WO2017101170A1 - 可切换安卓或者苹果系统的三键耳机控制盒优化电路 - Google Patents

可切换安卓或者苹果系统的三键耳机控制盒优化电路 Download PDF

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Publication number
WO2017101170A1
WO2017101170A1 PCT/CN2016/000358 CN2016000358W WO2017101170A1 WO 2017101170 A1 WO2017101170 A1 WO 2017101170A1 CN 2016000358 W CN2016000358 W CN 2016000358W WO 2017101170 A1 WO2017101170 A1 WO 2017101170A1
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resistor
apple
button
microphone
diode
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PCT/CN2016/000358
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English (en)
French (fr)
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杨少聪
林文泰
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富士高实业有限公司
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Publication of WO2017101170A1 publication Critical patent/WO2017101170A1/zh

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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

Definitions

  • the invention relates to the field of earphone circuits, in particular to a three-key earphone control box optimization circuit capable of switching Android or Apple systems.
  • Wired in-ear or headband headphones with a built-in microphone and three-button control box, there are two different types of circuits for Apple or Android smart devices, including mobile phones and tablets.
  • Headphones or headsets for Apple or Android smart devices usually require three button control boxes with microphones. In most cases, these three buttons are “Volume Up”, “Volume Down” and “Multi-Function Button (MFB)".
  • the “Volume Up” and “Volume Down” buttons are used to increase and decrease the volume of the headphones, while the MFB has a variety of functions, such as music play/pause or answering calls, etc.
  • the built-in microphone will have voice mode two-way communication.
  • Apple has its own standard circuit that every manufacturer must follow, and it is recommended by Apple Developer's documentation.
  • headphones or headsets are designed according to Apple standards and will be certified by an accredited laboratory, the product must pass all of Apple's tests and requirements.
  • This product is approved by Apple for MFi (for iPhone/iPod manufacturing) certification.
  • MFi for iPhone/iPod manufacturing
  • the Apple Control Box has its own protocol to allow the phone to recognize the button on the control box that was pressed.
  • Button recognition is done by Apple IC, which produces a specific audio monotony that is transmitted to the Apple device via the microphone positive, which means that the Apple IC acts as a translation between the button and the Apple device, and the iOS device will talk to the Apple IC to provide the appropriate
  • the response is as follows: 1) The MFB button causes the microphone positive signal pin to be shorted; 2) The Apple IC senses the "volume up” or “volume down” button through the defined resistance grid, each time pressing the two buttons At one time, the recognition memory will detect different impedances on this pin.
  • the impedance of the European after detecting the button, the Apple IC will generate a specific tone to send to the Apple device, then the Apple device will know which button is pressed and provide the appropriate response; 3)
  • the voice communication mode through the MicPWR tube
  • the foot drives the FET, and the Apple IC also turns on the microphone.
  • the Android device is a platform open to all manufacturers.
  • the built-in control box with built-in microphone three buttons also includes the "Volume Up” button, and the volume is reduced.
  • Android's button detection mechanism is completely different from Apple's detection mechanism, and no IC is required between the Android smart device and the three button control box.
  • the basic button detection mechanism of the Android device is as follows: 1) The MFB is the same as the Apple device, and the button causes the microphone positive signal pin to be shorted; pressing the “volume up” and “volume down” buttons will cause the microphone positive signal pin to be different.
  • Bias bias by loading different resistor networks to the microphone positive letter
  • the number of pins is implemented by the resistor network consisting of two resistors R1 (220 ohms) and R2 (390 ohms); 3) Unlike Apple devices, in most cases, the Android phone is directly turned on by the positive signal tube from the microphone. Microphone circuit.
  • the object of the present invention is to solve the problem of providing a three-button earphone control box optimization circuit for switchable Android or Apple system, which can convert the Apple resistance network into a resistance net suitable for Android through the resistance network conversion module, and ensure the earphone and the apple. Or compatibility between Android devices.
  • Switchable Android or Apple system three-button headphone control box optimization circuit including 3.5mm plug, Apple IC, three-button control button, field effect transistor and microphone module, 3.5mm plug, field effect transistor and three-button control button are grounded,
  • the positive end of the 3.5mm plug is connected to one end of the Apple IC and the microphone module, and the other end of the microphone module is connected to one end of the field effect transistor.
  • the Apple IC includes a microphone power terminal and a memory identification terminal, and the microphone power terminal and the field effect.
  • the other end of the transistor is connected.
  • the three-button control button includes a volume up button, a volume down button, and a multi-function button.
  • the volume up button, the volume down button, and one end of the multi-function button are connected to the positive end of the microphone.
  • the other end of the reduction button is connected to the memory identification end through the resistor R1
  • the other end of the volume increase button is connected to the resistor R1 through the resistor R5
  • the resistor R5 is connected in series with the resistor R1 and then connected to the memory identification end.
