CN202634659U - Earphone interface self-adaptive circuit and mobile terminal - Google Patents
Earphone interface self-adaptive circuit and mobile terminal Download PDFInfo
- Publication number
- CN202634659U CN202634659U CN 201220233626 CN201220233626U CN202634659U CN 202634659 U CN202634659 U CN 202634659U CN 201220233626 CN201220233626 CN 201220233626 CN 201220233626 U CN201220233626 U CN 201220233626U CN 202634659 U CN202634659 U CN 202634659U
- Authority
- CN
- China
- Prior art keywords
- earphone
- pin
- module
- impedance
- detection module
- 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.)
- Expired - Lifetime
Links
Images
Landscapes
- Stereophonic Arrangements (AREA)
- Telephone Function (AREA)
- Headphones And Earphones (AREA)
Abstract
The utility model discloses an earphone interface self-adaptive circuit and a mobile terminal. The earphone interface self-adaptive circuit comprises an impedance detection module, a control module and a change-over switch module, wherein the impedance detection module is used for detecting the impedance between the tail end and the near end of an earphone plug when an earphone is inserted in the detection module and the plugging of the earphone plug is detected and informing the control module of a detection result; the control module is used for sending a first control signal to the change-over switch module when the impedance detected by the impedance detection module is greater than a first threshold and sending a second control signal to the change-over switch module when the impedance detected by the impedance detection module is smaller than a second threshold; and the change-over switch module is used for switching to make a third pin of an earphone socket connected with a microphone interface of the mobile terminal and a fourth pin connected with the ground when receiving the first control signal and switching to make the fourth pin of the earphone socket connected with the microphone interface of the mobile terminal and the third pin connected with the ground when receiving the second control signal. The earphone interface self-adaptive circuit and the mobile terminal can be used to realize self-adaptive adjustment on earphones of different standards.
Description
Technical field
The utility model relates to the communication terminal technical field, relates in particular to a kind of earphone interface adaptive circuit and portable terminal.
Background technology
At present, portable terminals such as mobile phone usually use 4 pin 3.5mm stereophones, with reference to figure 1, are the sketch mapes of the plug of existing 4 pin earphones, to end 4 pins, near-end corresponding pin 1, far-end corresponding pin 4 are arranged successively from the near-end of plug.But only defined the mechanical dimension and the electrical characteristic of headset plug in the prior art, but pin function has not been carried out explication.
The standard that has two kind of 4 pin earphone in the prior art: a kind of is open mobile-terminal platform (OMTP) standard; The corresponding successively L channel of the 1st pin to the 4 pins, R channel, microphone (MIC) of its definition plug, (GND), use the representative manufacturer of OMTP standard that apple, HTC etc. are arranged at present; Another kind is the North America working standard, the corresponding successively L channel of the 1st pin to the 4 pins, R channel of its definition plug,, microphone, use the representative manufacturer of North America working standard that Nokia, three magnitudes are arranged.That is to say that these two kinds of standards are consistent in the definition of plug the 1st pin and the 2nd pin, and the 3rd pin and the 4th pin are just in time opposite in the definition on Mike and ground.
Because two kinds of above-mentioned standards are inconsistent to the pin function definition; So just caused the mobile phone of different model need use the earphone of corresponding types; Can cause the sound generating distortion of MIC input if earphone that uses and mobile phone do not match, sounding can be undesired.
In sum, exist in the prior art, therefore be necessary to propose improved technological means to address the above problem because earphone adopts various criterion to cause the not adaptive technical problem of mobile phone and earphone.
The utility model content
The main purpose of the utility model is to provide a kind of earphone interface adaptive circuit and portable terminal, causes the not adaptive problem of mobile phone and earphone with what the solution prior art existed owing to earphone adopts various criterion, wherein:
Earphone interface adaptive circuit according to the utility model embodiment; Comprise that earphone inserts detection module; Also comprise: impedance detection module, control module, diverter switch module, wherein: the impedance detection module, when earphone insertion detection module detects the headset plug insertion; Detect the impedance between headset plug end and the near-end, and notify control module testing result; Control module when the detected impedance of impedance detection module during greater than first threshold, is sent first control signal to the diverter switch module, when the detected impedance of impedance detection module during less than second threshold value, sends second control signal to the diverter switch module; The diverter switch module, when receiving first control signal, the 3rd pin that switches earphone socket is connected with Mike's interface of portable terminal, the 4th pin is connected with ground; When receiving second control signal, the 4th pin that switches earphone socket is connected with Mike's interface of portable terminal, the 3rd pin is connected with ground.
