CN105451135A - Three-key earphone control box optimization circuit capable of switching android or apple system - Google Patents

Three-key earphone control box optimization circuit capable of switching android or apple system Download PDF

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Publication number
CN105451135A
CN105451135A CN201510954006.7A CN201510954006A CN105451135A CN 105451135 A CN105451135 A CN 105451135A CN 201510954006 A CN201510954006 A CN 201510954006A CN 105451135 A CN105451135 A CN 105451135A
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China
Prior art keywords
resistance
apple
android
microphone
diode
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CN201510954006.7A
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CN105451135B (en
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杨少聪
林文泰
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ZHONGMING (DONGGUAN) ELECTRONICS CO Ltd
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ZHONGMING (DONGGUAN) ELECTRONICS CO Ltd
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Priority to CN201510954006.7A priority Critical patent/CN105451135B/en
Publication of CN105451135A publication Critical patent/CN105451135A/en
Priority to PCT/CN2016/000358 priority patent/WO2017101170A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2420/00—Details of connection covered by H04R, not provided for in its groups
    • H04R2420/09—Applications of special connectors, e.g. USB, XLR, in loudspeakers, microphones or headphones

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Push-Button Switches (AREA)
  • Telephonic Communication Services (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

The invention relates to a three-key earphone control box optimization circuit capable of switching an android or apple system in the field of earphone circuits. The three-key earphone control box optimization circuit comprises a 3.5 mm plug, an apple IC, a three-key control button, a field effect transistor and a microphone module and further comprises a conversion switch, a resistance network conversion module and a diode D7; when the conversion switch switches to the switch end in the apple mode, a signal is generated through the apple IC, such that the field effect transistor is controlled to open; and simultaneously, voltage bias level generated by the apple IC is transmitted to the positive end of a microphone, which can be identified by apple equipment, such that both the android and the apple mode share the same field effect transistor and the positive end of the microphone. Through the three-key built-in microphone control box having two different circuit structures, the circuit disclosed by the invention supports android and apple equipment simultaneously; due to conversion of the resistance network conversion module, only one resistance network is necessary to set in the whole circuit; and an apple resistance network belongs to one part of the whole android resistance network, such that few electrical components for realizing the purpose are needed.