  • the circuit of the invention further comprises a transfer switch, a resistance network conversion module and a diode D7, the switch comprises a switch input end, an Apple mode switch end and an Android mode switch end, the switch input end is connected with the positive end of the microphone, and the apple mode switch end is connected with the apple.
  • the IC is connected, the Android mode switching end is connected with one end of the diode D7 and the resistance network conversion module, and the other end of the diode D7 is connected with the other end of the field effect transistor to form a diode D7 control path, and the resistance network conversion module is respectively increased in volume.
  • the large button and the volume down button are connected.
  • the diode D7 control path When the switch is switched to the Android mode switch, the diode D7 control path will open the field effect transistor, and the resistor network conversion module is used to generate the appropriate voltage bias level and pass the three button.
  • the control button is transmitted to the positive end of the microphone recognized by the Android device, and when the switch is switched to the Apple mode switch end, the signal is controlled by the Apple IC to control the field effect.
  • the transistor should be turned on, and the voltage bias level generated by the Apple IC is transmitted to the positive terminal of the microphone recognized by the Apple device through the three-button control button, so that both the Android mode and the Apple mode share the same FET and the positive terminal of the microphone.
  • the solution of the invention converts the Apple circuit into an Android compatible circuit, and selects a switch, the user can switch the switch on the control box as needed, and selects the Apple or Android mode.
  • the resistance network conversion module includes a diode D5, a diode D6, a resistor R9, a resistor R10, and a resistor R11.
  • the diode D5 is connected in series with the resistor R10, and the diode D6 is connected in series with the resistor R9 and then connected to the diode D5.
  • the resistor R10 is connected in parallel, and the input ends of the diode D5 and the diode D6 are connected to the Android mode switching end, and the output ends of the resistor R9 are respectively connected with the resistor R1, the resistor R5 and the volume reduction button, and the resistor R10 and the resistor R5 and the volume increase respectively.
  • the button is connected, one end of the resistor R11 is connected to the Android mode switching end, the other end of the resistor R11 is grounded, and the resistor R11 is used to suppress the voltage of the diode D5 and the diode D6, and at the same time, the diode D5 is partially prevented from coming from the field effect transistor and
  • the drain voltage of diode D6, resistor R9, resistor R10, resistor R11, diode D5 and diode D6 are combined to form a switch from Apple mode to Android mode control. Resistance network.
  • the microphone module includes a microphone, a resistor R7, a resistor R4, and a capacitor C3.
  • the microphone includes a power voltage terminal, a microphone output terminal, and a ground terminal.
  • the power voltage terminal is connected to the positive terminal of the microphone, and the resistor R7.
  • the resistor R1 is 6.81 kohms and the resistor R5 is 2.61 kohms.
  • the diode D7 has a resistor R8 connected in series.
  • the changeover switch is an electronic switch or a mechanical switch.
  • a three-button built-in microphone control box combining two different circuit structures, so that the circuit of the present invention supports both Android and Apple devices, ensuring compatibility between the earphone and the Apple or Android device;
  • the circuit is the same as the Apple circuit that meets the requirements of Apple MFi. It can be directly converted to Android mode through the switch and the resistance network conversion module. In Android mode, another control path will turn on the field effect transistor and does not need Additional field effect transistors or additional microphones can be implemented. At this point, the Apple resistor network will be part of the Android resistor network to help generate the proper bias to the positive terminal of the microphone.
  • the electrical components for achieving this purpose are less, and the size of the dual mode control box PCB can be minimized, and therefore, the circuit structure of the present invention is used compared with the conventional signal mode design.
  • the overall housing structure of the three-button headphone control box can be designed to be smaller and not limited by the size of the PCB.
  • FIG. 1 is a schematic diagram of a circuit frame according to an embodiment of the present invention.
  • FIG. 3 is a circuit diagram of an Apple control box in the background art
  • Q1 is a field effect transistor
  • MicPWR is a microphone power supply terminal
  • REM is a memory recognition terminal
  • SW1 is a volume reduction button
  • SW2 is a volume increase button
  • SW0 is a multi-function button
  • TONE is a tone terminal.
  • VSHUNT is the voltage regulation terminal
  • MIC is the microphone input terminal
  • SW3-A is the transfer switch
  • MIC OUT is the microphone output terminal
  • MIC1 is the microphone
  • 3.5mm PLUG is the 3.5mm plug.
  • the three-key earphone control box optimization circuit of the switchable Android or Apple system embodied in the embodiment includes a 3.5mm plug, an Apple IC, and a three-key control.
  • Button, field effect transistor Q1 and microphone module, 3.5mm plug, field effect transistor Q1 and three-button control button are grounded, the positive end of the 3.5mm plug microphone is connected with one end of Apple IC and microphone module respectively, 3.5mm plug includes The left and right channels, the other end of the microphone module is connected to one end of the field effect transistor Q1.