Wherein, first threshold is 500 ohm, and second threshold value is 50 ohm.
Wherein, the diverter switch module is controlled double-point double-throw switch.
Wherein, first pin of earphone socket is connected with the L channel interface of portable terminal, second pin is connected with the R channel interface of portable terminal.
Wherein, earphone inserts the logic level that detection module detects the 5th pin of earphone socket, inserts if logic low then detects headset plug.
Portable terminal according to the utility model embodiment; Comprise the earphone interface adaptive circuit, it comprises that earphone inserts detection module, also comprises: impedance detection module, control module, diverter switch module; Wherein: the impedance detection module; When earphone insertion detection module detects the headset plug insertion, detect the impedance between headset plug end and the near-end, and notify control module testing result; Control module when the detected impedance of impedance detection module during greater than first threshold, is sent first control signal to the diverter switch module, when the detected impedance of impedance detection module during less than second threshold value, sends second control signal to the diverter switch module; The diverter switch module, when receiving first control signal, the 3rd pin that switches earphone socket is connected with Mike's interface of portable terminal, the 4th pin is connected with ground; When receiving second control signal, the 4th pin that switches earphone socket is connected with Mike's interface of portable terminal, the 3rd pin is connected with ground.
Wherein, first threshold is 500 ohm, and second threshold value is 50 ohm.
Wherein, the diverter switch module is controlled double-point double-throw switch.
Wherein, first pin of earphone socket is connected with the L channel interface of portable terminal, second pin is connected with the R channel interface of portable terminal.
Wherein, earphone inserts the logic level that detection module detects the 5th pin of earphone socket, inserts if logic low then detects headset plug.
Technical scheme according to the utility model; Detect the end of the headset plug that inserts and the impedance between the near-end; And be connected accordingly with the terminal audio frequency circuit with the 4th pin according to the 3rd pin of detected numerical value with earphone; Realized the self adaptation adjusting of the earphone of various criterion has effectively been promoted user experience through simple circuit configuration.
Description of drawings
Accompanying drawing described herein is used to provide the further understanding to the utility model, constitutes the application's a part, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:
Fig. 1 is the sketch map of 3.5mm4 pin headset plug;
Fig. 2 is the structured flowchart according to the earphone interface adaptive circuit of an embodiment of the utility model;
Fig. 3 is the structured flowchart according to the earphone interface adaptive circuit of another embodiment of the utility model;
Fig. 4 is the flow chart according to the utility model embodiment.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is done to specify further below in conjunction with accompanying drawing and specific embodiment.
According to the embodiment of the utility model, a kind of earphone interface adaptive circuit is provided.Below referring to figs. 2 and 3 the embodiment that describes the utility model in detail.
Fig. 2 is the structured flowchart according to the earphone interface adaptive circuit of the utility model embodiment, and is as shown in Figure 2, and this earphone interface adaptive circuit comprises: earphone inserts detection module 10, impedance detection module 20, control module 30 and diverter switch module 40.
As shown in Figure 3, whether earphone insertion detection module 10 is used for detecting earphone socket has headset plug to insert.Described earphone socket is 4 common pin earphone sockets, and first pin 1 of earphone socket is connected with the L channel interface of portable terminal, second pin 2 is connected with the R channel interface of portable terminal.Earphone socket inside is except first pin 1 ~ four pin 4 in addition five pin 5 and six pin 6 corresponding with plug.When not having headset plug to insert in the earphone socket, first pin 1 and the 5th pin 5 be inner to be contacted, second pin 2 and the 6th pin 6 inside contact; And after inserting headset plug in the earphone socket, first pin 1 separates with the 5th pin 5 inside, and second pin 2 separates with the 6th pin 6 is also inner.
Earphone inserts the logic level of detection module 10 through the 5th pin 5 of detection earphone socket, thereby has judged whether that headset plug inserts.When not having headset plug to insert, the 5th pin is a logic high, and when inserting headset plug, the 5th pin becomes logic low.After earphone insertion detection module 10 detects the headset plug insertion, notice impedance detection module 20.