Description

The triple bond earphone control box optimized circuit of changeable Android or apple system
Technical field
The present invention relates to head circuit field, be specifically related to the triple bond earphone control box optimized circuit of changeable Android or apple system.
Background technology
Wired In-Ear or ear receiver, has the control box of built-in microphone and three buttons, there are two kinds of dissimilar circuit, is applicable to apple or Android wisdom equipment respectively, comprises mobile phone and panel computer.
The earphone of apple or Android wisdom equipment or headset, need three the button control boxes being with microphone usually.In most of the cases, these three buttons are " volume increases (VolumeUp) ", " volume reduces (VolumeDown) " and " multifunctional button (MFB) "." volume increase " and " volume reduction " button is for improving and reduce the volume of earphone, and MFB has several functions, such as music play/pause or receive calls, and built-in microphone will have the purposes of speech pattern two-way communication.
There is its oneself preferred circuit in Apple, and each manufacturer must defer to, and it is that apple developer file recommended.When earphone or headset are according to apple standard design, and will by accredited laboratory's certification, product must by all tests of apple and requirement.After Apple's approval, it is that iPhone/iPod manufactures that this product could obtain MFi() certification.Met these requirements above-mentioned, the three button control box MFi that each manufacturer produces are all identical, as long as they obtain MFI certification, just ensure that the compatibility of the earphone of different brands or manufacturer.
As shown in Figure 3, apple control box has the agreement of its oneself regulation, with allow handset identity press button on control box.Pushbutton recognition is completed by apple IC; it is dull that it can produce specific audio frequency; apple equipment is sent to by microphone positive pole; this means that apple IC serves as the translation between button and apple equipment; iOS device can talk to provide suitable response with apple IC, specific as follows: 1) MFB button causes the short circuit of microphone positive signal pin; 2) apple IC is by resistance net induction " volume increase " or " volume reduction " button of definition, and when pressing in these two buttons, recognition memory cognition detects different impedances on this pin at every turn.According to apple IC application circuit, if press " volume increase " button, REM can detect the impedance of 2.61 kilo-ohms+6.81 kilo-ohms=9.42 kilo-ohms; If " volume reduction " button is pressed, REM can detect the impedance of 6.81 kilo-ohms, and after button being detected, specific for generation tone is sent to apple equipment by apple IC, then apple equipment by know press be which button and suitable response be provided; 3) in voice communicative mode, drive FET by MicPWR pin, apple IC also can open microphone, and details use see " apple annex interface normalized illustration R20 version " part the 31.3rd part button testing circuit.
As shown in Figure 4, with apple unlike, Android device is a platform open to all manufacturers, and the lambda line control box of built-in microphone three buttons also comprises " volume increases (VolumeUp) " button, " volume reduces (VolumeDown) " button and MFB button.But the button testing mechanism of Android is completely different from the testing mechanism of apple, without any need for IC between Android wisdom equipment and three button control boxes.The basal keystroke testing mechanism of Android device is as follows: 1) MFB is identical with apple equipment, and button causes the short circuit of microphone positive signal pin; Press the different bias voltages that " volume increase " and " volume reduction " button can cause microphone positive signal pin; by being loaded into, different resistance nets realizes to microphone positive signal pin bias voltage, and resistance net comprises two resistance R1(220 ohms) and R2(390 ohm); 3) be different from apple equipment, in most of the cases, Android mobile phone is by directly opening microphone circuit from microphone positive signal pipe.
For solving the problem in prior art, the circuit that directly installation two kinds is different in same control box, comprise Android circuit and apple circuit, be combined to form two-mode field box, can reach the scheme of the dissimilar circuit of existence two kinds, this scheme is also the most apparent scheme in solving the problem.But this direct combining structure causes the circuit board needing volume larger, thus need to design larger control box.Obviously, the control box that the long-pending body of this control box designs than monotype is much bigger, and this design not only can affect the aesthetic property of overall control box, does not also meet business demand.The most significantly enforcement of this two-mode field box imagination is: on same printed circuit board (PCB) (PCB), arrange two circuit (apple circuit and Android circuit), use a switch to start arbitrary circuit.The Chinese patent that patent publication No. is " CN204616061U " is an obvious example, in brief, realizes this imagination by simple equation: " two-mode field box=Android circuit+apple circuit+isolating switch ".But this patent cannot solve microphone control problem, and it needs on same PCB, have Android and apple circuit.
Summary of the invention
The object of the invention is to solve with individual defect, the triple bond earphone control box optimized circuit of changeable Android or apple system is provided, apple resistance net to be converted to by resistance net modular converter the resistance net that applicable Android uses by it, guarantees the compatibility between earphone and apple or Android device.
The object of the invention is to realize in the following manner:
The triple bond earphone control box optimized circuit of changeable Android or apple system, comprise 3.5mm plug, apple IC, triple bond control button, field-effect transistor and microphone module, 3.5mm plug, field-effect transistor and the equal ground connection of triple bond control button, the microphone positive terminal of 3.5mm plug is connected with one end of apple IC and microphone module respectively, the other end of microphone module is connected with one end of field-effect transistor, apple IC comprises microphone power end and internal memory identification end, microphone power end is connected with the other end of field-effect transistor, triple bond control button comprises volume up button, volume down button and multifunctional button, volume up button, one end of volume down button and multifunctional button is all connected with microphone positive terminal, the other end of volume down button is connected with internal memory identification end by resistance R1, the other end of volume up button is connected with resistance R1 by resistance R5, be connected with internal memory identification end again after resistance R5 is connected with resistance R1.