  • the Apple IC includes a microphone power terminal and a memory recognition terminal, and the microphone power terminal is connected to the other end of the field effect transistor Q1.
  • the three-button control button includes a volume up button, a volume down button, and a multi-function button.
  • One end of the volume up button, the volume down button, and the multi-function button are connected to the positive end of the microphone, and the other end of the volume down button is passed.
  • the resistor R1 is connected to the memory identification end, and the other end of the volume increase button is connected to the resistor R1 through the resistor R5, so that the resistor R5 is connected in series with the resistor R1 and then connected to the memory identification end.
  • the resistor R1 is 6.81 k ⁇ .
  • the resistance R5 is 2.61 kohms.
  • the circuit of the embodiment further includes a transfer switch, a resistance network conversion module and a diode D7.
  • the switch includes a switch input end, an Apple mode switch end and an Android mode switch end, the switch input end is connected with the positive end of the microphone, the Apple mode switch end is connected with the Apple IC, the Android mode switch end is connected with the end of the diode D7 and the resistance network.
  • the module is connected, the other end of the diode D7 is connected with the other end of the field effect transistor Q1 to form a diode D7 control path, and the diode also has a resistor R8 connected in series with the resistor R8.
  • the resistance R8 in the figure is 887 k ⁇ , and the resistance network conversion module and the volume respectively Increase the button and the volume down button to connect.
  • the diode D7 control path When the transfer switch is switched to the Android mode switch end, the diode D7 control path will turn on the field effect transistor Q1, and the resistor network conversion module is used to generate the appropriate voltage bias level and transmit it to the Android device identifiable through the three-button control button.
  • Microphone positive side when converting When the switch is switched to the Apple mode switch end, the MOSFET Q1 is controlled by the Apple IC to generate a signal, and the voltage bias level generated by the Apple IC is transmitted to the positive terminal of the microphone identifiable by the Apple device through the three-button control button, so that the Android mode is enabled. Both the Apple mode and the Apple mode share the same FET Q1 and the positive terminal of the microphone.
  • the resistance network conversion module includes a diode D5, a diode D6, a resistor R9, a resistor R10, and a resistor R11.
  • the resistor R10 is 22 ohms
  • the resistor R9 is 220 ohms
  • the resistor R11 is 680 kilo ohms.
  • Diode D5 is connected in series with resistor R10.
  • Diode D6 is connected in series with resistor R9 and then connected in parallel with diode D5 and resistor R10.
  • the input terminals of diode D5 and diode D6 are connected to the Android mode switching terminal.
  • the output terminals of resistor R9 are respectively connected to resistor R1 and resistor.
  • the R5 and the volume down button are connected, and the resistor R10 is connected to the resistor R5 and the volume up button respectively.
  • One end of the resistor R11 is connected to the Android mode switching end, the other end of the resistor R11 is grounded, and the resistor R11 is used to suppress the diode D5 and The voltage of diode D6 prevents the drain voltage from diode D5 and diode D6 from being partially turned on from field effect transistor Q1.
  • the combination of resistor R9, resistor R10, resistor R11, diode D5 and diode D6 is formed for switching from Apple mode to Android. Mode controlled resistor network.
  • the diode D5 and the diode D6 When the switch is switched to the Apple mode switch end, the diode D5 and the diode D6 will be turned off through the positive terminal of the microphone.
  • the Apple circuit When the diode D5 and the diode D6 are turned off, the Apple circuit operates normally in the Apple mode; when the switch is switched to the Android mode switch end
  • the transfer switch When the resistance network conversion module is activated, the transfer switch will disconnect the power of the Apple IC. After the Apple IC is disconnected from the positive terminal of the microphone, the positive terminal of the microphone will turn on the diode D5 and the diode D6, when the diode D5 and the diode D6 are turned on.
  • the entire resistor network conversion module When the voltage of the resistor R11, the diode D5, the diode D6, and the resistor R9, the resistor R10, the resistor R1, and the resistor R5 are combined, when pressed
  • the entire resistor network conversion module When the volume up button or the volume down button is used and the normally designed resistor R9 and resistor R10 are used, the entire resistor network conversion module generates an appropriate bias voltage to the positive terminal of the microphone for the purpose of control of the Android mobile phone.
  • the core of the entire circuit, this conversion network will convert the resistor R1 and resistor R5 that were originally connected to the "REM" of the Apple IC to a part of the Android resistor network.
  • the microphone module includes a microphone, a resistor R7, a resistor R4, and a capacitor C3.
  • the resistor R7 is 17.4 kilo ohms
  • the resistor R4 is 1.2 kilo ohms
  • the capacitor C3 is 1 microfarad
  • the microphone includes a power voltage terminal and a microphone.
  • the output end and the ground end, the power voltage end is connected with the positive end of the microphone
  • the resistor R7 is connected in parallel with the resistor R4, and is respectively connected to the ground end and the microphone output end
  • the capacitor C3 is respectively connected with the resistor R7 and the resistor R4.
