, Fig. 5 and shown in Figure 6; Two voltage threshold VTH (H) and VTH (L) are set in advance, define said device and be FET (Field Effect Transistor: field-effect transistor), as the ADC of baseband chip circuit 207 (Analog-to-Digital Converter: the analog to digital conversion circuit) collect that voltage is higher than VTH (L) but when being lower than VTH (H); The FET of the ear microphone that proof is inserted is operated in saturation condition; Microphone can not normal output signal, so the GPIO circuit 209 of baseband chip (General Purpose Input Output: bus extender) with regard to output low level, control said diverter switch 204 and switch the earphone line mode; Make ear microphone work to magnifying state, promptly ear microphone can operate as normal.Specific to being the L-R-G-M pattern with the L-R-M-G mode switch in the present embodiment, the said positive connector 216 of promptly said baseband chip 201 controls is connected with said second tie point 213, and said negative connector 217 is connected with said the 4th tie point 215.
And the voltage that collects when the ADC of said baseband chip 201 circuit 207 is when being lower than VTH (L); The FET of the ear microphone that proof is inserted is operated in magnifying state; Microphone is in normal operating conditions; GPIO circuit 209 level of baseband chip still remain height, do not control said diverter switch 204 and make change action.Specific to then keeping the L-R-M-G pattern in the present embodiment, promptly keep said positive connector 216 to be connected with said first tie point 212, said negative connector 217 is connected with said the 3rd tie point 214.
And the voltage that collects when the ADC of said baseband chip 201 circuit 207 is when being higher than VTH (H); Proof does not have earphone to insert or earphone is extracted; This moment, the GPIO circuit 209 of said baseband chip was just exported high level; Control said diverter switch 204 and switch to initial condition, returning to the earphone circuit is initial condition.
The flow process of above-mentioned control procedure is as shown in Figure 7, and is obvious, and the user can be an initial condition with the L-R-G-M mode-definition also, and corresponding annexation also defines again, but its idiographic flow is all similar with above-mentioned flow process, gives unnecessary details no longer one by one at this.
Threshold value VTH (L) can confirm through the method for reality test or simulation calculation:
The method of actual test is exactly that L-R-M-G line preface ear microphone and L-R-G-M line preface ear microphone are linked in the circuit shown in Figure 2; Use the voltage of the FET dc point of oscilloscope measurement ear microphone then; As L-R-M-G line preface ear microphone is inserted in the circuit shown in Figure 2, the voltage that records dc point is VLOW.As L-R-G-M line preface ear microphone is inserted in the circuit shown in Figure 2; The voltage that records dc point is VHIGH; The median of getting VLOW and VHIGH then is as threshold value VTH (L), certainly threshold value VTH (H) median that also can get VHIGH and bias voltage value.Method about simulation calculation repeats no more at this.
Can know that through foregoing description the device of the utility model can be applied on various forms of portable terminals or the computer, in the earphone socket that is applied to portable terminals such as mobile phone, MP3, MP4.
Should be understood that; Above-mentioned description to preferred embodiment is comparatively detailed, can not therefore think the restriction to the utility model scope of patent protection, and those of ordinary skill in the art is under the enlightenment of the utility model; Do not breaking away under the scope situation that the utility model claim protected; Can also make various deformation such as replacement, simple combination, these all fall within the protection range of the utility model, and the scope of asking for protection of the utility model should be as the criterion with accompanying claims.
Claims (7)
1. one kind is used for ear microphone line preface device for switching; It comprises baseband chip; It is characterized in that; Comprise the transmission line preface and the connecting line preface that is used to be connected headset plug that are used to transmit the ear microphone signal on the said baseband chip, be provided with one between said transmission line preface and the said connecting line preface and be used to switch the diverter switch that ear microphone line preface is connected that said baseband chip is controlled the switching of said diverter switch in LRGM and two kinds of patterns of LRMG.
2. device according to claim 1; It is characterized in that; Said transmission line preface comprises positive signal line preface and negative signal line preface; Be connected with the analog to digital conversion circuit on the said positive signal line preface, be connected with a biasing circuit on the said analog to digital conversion circuit, said analog to digital conversion circuit, said biasing circuit all are connected with said baseband chip; Said baseband chip is provided with the bus expansion circuit that is used for the control its switch operation, and bus expansion circuit is connected with the diverter switch circuit.