Circuit of the present invention also comprises change over switch, resistance net modular converter and diode D7, change over switch comprises switch input terminal, apple pattern switch terminal and Android pattern switch terminal, switch input terminal is connected with microphone positive terminal, apple pattern switch terminal is connected with apple IC, one end and the resistance net modular converter of Android pattern switch terminal and diode D7 are connected, the other end of diode D7 is connected with the other end of field-effect transistor, form diode D7 controllability path, resistance net modular converter is connected with volume up button and volume down button respectively, when change over switch switches to Android pattern switch terminal, diode D7 controllability path will open field-effect transistor, resistance net modular converter is for generation of suitable voltage offset level, and be sent to the discernible microphone positive terminal of Android device by triple bond control button, when change over switch switches to apple pattern switch terminal, produce signal controlling field-effect transistor by apple IC to open, the voltage offset level that apple IC produces simultaneously is sent to the discernible microphone positive terminal of apple equipment by triple bond control button, Android pattern and apple pattern is made all to share same field-effect transistor and microphone positive terminal.
Apple circuit conversion is the compatible circuit of Android by the solution of the present invention, select a change over switch, user can switch on demand on switching controls box, select apple or Android pattern, when switching over is to apple mode position, circuit structure meets the requirement of apple, and this imagination also can be represented by a simple equation: " two-mode field box of the present invention=apple circuit+change over switch+resistance net modular converter ".
Forever open the controllability path of apple microphone field-effect transistor, use microphone positive terminal voltage, apple microphone field-effect transistor is opened by diode D7, thus enforcement controllability path, by doing like this, field-effect transistor is by conducting, and apple microphone is opened as Android microphone, does not require extra Android microphone.
In above-mentioned explanation, as preferred scheme, described resistance net modular converter comprises diode D5, diode D6, resistance R9, resistance R10 and resistance R11, diode D5 connects with resistance R10, diode D6 is in parallel with diode D5 and resistance R10 again after connecting with resistance R9, the input of diode D5 and diode D6 is connected with Android pattern switch terminal, the output of resistance R9 respectively with resistance R1, resistance R5 and volume down button connect, resistance R10 is connected with resistance R5 and volume up button respectively, one end of resistance R11 is connected with Android pattern switch terminal, the other end ground connection of resistance R11, resistance R11 is used for the voltage of twin zener dioder D5 and diode D6, the drain voltage partly connecting diode D5 and diode D6 from field-effect transistor can be prevented simultaneously, resistance R9, resistance R10, resistance R11, diode D5 and diode D6 is combined to form for from apple patten transformation to the resistance net of Android Schema control.
In above-mentioned explanation, as preferred scheme, described microphone module comprises microphone, resistance R7, resistance R4 and electric capacity C3, microphone comprises power voltage terminal, microphone output and ground, power voltage terminal is connected with microphone positive terminal, be connected to earth terminal and microphone output after resistance R7 is in parallel with resistance R4 respectively, electric capacity C3 is connected with resistance R7 and resistance R4 respectively.
In above-mentioned explanation, as preferred scheme, described resistance R1 is 6.81 kilo-ohms, and resistance R5 is 2.61 kilo-ohms.
In above-mentioned explanation, as preferred scheme, described diode D7 is in series with resistance R8.
In above-mentioned explanation, as preferred scheme, described change over switch is electronic switch or mechanical switch.
The beneficial effect that the present invention produces is as follows:
1) in conjunction with three button built-in microphone control boxes of two kinds of different circuit structures, make circuit of the present invention support Android and apple equipment simultaneously, guarantee the compatibility between earphone and apple or Android device;
2) under apple pattern; circuit and to require to meet the apple circuit that apple MFi requires identical; Android pattern is directly converted to by change over switch and resistance net modular converter; under Android pattern; another controllability path will be opened field-effect transistor and not needed extra field-effect transistor or extra microphone to realize; now, apple resistance net will become a part for Android resistance net, helps to produce suitable bias voltage to microphone positive terminal;
3) circuit integrity is made only to need to arrange a resistance net by the conversion of resistance net modular converter; reuse the number of components that apple resistance net contributes to reducing to greatest extent for realizing double mode circuit; because apple resistance net belongs to a part for whole Android resistance net, obviously different from traditional Android resistance net;
4) owing to adopting the structure of resistance net conversion, make to realize these object electric elements less, the size of two-mode field box PCB can reduce to greatest extent, therefore, compared with designing with traditional signal mode, the monolithic case structure of the triple bond earphone control box adopting circuit structure of the present invention to make can design smaller and more exquisite, and the size not by the size of PCB limits.
Accompanying drawing explanation
Fig. 1 is the circuit frame schematic diagram of the embodiment of the present invention;
Fig. 2 is the circuit diagram of the embodiment of the present invention;
Fig. 3 is the circuit diagram of apple control box in background technology;
Fig. 4 is the circuit diagram of Android control box in background technology;
In Fig. 1 and Fig. 2, Q1 is field-effect transistor, and MicPWR is microphone power end, REM is internal memory identification end, and SW1 is volume down button, and SW2 is volume up button, SW0 is multifunctional button, TONE is tone end, and VSHUNT is voltage-regulation end, and MIC is microphone input termi-nal, SW3-A is change over switch, MICOUT is microphone output, and MIC1 is microphone, and 3.5mmPLUG is 3.5mm plug.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
The present embodiment, see figures.1.and.2, the triple bond earphone control box optimized circuit of its changeable Android specifically implemented or apple system comprises 3.5mm plug, apple IC, triple bond control button, field-effect transistor Q1 and microphone module, 3.5mm plug, field-effect transistor Q1 and the equal ground connection of triple bond control button, the microphone positive terminal of 3.5mm plug is connected with one end of apple IC and microphone module respectively, 3.5mm plug comprises L channel and R channel, and the other end of microphone module is connected with one end of field-effect transistor Q1.Apple IC comprises microphone power end and internal memory identification end, and microphone power end is connected with the other end of field-effect transistor Q1.Triple bond control button comprises volume up button, volume down button and multifunctional button, one end of volume up button, volume down button and multifunctional button is all connected with microphone positive terminal, the other end of volume down button is connected with internal memory identification end by resistance R1, the other end of volume up button is connected with resistance R1 by resistance R5, be connected with internal memory identification end again after resistance R5 is connected with resistance R1, in figure, resistance R1 is 6.81 kilo-ohms, and resistance R5 is 2.61 kilo-ohms.