  • the Apple IC also includes a microphone input terminal, a voltage regulation terminal, and a tone terminal.
  • the microphone input terminal is connected to the Apple mode switching terminal, and a resistor R6 is connected in series between the microphone input terminal and the Apple mode switching terminal.
  • the resistance R6 in the figure is 49.9 ohms.
  • the mode switching end is further connected with a resistor R2, and a capacitor C1 is connected in series, and the other end of the capacitor C1 is grounded.
  • the resistor R2 is 2 k ⁇
  • the capacitor C1 is 1 microfarad
  • the tone end is connected with the apple mode switching end, and the tone is adjusted.
  • the resistor R3 is 1.2 k ⁇
  • the capacitance C2 is 220 picofarads.
  • the three-button built-in microphone control box combining two different circuit structures enables the circuit of the present invention to support both Android and Apple devices, ensuring compatibility between the earphone and the Apple or Android device; in the Apple mode, the circuit and the requirements are in accordance with Apple.
  • the Apple circuit required by MFi is the same. It is directly converted to Android mode through the transfer switch and the resistance network conversion module. In Android mode, another control path will open the field effect transistor Q1 and no additional field effect is required. Transistor Q1 or an additional microphone can be implemented. At this time, the Apple resistor network will become part of the Android resistor network to help generate the proper bias voltage to the positive terminal of the microphone.
  • the conversion of the resistor network conversion module requires only one resistor.
  • the Apple resistor network helps to minimize the number of components used to implement the dual-mode circuit. Since the Apple resistor network is part of the entire Android resistor network, it is significantly different from the traditional Android resistor network; The structure of the conversion makes the electrical components for achieving this purpose less, and the size of the dual mode control box PCB can be minimized, so that the three-key headphone control made by the circuit structure of the present invention is compared with the conventional signal mode design.