In the earphone of existing two kinds of standards, the near-end of the earphone of OMTP standard and end are defined as L channel and ground respectively; And the near-end of North America working standard earphone and end are defined as L channel and microphone respectively.Because the impedance on earphone L channel and ground is about 16 ohm or about 32 ohm, and the impedance of earphone L channel and ear microphone is between 500 ohm to 2000 ohm.Therefore, distinguish the type of earphone through the impedance between detection headset plug near-end and the end according to above-mentioned principle.Afterwards with detected resistance value notice control module 30.
The resistance value that control module 30 receives between impedance detection module 20 detected headset plug near-ends and the end; When said resistance value during greater than presetting first threshold; Send first control signal to diverter switch module 40; When said resistance value during, send second control signal to diverter switch module 40 less than preset second threshold value.Wherein, it is 500 ohm that first threshold is set, and second threshold value is 50 ohm.That is to say, when detected resistance value greater than 500 ohm, judge that current earphone is the earphone of North America working standard, sends first control signal; When detected resistance value less than 50 ohm, judge that current earphone is the earphone of OMTP standard, sends second control signal.
Need to prove that shown in Figure 3 is circuit theory, required some electronic components (for example resistance, electric capacity etc.) of practical application are not shown.
Pass through the foregoing description; Through the end of the headset plug that detect to insert and the impedance between the near-end; And be connected accordingly with the terminal audio frequency circuit with the 4th pin according to the 3rd pin of detected numerical value with earphone; Realized the self adaptation adjusting of the earphone of various criterion has effectively been promoted user experience.
The earphone interface adaptive circuit of the utility model is applicable to mobile phone, panel computer, PDA (Personal Digital Assistant; Personal digital assistant) portable terminal such as; Use the portable terminal of the earphone interface adaptive circuit of this utility model, can adapt to the earphone that adopts OMTP standard and two kinds of type of plug of North America working standard automatically.
Be example and the handling process of describing the utility model through Fig. 4 in detail below with the mobile phone.As shown in Figure 4, this method may further comprise the steps at least:
Step S402, mobile phone power-on, whether begin to detect has 4 pin earphones to insert earphone socket.
Step S404 has detected 4 pin earphones and has inserted earphone socket.
Step S406 detects the impedance between headset plug near-end and the end.
Step S408 judges the size of detected resistance value, if greater than first threshold (500 ohm) execution in step S410 then, if less than second threshold value (50 ohm) execution in step S412 then, if other are worth then process ends.
Step S410 judges that current earphone is the earphone of North America working standard, with the 3rd pin 3 of earphone socket be connected with the microphone interface of mobile phone, the 4th pin 4 of earphone socket is connected the flow process end with ground.
Step S412 judges that current earphone is the earphone of OMTP standard, with the 4th pin 4 of earphone socket be connected with Mike's interface of mobile phone, the 3rd pin 3 of earphone socket is connected the flow process end with ground.
In sum; Technical scheme according to the utility model; Detect the end of the headset plug that inserts and the impedance between the near-end; And be connected accordingly with the terminal audio frequency circuit with the 4th pin according to the 3rd pin of detected numerical value with earphone, realized the self adaptation of the earphone of various criterion is regulated through simple circuit configuration, effectively promoted user experience.
The embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the utility model.
Claims (10)
1. an earphone interface adaptive circuit comprises that earphone inserts detection module, it is characterized in that, also comprises: impedance detection module, control module, diverter switch module, wherein:
The impedance detection module when said earphone insertion detection module detects the headset plug insertion, detects the impedance between headset plug end and the near-end, and notifies said control module with testing result;
Control module; When the detected impedance of said impedance detection module during greater than first threshold; Send first control signal to said diverter switch module,, send second control signal to said diverter switch module when the detected impedance of said impedance detection module during less than second threshold value;
The diverter switch module, when receiving first control signal, the 3rd pin that switches said earphone socket is connected with Mike's interface of said portable terminal, the 4th pin is connected with ground; When receiving second control signal, the 4th pin that switches said earphone socket is connected with Mike's interface of said portable terminal, the 3rd pin is connected with ground.
2. circuit according to claim 1 is characterized in that, said first threshold is 500 ohm, and said second threshold value is 50 ohm.
3. circuit according to claim 1 is characterized in that, said diverter switch module is controlled double-point double-throw switch.