For making apple resistance net directly be converted to Android resistance net, the object controlled in order to Android mobile phone, the circuit of the present embodiment also comprises change over switch, resistance net modular converter and diode D7.Change over switch comprises switch input terminal, apple pattern switch terminal and Android pattern switch terminal, switch input terminal is connected with microphone positive terminal, apple pattern switch terminal is connected with apple IC, one end and the resistance net modular converter of Android pattern switch terminal and diode D7 are connected, the other end of diode D7 is connected with the other end of field-effect transistor Q1, form diode D7 controllability path, diode also D7 is in series with resistance R8, in figure, resistance R8 is 887 kilo-ohms, resistance net modular converter is connected with volume up button and volume down button respectively.
When change over switch switches to Android pattern switch terminal, diode D7 controllability path will open field-effect transistor Q1, resistance net modular converter is for generation of suitable voltage offset level, and be sent to the discernible microphone positive terminal of Android device by triple bond control button, when change over switch switches to apple pattern switch terminal, produce signal controlling field-effect transistor Q1 by apple IC to open, the voltage offset level that apple IC produces simultaneously is sent to the discernible microphone positive terminal of apple equipment by triple bond control button, Android pattern and apple pattern is made all to share same field-effect transistor Q1 and microphone positive terminal.
As shown in Figure 2, resistance net modular converter comprises diode D5, diode D6, resistance R9, resistance R10 and resistance R11, and in figure, resistance R10 is 22 ohm, and resistance R9 is 220 ohm, and resistance R11 is 680 kilo-ohms.Diode D5 connects with resistance R10, diode D6 is in parallel with diode D5 and resistance R10 again after connecting with resistance R9, the input of diode D5 and diode D6 is connected with Android pattern switch terminal, the output of resistance R9 respectively with resistance R1, resistance R5 and volume down button connect, resistance R10 is connected with resistance R5 and volume up button respectively, one end of resistance R11 is connected with Android pattern switch terminal, the other end ground connection of resistance R11, resistance R11 is used for the voltage of twin zener dioder D5 and diode D6, the drain voltage partly connecting diode D5 and diode D6 from field-effect transistor Q1 can be prevented simultaneously, resistance R9, resistance R10, resistance R11, diode D5 and diode D6 is combined to form for from apple patten transformation to the resistance net of Android Schema control.
When change over switch switches to apple pattern switch terminal, will close diode D5 and diode D6 by microphone positive terminal, when diode D5 and diode D6 closes, apple circuit normally runs under apple pattern, when change over switch switches to Android pattern switch terminal, resistance net modular converter will be activated, and change over switch will disconnect the power supply of apple IC, after apple IC and microphone positive terminal disconnect, microphone positive terminal will connect diode D5 and diode D6, when diode D5 and diode D6 opens, resistance R11, diode D5, diode D6 and resistance R9, resistance R10, the voltage of resistance R1 and resistance R5 will be combined, when pressing volume up button or volume down button and using resistance R9 and the resistance R10 of normal design, whole resistance net modular converter generates a suitable bias voltage to microphone positive terminal, in order to the object of Android mobile phone control, this resistance net modular converter is exactly the core of whole circuit, conversion is connected to the part of the resistance R1 of " REM " of apple IC and resistance R5 to Android resistance net by this transition net at first.
As shown in Figure 2, microphone module comprises microphone, resistance R7, resistance R4 and electric capacity C3, in figure, resistance R7 is 17.4 kilo-ohms, resistance R4 is 1.2 kilo-ohms, electric capacity C3 is 1 microfarad, and microphone comprises power voltage terminal, microphone output and ground, and power voltage terminal is connected with microphone positive terminal, be connected to earth terminal and microphone output after resistance R7 is in parallel with resistance R4 respectively, electric capacity C3 is connected with resistance R7 and resistance R4 respectively.Apple IC also comprises microphone input termi-nal, voltage-regulation end and tone end, microphone input termi-nal is connected with apple pattern switch terminal, resistance R6 is in series with between microphone input termi-nal and apple pattern switch terminal, in figure, resistance R6 is 49.9 ohm, apple pattern switch terminal is also connected with resistance R2 in addition, and be in series with electric capacity C1, the other end ground connection of electric capacity C1, in figure, resistance R2 is 2 kilo-ohms, electric capacity C1 is 1 microfarad, tone end is connected with apple pattern switch terminal, resistance R3 and electric capacity C2 is in series with between tone end and apple pattern switch terminal, in figure, resistance R3 is 1.2 kilo-ohms, holding C2 is 220 pico farads.
In conjunction with three button built-in microphone control boxes of two kinds of different circuit structures, make circuit of the present invention support Android and apple equipment simultaneously, guarantee the compatibility between earphone and apple or Android device; Under apple pattern; circuit and to require to meet the apple circuit that apple MFi requires identical; Android pattern is directly converted to by change over switch and resistance net modular converter; under Android pattern; another controllability path will be opened field-effect transistor Q1 and not needed extra field-effect transistor Q1 or extra microphone to realize; now, apple resistance net will become a part for Android resistance net, helps to produce suitable bias voltage to microphone positive terminal; Circuit integrity is made only to need to arrange a resistance net by the conversion of resistance net modular converter; reuse the number of components that apple resistance net contributes to reducing to greatest extent for realizing double mode circuit; because apple resistance net belongs to a part for whole Android resistance net, obviously different from traditional Android resistance net; Owing to adopting the structure of resistance net conversion, make to realize these object electric elements less, the size of two-mode field box PCB can reduce to greatest extent, therefore, compared with designing with traditional signal mode, the monolithic case structure of the triple bond earphone control box adopting circuit structure of the present invention to make can design smaller and more exquisite, and the size not by the size of PCB limits.
Above content is in conjunction with concrete preferred embodiment further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as protection scope of the present invention.