3. device according to claim 2; It is characterized in that; Said diverter switch comprises the positive signal tie point that is arranged on the said positive signal line preface, is arranged on the negative signal tie point on the said negative signal line preface and is arranged on first tie point, second tie point, the 3rd tie point and the 4th tie point on the said connecting line preface; Said positive signal tie point is provided with positive connector; Said negative signal tie point is provided with negative connector; When said positive connector switched between first tie point and second tie point, said negative connector switched between the 3rd tie point and the 4th tie point, was used to select to connect the order of connection of dissipating public loop line preface and microphone return line preface.
4. device according to claim 2 is characterized in that said biasing circuit is provided with direct current biasing resistance.
5. device according to claim 2 is characterized in that, said negative signal line preface is connected with earth connection.
6. a portable terminal is characterized in that, said portable terminal is provided with like the arbitrary described device of claim 1 to 5.
7. portable terminal according to claim 6, its spy is that said portable terminal is a mobile phone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205679190U CN202503656U (en) | 2011-12-30 | 2011-12-30 | Device used for earphone microphone line sequence changing-over, and mobile terminal thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205679190U CN202503656U (en) | 2011-12-30 | 2011-12-30 | Device used for earphone microphone line sequence changing-over, and mobile terminal thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202503656U true CN202503656U (en) | 2012-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205679190U Expired - Fee Related CN202503656U (en) | 2011-12-30 | 2011-12-30 | Device used for earphone microphone line sequence changing-over, and mobile terminal thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202503656U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103391495A (en) * | 2013-07-01 | 2013-11-13 | 上海摩软通讯技术有限公司 | Automatic earphone adaptation circuit and adaptation method thereof |
| CN103793193A (en) * | 2012-10-30 | 2014-05-14 | 联想(北京)有限公司 | Mode switching method for audio interface, audio interface and electronic equipment |
| CN105049998A (en) * | 2015-07-07 | 2015-11-11 | 北京医康世纪科技有限公司 | Audio communication device |
| CN105092921A (en) * | 2015-09-14 | 2015-11-25 | 马国庆 | Data acquisition circuit in matching with handset oscilloscope in functions |
| CN105246002A (en) * | 2015-11-10 | 2016-01-13 | 歌尔声学股份有限公司 | Data transmission circuit for line control earphone, mobile terminal and line control earphone |
| CN105681995A (en) * | 2014-11-17 | 2016-06-15 | 联芯科技有限公司 | Automatic earphone type identification device and method |
| CN107071650A (en) * | 2017-06-26 | 2017-08-18 | 深圳天珑无线科技有限公司 | Earphone detection circuit, method and terminal |
| CN114615591A (en) * | 2022-05-11 | 2022-06-10 | 浙江地芯引力科技有限公司 | Earphone line sequence switching circuit, method, chip, converter and storage medium |
-
2011
- 2011-12-30 CN CN2011205679190U patent/CN202503656U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103793193A (en) * | 2012-10-30 | 2014-05-14 | 联想(北京)有限公司 | Mode switching method for audio interface, audio interface and electronic equipment |
| CN103391495A (en) * | 2013-07-01 | 2013-11-13 | 上海摩软通讯技术有限公司 | Automatic earphone adaptation circuit and adaptation method thereof |
| CN105681995A (en) * | 2014-11-17 | 2016-06-15 | 联芯科技有限公司 | Automatic earphone type identification device and method |
| 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 |
| CN105092921A (en) * | 2015-09-14 | 2015-11-25 | 马国庆 | Data acquisition circuit in matching with handset oscilloscope in functions |
| CN105246002A (en) * | 2015-11-10 | 2016-01-13 | 歌尔声学股份有限公司 | Data transmission circuit for line control earphone, mobile terminal and line control earphone |
| CN105246002B (en) * | 2015-11-10 | 2018-10-12 | 歌尔股份有限公司 | Data transmission circuit, mobile terminal and line control earphone for line control earphone |
| CN107071650A (en) * | 2017-06-26 | 2017-08-18 | 深圳天珑无线科技有限公司 | Earphone detection circuit, method and terminal |
| CN114615591A (en) * | 2022-05-11 | 2022-06-10 | 浙江地芯引力科技有限公司 | Earphone line sequence switching circuit, method, chip, converter and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121024 Termination date: 20131230 |