4. circuit according to claim 1 is characterized in that, first pin of said earphone socket is connected with the L channel interface of said portable terminal, second pin is connected with the R channel interface of said portable terminal.
5. circuit according to claim 1 is characterized in that, said earphone inserts the logic level that detection module detects the 5th pin of said earphone socket, inserts if logic low then detects headset plug.
6. a portable terminal comprises the earphone interface adaptive circuit, and it comprises that earphone inserts detection module, is characterized in that said earphone interface adaptive circuit also comprises: impedance detection module, control module, diverter switch module, wherein:
The impedance detection module when said earphone insertion detection module detects the headset plug insertion, detects the impedance between headset plug end and the near-end, and notifies said control module with testing result;
Control module; When the detected impedance of said impedance detection module during greater than first threshold; Send first control signal to said diverter switch module,, send second control signal to said diverter switch module when the detected impedance of said impedance detection module during less than second threshold value;
The diverter switch module, when receiving first control signal, the 3rd pin that switches said earphone socket is connected with Mike's interface of said portable terminal, the 4th pin is connected with ground; When receiving second control signal, the 4th pin that switches said earphone socket is connected with Mike's interface of said portable terminal, the 3rd pin is connected with ground.
7. portable terminal according to claim 6 is characterized in that, said first threshold is 500 ohm, and said second threshold value is 50 ohm.
8. portable terminal according to claim 6 is characterized in that, said diverter switch module is controlled double-point double-throw switch.
9. portable terminal according to claim 6 is characterized in that, first pin of said earphone socket is connected with the L channel interface of said portable terminal, second pin is connected with the R channel interface of said portable terminal.
10. portable terminal according to claim 6 is characterized in that, said earphone inserts the logic level that detection module detects the 5th pin of said earphone socket, inserts if logic low then detects headset plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220233626 CN202634659U (en) | 2012-05-23 | 2012-05-23 | Earphone interface self-adaptive circuit and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220233626 CN202634659U (en) | 2012-05-23 | 2012-05-23 | Earphone interface self-adaptive circuit and mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202634659U true CN202634659U (en) | 2012-12-26 |
Family
ID=47387795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220233626 Expired - Lifetime CN202634659U (en) | 2012-05-23 | 2012-05-23 | Earphone interface self-adaptive circuit and mobile terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202634659U (en) |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414981A (en) * | 2013-07-17 | 2013-11-27 | 天地融科技股份有限公司 | Device, method and terminal for recognizing audio interface pins |
| CN103647863A (en) * | 2013-12-27 | 2014-03-19 | 上海斐讯数据通信技术有限公司 | Two mobile terminals-based method and system for mutually testing headset loop |
| CN103905955A (en) * | 2012-12-27 | 2014-07-02 | 华为终端有限公司 | Method and apparatus for detecting insertion of earphones, and interface circuit |
| WO2015117357A1 (en) * | 2014-07-29 | 2015-08-13 | 中兴通讯股份有限公司 | Mobile terminal |
| CN104936055A (en) * | 2015-04-30 | 2015-09-23 | 上海锐鸿通信技术有限公司 | Terminal with earphone interface and earphone interface adaptive method |
| CN105049978A (en) * | 2015-07-31 | 2015-11-11 | 惠州Tcl移动通信有限公司 | Mobile terminal and adapter suitable for different types of earphones |
| CN105210384A (en) * | 2012-12-27 | 2015-12-30 | 思睿逻辑国际半导体有限公司 | Detection circuit |