Claims (6)

1. the triple bond earphone control box optimized circuit of changeable Android or apple system, comprise 3.5mm plug, apple IC, triple bond control button, field-effect transistor and microphone module, 3.5mm plug, field-effect transistor and the equal ground connection of triple bond control button, the microphone positive terminal of 3.5mm plug is connected with one end of apple IC and microphone module respectively, the other end of microphone module is connected with one end of field-effect transistor, apple IC comprises microphone power end and internal memory identification end, microphone power end is connected with the other end of field-effect transistor, triple bond control button comprises volume up button, volume down button and multifunctional button, volume up button, one end of volume down button and multifunctional button is all connected with microphone positive terminal, the other end of volume down button is connected with internal memory identification end by resistance R1, the other end of volume up button is connected with resistance R1 by resistance R5, be connected with internal memory identification end again after resistance R5 is connected with resistance R1, it is characterized in that: this circuit also comprises change over switch, resistance net modular converter and diode D7, change over switch comprises switch input terminal, apple pattern switch terminal and Android pattern switch terminal, switch input terminal is connected with microphone positive terminal, apple pattern switch terminal is connected with apple IC, one end and the resistance net modular converter of Android pattern switch terminal and diode D7 are connected, the other end of diode D7 is connected with the other end of field-effect transistor, form diode D7 controllability path, resistance net modular converter is connected with volume up button and volume down button respectively, when change over switch switches to Android pattern switch terminal, diode D7 controllability path will open field-effect transistor, resistance net modular converter is for generation of suitable voltage offset level, and be sent to the discernible microphone positive terminal of Android device by triple bond control button, when change over switch switches to apple pattern switch terminal, produce signal controlling field-effect transistor by apple IC to open, the voltage offset level that apple IC produces simultaneously is sent to the discernible microphone positive terminal of apple equipment by triple bond control button, Android pattern and apple pattern is made all to share same field-effect transistor and microphone positive terminal.
2. the triple bond earphone control box optimized circuit of changeable Android or apple system according to claim 1, it is characterized in that: described resistance net modular converter comprises diode D5, diode D6, resistance R9, resistance R10 and resistance R11, diode D5 connects with resistance R10, diode D6 is in parallel with diode D5 and resistance R10 again after connecting with resistance R9, the input of diode D5 and diode D6 is connected with Android pattern switch terminal, the output of resistance R9 respectively with resistance R1, resistance R5 and volume down button connect, resistance R10 is connected with resistance R5 and volume up button respectively, one end of resistance R11 is connected with Android pattern switch terminal, the other end ground connection of resistance R11, resistance R11 is used for the voltage of twin zener dioder D5 and diode D6, the drain voltage partly connecting diode D5 and diode D6 from field-effect transistor can be prevented simultaneously, resistance R9, resistance R10, resistance R11, diode D5 and diode D6 is combined to form for from apple patten transformation to the resistance net of Android Schema control.
3. the triple bond earphone control box optimized circuit of changeable Android or apple system according to claims 1 or 2, it is characterized in that: described microphone module comprises microphone, resistance R7, resistance R4 and electric capacity C3, microphone comprises power voltage terminal, microphone output and ground, power voltage terminal is connected with microphone positive terminal, be connected to earth terminal and microphone output after resistance R7 is in parallel with resistance R4 respectively, electric capacity C3 is connected with resistance R7 and resistance R4 respectively.
4. the triple bond earphone control box optimized circuit of changeable Android or apple system according to claim 3, it is characterized in that: described resistance R1 is 6.81 kilo-ohms, resistance R5 is 2.61 kilo-ohms.
5. the triple bond earphone control box optimized circuit of changeable Android or apple system according to claim 1,2 or 4, is characterized in that: described diode D7 is in series with resistance R8.
6. the triple bond earphone control box optimized circuit of changeable Android or apple system according to claim 1,2 or 4, is characterized in that: described change over switch is electronic switch or mechanical switch.
CN201510954006.7A 2015-12-18 2015-12-18 Three key earphone control boxes of changeable Android or apple system optimize circuit Expired - Fee Related CN105451135B (en)