  • the overall housing structure of the box can be designed to be smaller and not limited by the size of the PCB.

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  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
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  • Details Of Audible-Bandwidth Transducers (AREA)
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Abstract

一种可切换安卓或者苹果系统的三键耳机控制盒优化电路，包括3.5mm插头、苹果IC、三键控制按钮、场效应晶体管（Q1）和麦克风模块，电路还包括转换开关、电阻网转换模块和二极管（D7），当转换开关切换至苹果模式切换端时，通过苹果IC产生信号控制场效应晶体管（Q1）打开，同时苹果IC产生的电压偏置电平传送至苹果设备可识别的麦克风正极端，使安卓模式及苹果模式均共用同一个场效应晶体管（Q1）和麦克风正极端。结合两种不同电路结构的三按键内置麦克风控制盒，使电路同时支持安卓和苹果设备；通过电阻网转换模块的转换使电路整体只需要设置一个电阻网，由于苹果电阻网属于整个安卓电阻网的一部分，使实现此目的电器元件更少。

Description

可切换安卓或者苹果系统的三键耳机控制盒优化电路 技术领域
本发明涉及耳机电路领域，具体涉及可切换安卓或者苹果系统的三键耳机控制盒优化电路。
背景技术
有线入耳式或头带式耳机，具有内置麦克风及三个按钮的控制盒，存在两种不同类型的电路，分别适用于苹果或安卓智慧设备，包括移动电话和平板电脑。
苹果或安卓智慧设备的耳机或耳麦，通常需要带麦克风的三个按钮控制盒。在大多数情况下，这三个按钮为“音量增大(Volume Up)”、“音量减小(Volume Down)”和“多功能按钮(MFB)”。“音量增大”和“音量减小”按钮用于提高和降低耳机的音量，而MFB具有多种功能，例如音乐播放/暂停或接听电话等，内置麦克风将有语音模式双向沟通之用途。
苹果公司有其自己的标准电路，每个制造商必须遵从，它是苹果开发者文件所推荐。当耳机或耳麦是根据苹果标准设计，且将由认可的实验室认证，产品必须通过苹果的所有测试和要求。经苹果公司批准后，该产品才能获得MFi(为iPhone/iPod制造)认证。符合了上述这些要求，每个制造商生产的三按钮控制盒MFi均是相同的，只要它们获得MFI认证，就保证了不同品牌或制造商的耳机的相容性。
如图3所示，苹果控制盒有其自己规定的协议，以允许手机识别所按下控制盒上的按钮。按钮识别是由苹果IC完成，它会产生特定的音频单调，通过麦克风正极传送到苹果设备，这意味着苹果IC充当按钮与苹果设备之间的翻译，iOS设备会与苹果IC交谈以提供适当的回应，具体如下：1)MFB按钮造成麦克风正极信号管脚短路；2)苹果IC通过定义的电阻网感应“音量增大”或“音量减小”按钮，每次按下这两个按钮中的一个时，识别记忆体会在这个管脚上检测到不同的阻抗。根据苹果IC应用电路，如果按下“音量增大”按钮，REM会检测到2.61千欧+6.81千欧＝9.42千欧的阻抗；如果“音量减小”按钮按下，REM会检测到6.81千欧的阻抗，在检测到按钮后，苹果IC将产生特定的音调发送到苹果设备，然后苹果设备将知道按下的是哪个按钮并提供适当的回应；3)在语音沟通模式中，通过MicPWR管脚驱动FET，苹果IC还会打开麦克风，详情参见《苹果附件介面规范说明R20版》件第31.3部分按钮检测电路使用。
如图4所示，与苹果不同的是，安卓设备是一个对所有制造商开放的平台，内置麦克风三个按钮的入线控制盒也包括“音量增大(Volume Up)”按钮、“音量减小(Volume Down)”按钮和MFB按钮。然而，安卓的按键检测机制与苹果的检测机制完全不同，安卓智慧设备与三个按钮控制盒之间不需要任何IC。安卓设备的基本按键检测机制如下：1)MFB与苹果设备相同，按键引起麦克风正极信号管脚短路；按下“音量增大”和“音量减小”按钮会导致置麦克风正极信号管脚的不同偏压，偏压通过载入不同的电阻网到麦克风正极信 号管脚来实现的，电阻网包括两个电阻R1(220欧姆)和R2(390欧姆)；3)不同于苹果设备的是，在大多数情况下，安卓手机通过从麦克风正极信号管直接打开麦克风电路。