| CN105554604A (en) * | 2015-12-08 | 2016-05-04 | 潍坊歌尔电子有限公司 | Headset interface conversion device and electronic equipment |
| CN105681995A (en) * | 2014-11-17 | 2016-06-15 | 联芯科技有限公司 | Automatic earphone type identification device and method |
| CN105874818A (en) * | 2013-11-20 | 2016-08-17 | 楼氏电子（北京）有限公司 | Apparatus with a speaker used as second microphone |
| CN106093574A (en) * | 2016-05-30 | 2016-11-09 | 歌尔股份有限公司 | A kind of impedance detection device of headset plug |
| CN106156666A (en) * | 2015-04-20 | 2016-11-23 | 联想(北京)有限公司 | A kind of method controlling electronic equipment and electronic equipment |
| US20160373861A1 (en) * | 2015-06-18 | 2016-12-22 | Blackberry Limited | Passive audio headset compatible with binaural recording and off-headset noise cancellation |
| WO2016206312A1 (en) * | 2015-06-26 | 2016-12-29 | 中兴通讯股份有限公司 | Audio signal transceiving device |
| CN107069341A (en) * | 2016-12-21 | 2017-08-18 | 歌尔股份有限公司 | Headset transfer device based on TypeC |
| CN108009116A (en) * | 2017-12-22 | 2018-05-08 | 努比亚技术有限公司 | MicroUSB interface circuits and its mobile terminal |
| CN108064013A (en) * | 2018-02-23 | 2018-05-22 | 西安闻泰电子科技有限公司 | Earphone detection circuit, earphone detecting method and electronic equipment |
| CN109040424A (en) * | 2018-06-28 | 2018-12-18 | 努比亚技术有限公司 | Antenna switching circuit, method, terminal and computer readable storage medium |
| CN110572732A (en) * | 2019-07-19 | 2019-12-13 | 南昌华勤电子科技有限公司 | earphone standard and impedance measuring device and method |
| CN111122980A (en) * | 2019-12-27 | 2020-05-08 | 陕西烽火电子股份有限公司 | Self-adaptive circuit of earphone interface and application thereof |
-
2012
- 2012-05-23 CN CN 201220233626 patent/CN202634659U/en not_active Expired - Lifetime
Cited By (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103905955A (en) * | 2012-12-27 | 2014-07-02 | 华为终端有限公司 | Method and apparatus for detecting insertion of earphones, and interface circuit |
| CN105210384B (en) * | 2012-12-27 | 2018-06-12 | 思睿逻辑国际半导体有限公司 | Detection circuit |
| CN103905955B (en) * | 2012-12-27 | 2017-11-17 | 华为终端有限公司 | The method of test earphone insertion, the device and interface circuit of test earphone insertion |
| CN105210384A (en) * | 2012-12-27 | 2015-12-30 | 思睿逻辑国际半导体有限公司 | Detection circuit |
| CN103414981A (en) * | 2013-07-17 | 2013-11-27 | 天地融科技股份有限公司 | Device, method and terminal for recognizing audio interface pins |
| CN105874818A (en) * | 2013-11-20 | 2016-08-17 | 楼氏电子（北京）有限公司 | Apparatus with a speaker used as second microphone |
| CN103647863A (en) * | 2013-12-27 | 2014-03-19 | 上海斐讯数据通信技术有限公司 | Two mobile terminals-based method and system for mutually testing headset loop |
| CN103647863B (en) * | 2013-12-27 | 2017-10-24 | 上海斐讯数据通信技术有限公司 | A kind of method and system that earphone loop is mutually measured based on two mobile terminals |
| WO2015117357A1 (en) * | 2014-07-29 | 2015-08-13 | 中兴通讯股份有限公司 | Mobile terminal |
| CN105681995A (en) * | 2014-11-17 | 2016-06-15 | 联芯科技有限公司 | Automatic earphone type identification device and method |
| CN106156666A (en) * | 2015-04-20 | 2016-11-23 | 联想(北京)有限公司 | A kind of method controlling electronic equipment and electronic equipment |
| CN104936055A (en) * | 2015-04-30 | 2015-09-23 | 上海锐鸿通信技术有限公司 | Terminal with earphone interface and earphone interface adaptive method |
| US20160373861A1 (en) * | 2015-06-18 | 2016-12-22 | Blackberry Limited | Passive audio headset compatible with binaural recording and off-headset noise cancellation |
| WO2016206312A1 (en) * | 2015-06-26 | 2016-12-29 | 中兴通讯股份有限公司 | Audio signal transceiving device |
| CN105049978B (en) * | 2015-07-31 | 2019-08-23 | 惠州Tcl移动通信有限公司 | Mobile terminal and switching device suitable for different type earphone |
| CN105049978A (en) * | 2015-07-31 | 2015-11-11 | 惠州Tcl移动通信有限公司 | Mobile terminal and adapter suitable for different types of earphones |
| CN105554604A (en) * | 2015-12-08 | 2016-05-04 | 潍坊歌尔电子有限公司 | Headset interface conversion device and electronic equipment |