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PCT/CN2016/000358 WO2017101170A1 (en) 2015-12-18 2016-07-04 Three-button earphone control box optimization circuit capable of switching android or apple system

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CN104780484A (en) * 2015-02-10 2015-07-15 深圳市奥星澳科技有限公司 Earphone control circuit, line control equipment and volume adjustment earphone
CN204616061U (en) * 2015-02-28 2015-09-02 哈曼国际工业有限公司 Intelligent mobile equipment earphone control device
CN205305102U (en) * 2015-12-18 2016-06-08 中名(东莞)电子有限公司 Circuit is optimized to changeable ann triple bond headphone structure box tall and erect or apple system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017101170A1 (en) * 2015-12-18 2017-06-22 富士高实业有限公司 Three-button earphone control box optimization circuit capable of switching android or apple system
CN105872905A (en) * 2016-04-29 2016-08-17 刘圣田 Method for improving tone quality of iPhone
CN107343234A (en) * 2016-05-03 2017-11-10 峰范（北京）科技有限公司 Intelligent earphone
CN107343234B (en) * 2016-05-03 2023-04-21 江西斐耳科技有限公司 Intelligent earphone
TWI611702B (en) * 2016-08-22 2018-01-11 美律實業股份有限公司 Adapter apparatus for headset accessory and signal transfer method of headset accessory
CN108495222A (en) * 2018-03-14 2018-09-04 佳禾智能科技股份有限公司 Double compatible line control earphone control circuits and the control method realized based on the circuit
CN108495222B (en) * 2018-03-14 2021-05-04 佳禾智能科技股份有限公司 Dual-compatible line control earphone control circuit and control method based on circuit
CN114446261A (en) * 2020-10-30 2022-05-06 高创(苏州)电子有限公司 Method for controlling display by wire control earphone and related device
CN114446261B (en) * 2020-10-30 2023-12-01 高创(苏州)电子有限公司 Method for controlling display by using earphone by wire and related device

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