现有技术中为解决上述问题，直接在同一控制盒内安装两种不同的电路，包括安卓电路及苹果电路，组合形成双模式控制盒，即可达到存在两种不同类型的电路的方案，这种方案也是解决上述问题中最显而易见的方案。然而，这种直接的组合结构导致需要体积较大的电路板，因而需要设计出更大的控制盒。显然，这种控制盒的积体要比单模式设计的控制盒大得多，这种设计不仅会影响整体控制盒的美观性，还不符合商业需求。这种双模式控制盒设想的最明显的实施是：在同一印刷电路板(PCB)上设置两个电路(苹果电路和安卓电路)，使用一个开关来启动任一电路。专利公开号为“CN204616061U”的中国专利是一个明显的实例，简而言之，可通过简单的等式来实现该设想：“双模式控制盒＝安卓电路+苹果电路+隔离开关”。然而，该专利无法解决麦克风控制问题，且它需要在同一块PCB上有安卓和苹果电路。
发明内容
本发明的目的是解决以个缺陷，提供可切换安卓或者苹果系统的三键耳机控制盒优化电路，其可通过电阻网转换模块将苹果电阻网转换为适合安卓使用的电阻网，确保耳机与苹果或安卓设备之间的相容性。
本发明的目的是通过以下方式实现的：
可切换安卓或者苹果系统的三键耳机控制盒优化电路，包括3.5mm插头、苹果IC、三键控制按钮、场效应晶体管和麦克风模块，3.5mm插头、场效应晶体管与三键控制按钮均接地，3.5mm插头的麦克风正极端分别与苹果IC及麦克风模块的一端进行连接，麦克风模块的另一端与场效应晶体管的一端进行连接，苹果IC包括麦克风电源端和内存识别端，麦克风电源端与场效应晶体管的另一端进行连接，三键控制按钮包括音量增大按钮、音量减小按钮和多功能按钮，音量增大按钮、音量减小按钮及多功能按钮的一端均与麦克风正极端进行连接，音量减小按钮的另一端通过电阻R1与内存识别端进行连接，音量增大按钮的另一端通过电阻R5与电阻R1进行连接，使电阻R5与电阻R1串联后再与内存识别端进行连接。
本发明的电路还包括转换开关、电阻网转换模块和二极管D7，转换开关包括开关输入端、苹果模式切换端和安卓模式切换端，开关输入端与麦克风正极端进行连接，苹果模式切换端与苹果IC进行连接，安卓模式切换端与二极管D7的一端及电阻网转换模块进行连接，二极管D7的另一端与场效应晶体管的另一端进行连接，形成二极管D7控制路径，电阻网转换模块分别与音量增大按钮及音量减小按钮进行连接，当转换开关切换至安卓模式切换端时，二极管D7控制路径将打开场效应晶体管，电阻网转换模块用于产生适当的电压偏置电平，并通过三键控制按钮传送至安卓设备可识别的麦克风正极端，当转换开关切换至苹果模式切换端时，通过苹果IC产生信号控制场效 应晶体管打开，同时苹果IC产生的电压偏置电平通过三键控制按钮传送至苹果设备可识别的麦克风正极端，使安卓模式及苹果模式均共用同一个场效应晶体管和麦克风正极端。
本发明的方案将苹果电路转换为安卓相容的电路，选用一个转换开关，用户可按需要来切换控制盒上的开关，选择苹果或安卓模式，当开关切换至苹果模式位置时，电路结构符合苹果的要求，这个设想也可以通过一个简单的等式来表示：“本发明的双模式控制盒＝苹果电路+转换开关+电阻网转换模块”。
永久打开苹果麦克风场效应晶体管的控制路径，使用麦克风正极端电压，通过二极体D7打开苹果麦克风场效应晶体管，从而实施控制路径，通过这样做，场效应晶体管将导通，苹果麦克风被打开作为安卓麦克风，不要求额外的安卓麦克风。
上述说明中，作为优选的方案，所述电阻网转换模块包括二极管D5、二极管D6、电阻R9、电阻R10和电阻R11，二极管D5与电阻R10串联，二极管D6与电阻R9串联后再与二极管D5及电阻R10并联，二极管D5及二极管D6的输入端与安卓模式切换端进行连接，电阻R9的输出端分别与电阻R1、电阻R5及音量减小按钮进行连接，电阻R10分别与电阻R5及音量增大按钮进行连接，电阻R11的一端与安卓模式切换端进行连接，电阻R11的另一端接地，电阻R11用于抑制二极管D5和二极管D6的电压，同时可防止来自场效应晶体管会部分接通二极管D5和二极管D6的漏电压，电阻R9、电阻R10、电阻R11、二极管D5及二极管D6组合形成用于从苹果模式转换到安卓模式控制 的电阻网。
上述说明中，作为优选的方案，所述麦克风模块包括麦克风、电阻R7、电阻R4和电容C3，麦克风包括电源电压端、麦克风输出端和接地端，电源电压端与麦克风正极端进行连接，电阻R7与电阻R4并联后分别连接至接地端和麦克风输出端，电容C3分别与电阻R7及电阻R4进行连接。
上述说明中，作为优选的方案，所述电阻R1为6.81千欧，电阻R5为2.61千欧。
上述说明中，作为优选的方案，所述二极管D7串联有电阻R8。
上述说明中，作为优选的方案，所述转换开关为电子开关或者机械开关。
本发明所产生的有益效果如下：
1)结合两种不同电路结构的三按键内置麦克风控制盒，使本发明的电路同时支持安卓和苹果设备，确保耳机与苹果或安卓设备之间的相容性；
2)在苹果模式下，电路与要求符合苹果MFi要求的苹果电路相同，通过转换开关及电阻网转换模块直接转换至安卓模式，在安卓模式下，另一个控制路径将打开场效应晶体管且不需要额外的场效应晶体管或额外的麦克风即可实现，此时，苹果电阻网将成为安卓电阻网的一部分，帮助向麦克风正极端产生适当的偏压；
3)通过电阻网转换模块的转换使电路整体只需要设置一个电阻网，重复使用苹果电阻网有助于最大限度地减少用于实现双模式电路 的部件数量，由于苹果电阻网属于整个安卓电阻网的一部分，与传统的的安卓电阻网明显不同；