| CN106093574B (en) * | 2016-05-30 | 2018-07-03 | 歌尔股份有限公司 | A kind of impedance detection device of headset plug |
| CN106093574A (en) * | 2016-05-30 | 2016-11-09 | 歌尔股份有限公司 | A kind of impedance detection device of headset plug |
| WO2017206482A1 (en) * | 2016-05-30 | 2017-12-07 | 歌尔股份有限公司 | Impedance detection apparatus for headset plug |
| US10823773B2 (en) * | 2016-05-30 | 2020-11-03 | Goertek Inc. | Impedance detection apparatus for earphone plug |
| CN107069341B (en) * | 2016-12-21 | 2023-08-25 | 歌尔股份有限公司 | Earphone switching device based on TypeC |
| CN107069341A (en) * | 2016-12-21 | 2017-08-18 | 歌尔股份有限公司 | Headset transfer device based on TypeC |
| CN108009116B (en) * | 2017-12-22 | 2021-01-05 | 努比亚技术有限公司 | MicroUSB interface circuit and mobile terminal thereof |
| CN108009116A (en) * | 2017-12-22 | 2018-05-08 | 努比亚技术有限公司 | MicroUSB interface circuits and its mobile terminal |
| CN108064013A (en) * | 2018-02-23 | 2018-05-22 | 西安闻泰电子科技有限公司 | Earphone detection circuit, earphone detecting method and electronic equipment |
| CN109040424A (en) * | 2018-06-28 | 2018-12-18 | 努比亚技术有限公司 | Antenna switching circuit, method, terminal and computer readable storage medium |
| CN109040424B (en) * | 2018-06-28 | 2021-04-30 | 努比亚技术有限公司 | Antenna switching circuit, method, terminal and computer readable storage medium |
| CN110572732A (en) * | 2019-07-19 | 2019-12-13 | 南昌华勤电子科技有限公司 | earphone standard and impedance measuring device and method |
| CN110572732B (en) * | 2019-07-19 | 2021-08-03 | 南昌华勤电子科技有限公司 | Earphone standard and impedance measuring device and method |
| CN111122980A (en) * | 2019-12-27 | 2020-05-08 | 陕西烽火电子股份有限公司 | Self-adaptive circuit of earphone interface and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202634659U (en) | Earphone interface self-adaptive circuit and mobile terminal | |
| CN102761803B (en) | Voice frequency interface self-adaptive device | |
| CN101783986B (en) | Earphone interface circuit and electronic equipment | |
| CN101719610A (en) | Wired earphone compatible method and device | |
| CN102480563B (en) | Control method and device in process of inserting earphone into earphone socket | |
| US20140241535A1 (en) | Apparatus, systems and methods for detecting insertion or removal of an audio accessory from an electronic device | |
| CN102404665A (en) | Earphone interface self-adaptation circuit | |
| CN103974163B (en) | Earphone compatible method and device and mobile terminal | |
| CN104519444A (en) | Method and apparatus for an integrated headset switch with reduced crosstalk noise | |
| CN101841753A (en) | Drive-by-wire earphone for portable electronic equipment and method for realizing drive-by-wire | |
| CN101431708A (en) | Terminal and method for recognizing headphone type | |
| CN101938546A (en) | Earphone microphone detection method based on mobile phone and mobile phone | |
| CN104683916A (en) | Circuit and method for detecting pins of microphone | |
| CN106465005A (en) | Earphone type identification method, apparatus and terminal device | |
| CN102769810A (en) | Mobile terminal with a calling misoperation preventive function | |
| CN202721789U (en) | Audio interface adaptive device | |
| CN203872341U (en) | Automatic earphone jack microphone line sequence matching circuit for audio frequency communication | |
| CN102395072B (en) | A kind of headset plug and earphone thereof | |
| CN105050001A (en) | Headset compatible circuit and working method thereof | |
| CN103997704B (en) | Audio playing apparatus and Baffle Box of Bluetooth | |
| CN105120390A (en) | Headphone socket, headphone plug and electronic device | |
| CN103167368A (en) | Earphone compatible circuit and compatible earphones | |
| KR20070022442A (en) | Mobile phone had a function of blocking the Pop-Up Noise when an ear phone connected with the mobile phone | |
| CN101945172A (en) | Mobile phone-based earphone recognition calling method and mobile phone | |
| CN105611460A (en) | Headset circuit and intelligent mobile terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121226 |