4)由于采用电阻网转换的结构，使实现此目的电器元件更少，双模式控制盒PCB的尺寸可最大限度地减小，因此，与传统的信号模式设计相比，采用本发明的电路结构制作的三键耳机控制盒的整体外壳结构可设计更小巧，不受PCB的尺寸的大小限制。
附图说明
图1为本发明实施例的电路框架示意图；
图2为本发明实施例的电路图；
图3为背景技术中苹果控制盒的电路图；
图4为背景技术中安卓控制盒的电路图；
图1和图2中，Q1为场效应晶体管，MicPWR为麦克风电源端，REM为内存识别端，SW1为音量减小按钮，SW2为音量增大按钮，SW0为多功能按钮，TONE为音调端，VSHUNT为电压调节端，MIC为麦克风输入端，SW3-A为转换开关，MIC OUT为麦克风输出端，MIC1为麦克风，3.5mm PLUG为3.5mm插头。
具体实施方式
下面结合附图与具体实施方式对本发明作进一步详细描述。
本实施例，参照图1和图2，其具体实施的可切换安卓或者苹果系统的三键耳机控制盒优化电路包括3.5mm插头、苹果IC、三键控 制按钮、场效应晶体管Q1和麦克风模块，3.5mm插头、场效应晶体管Q1与三键控制按钮均接地，3.5mm插头的麦克风正极端分别与苹果IC及麦克风模块的一端进行连接，3.5mm插头包括左声道和右声道，麦克风模块的另一端与场效应晶体管Q1的一端进行连接。苹果IC包括麦克风电源端和内存识别端，麦克风电源端与场效应晶体管Q1的另一端进行连接。三键控制按钮包括音量增大按钮、音量减小按钮和多功能按钮，音量增大按钮、音量减小按钮及多功能按钮的一端均与麦克风正极端进行连接，音量减小按钮的另一端通过电阻R1与内存识别端进行连接，音量增大按钮的另一端通过电阻R5与电阻R1进行连接，使电阻R5与电阻R1串联后再与内存识别端进行连接，图中，电阻R1为6.81千欧，电阻R5为2.61千欧。
为使苹果电阻网直接转换为安卓电阻网，用以安卓手机控制的目的，本实施例的电路还包括转换开关、电阻网转换模块和二极管D7。转换开关包括开关输入端、苹果模式切换端和安卓模式切换端，开关输入端与麦克风正极端进行连接，苹果模式切换端与苹果IC进行连接，安卓模式切换端与二极管D7的一端及电阻网转换模块进行连接，二极管D7的另一端与场效应晶体管Q1的另一端进行连接，形成二极管D7控制路径，二极管还D7串联有电阻R8，图中电阻R8为887千欧，电阻网转换模块分别与音量增大按钮及音量减小按钮进行连接。
当转换开关切换至安卓模式切换端时，二极管D7控制路径将打开场效应晶体管Q1，电阻网转换模块用于产生适当的电压偏置电平，并通过三键控制按钮传送至安卓设备可识别的麦克风正极端，当转换 开关切换至苹果模式切换端时，通过苹果IC产生信号控制场效应晶体管Q1打开，同时苹果IC产生的电压偏置电平通过三键控制按钮传送至苹果设备可识别的麦克风正极端，使安卓模式及苹果模式均共用同一个场效应晶体管Q1和麦克风正极端。
如图2所示，电阻网转换模块包括二极管D5、二极管D6、电阻R9、电阻R10和电阻R11，图中电阻R10为22欧姆，电阻R9为220欧姆，电阻R11为680千欧。二极管D5与电阻R10串联，二极管D6与电阻R9串联后再与二极管D5及电阻R10并联，二极管D5及二极管D6的输入端与安卓模式切换端进行连接，电阻R9的输出端分别与电阻R1、电阻R5及音量减小按钮进行连接，电阻R10分别与电阻R5及音量增大按钮进行连接，电阻R11的一端与安卓模式切换端进行连接，电阻R11的另一端接地，电阻R11用于抑制二极管D5和二极管D6的电压，同时可防止来自场效应晶体管Q1会部分接通二极管D5和二极管D6的漏电压，电阻R9、电阻R10、电阻R11、二极管D5及二极管D6组合形成用于从苹果模式转换到安卓模式控制的电阻网。
当转换开关切换至苹果模式切换端时，通过麦克风正极端将关闭二极管D5和二极管D6，当二极管D5和二极管D6关闭时，苹果电路在苹果模式下正常运行；当转换开关切换至安卓模式切换端时，电阻网转换模块将被启动，而转换开关将断开苹果IC的电源，苹果IC与麦克风正极端断开后，麦克风正极端将接通二极管D5和二极管D6，当二极管D5和二极管D6打开时，电阻R11、二极管D5、二极管D6以及电阻R9、电阻R10、电阻R1和电阻R5的电压将合在一起，当按 下音量增大按钮或者音量减小按钮并使用正常设计的电阻R9和电阻R10时，整个电阻网转换模块向麦克风正极端生成一个适当偏压，用以安卓手机控制之目的，这个电阻网转换模块就是整个电路的核心，这种转换网将转换最初连接到苹果IC的“REM”的电阻R1和电阻R5到安卓电阻网的一部分。
如图2所示，麦克风模块包括麦克风、电阻R7、电阻R4和电容C3，图中电阻R7为17.4千欧，电阻R4为1.2千欧，电容C3为1微法，麦克风包括电源电压端、麦克风输出端和接地端，电源电压端与麦克风正极端进行连接，电阻R7与电阻R4并联后分别连接至接地端和麦克风输出端，电容C3分别与电阻R7及电阻R4进行连接。苹果IC还包括麦克风输入端、电压调节端和音调端，麦克风输入端与苹果模式切换端进行连接，麦克风输入端与苹果模式切换端之间串联有电阻R6，图中电阻R6为49.9欧姆，苹果模式切换端另外还连接有电阻R2，并串联有电容C1，电容C1的另一端接地，图中电阻R2为2千欧，电容C1为1微法，音调端与苹果模式切换端进行连接，音调端与苹果模式切换端之间串联有电阻R3和电容C2，图中电阻R3为1.2千欧，容C2为220皮法。
结合两种不同电路结构的三按键内置麦克风控制盒，使本发明的电路同时支持安卓和苹果设备，确保耳机与苹果或安卓设备之间的相容性；在苹果模式下，电路与要求符合苹果MFi要求的苹果电路相同，通过转换开关及电阻网转换模块直接转换至安卓模式，在安卓模式下，另一个控制路径将打开场效应晶体管Q1且不需要额外的场效应 晶体管Q1或额外的麦克风即可实现，此时，苹果电阻网将成为安卓电阻网的一部分，帮助向麦克风正极端产生适当的偏压；通过电阻网转换模块的转换使电路整体只需要设置一个电阻网，重复使用苹果电阻网有助于最大限度地减少用于实现双模式电路的部件数量，由于苹果电阻网属于整个安卓电阻网的一部分，与传统的的安卓电阻网明显不同；由于采用电阻网转换的结构，使实现此目的电器元件更少，双模式控制盒PCB的尺寸可最大限度地减小，因此，与传统的信号模式设计相比，采用本发明的电路结构制作的三键耳机控制盒的整体外壳结构可设计更小巧，不受PCB的尺寸的大小限制。
以上内容是结合具体的优选实施例对本发明所作的进一步详细说明，不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干简单推演或替换，都应视为本发明的保护范围。

Claims (6)

  1. 可切换安卓或者苹果系统的三键耳机控制盒优化电路，包括3.5mm插头、苹果IC、三键控制按钮、场效应晶体管和麦克风模块，3.5mm插头、场效应晶体管与三键控制按钮均接地，3.5mm插头的麦克风正极端分别与苹果IC及麦克风模块的一端进行连接，麦克风模块的另一端与场效应晶体管的一端进行连接，苹果IC包括麦克风电源端和内存识别端，麦克风电源端与场效应晶体管的另一端进行连接，三键控制按钮包括音量增大按钮、音量减小按钮和多功能按钮，音量增大按钮、音量减小按钮及多功能按钮的一端均与麦克风正极端进行连接，音量减小按钮的另一端通过电阻R1与内存识别端进行连接，音量增大按钮的另一端通过电阻R5与电阻R1进行连接，使电阻R5与电阻R1串联后再与内存识别端进行连接，其特征在于：该电路还包括转换开关、电阻网转换模块和二极管D7，转换开关包括开关输入端、苹果模式切换端和安卓模式切换端，开关输入端与麦克风正极端进行连接，苹果模式切换端与苹果IC进行连接，安卓模式切换端与二极管D7的一端及电阻网转换模块进行连接，二极管D7的另一端与场效应晶体管的另一端进行连接，形成二极管D7控制路径，电阻网转换模块分别与音量增大按钮及音量减小按钮进行连接，当转换开关切换至安卓模式切换端时，二极管D7控制路径将打开场效应晶体管，电阻网转换模块用于产生适当的电压偏置电平，并通过三键控制按钮传送至安卓设备可识别的麦克风正极端，当转换开关切换至苹果模式切换端时，通过苹果IC产生信号控制场效应晶体管打开，同时苹果IC产生的电压偏置电平通过三键控制按钮传送至苹果设备可 识别的麦克风正极端，使安卓模式及苹果模式均共用同一个场效应晶体管和麦克风正极端。
  2. 根据权利要求1所述可切换安卓或者苹果系统的三键耳机控制盒优化电路，其特征在于：所述电阻网转换模块包括二极管D5、二极管D6、电阻R9、电阻R10和电阻R11，二极管D5与电阻R10串联，二极管D6与电阻R9串联后再与二极管D5及电阻R10并联，二极管D5及二极管D6的输入端与安卓模式切换端进行连接，电阻R9的输出端分别与电阻R1、电阻R5及音量减小按钮进行连接，电阻R10分别与电阻R5及音量增大按钮进行连接，电阻R11的一端与安卓模式切换端进行连接，电阻R11的另一端接地，电阻R11用于抑制二极管D5和二极管D6的电压，同时可防止来自场效应晶体管会部分接通二极管D5和二极管D6的漏电压，电阻R9、电阻R10、电阻R11、二极管D5及二极管D6组合形成用于从苹果模式转换到安卓模式控制的电阻网。
  3. 根据权利要求1或者2所述可切换安卓或者苹果系统的三键耳机控制盒优化电路，其特征在于：所述麦克风模块包括麦克风、电阻R7、电阻R4和电容C3，麦克风包括电源电压端、麦克风输出端和接地端，电源电压端与麦克风正极端进行连接，电阻R7与电阻R4并联后分别连接至接地端和麦克风输出端，电容C3分别与电阻R7及电阻R4进行连接。
  4. 根据权利要求3所述可切换安卓或者苹果系统的三键耳机控制盒优化电路，其特征在于：所述电阻R1为6.81千欧，电阻R5为 2.61千欧。
  5. 根据权利要求1、2或者4所述可切换安卓或者苹果系统的三键耳机控制盒优化电路，其特征在于：所述二极管D7串联有电阻R8。
  6. 根据权利要求1、2或者4所述可切换安卓或者苹果系统的三键耳机控制盒优化电路，其特征在于：所述转换开关为电子开关或者机械开关。
PCT/CN2016/000358 2015-12-18 2016-07-04 可切换安卓或者苹果系统的三键耳机控制盒优化电路 WO2017101170A1 (zh)

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