CN206313976U - Compatible apple and Android system and windows phone system automatic-switching type voicefrequency circuits - Google Patents

Abstract

The utility model discloses a kind of compatible apple and Android system and Windows phone system automatic-switching type voicefrequency circuits, include audio interface, three key control buttons, identification and control function chip U1, microphone circuit module, the three key controls button includes multifunctional button S1, volume up button S2 and volume down button S2, divider resistance R1 is set on S2, divider resistance R2 is set on S3；Because Android machine is using partial pressure control, Macintosh is signal control, when S1, S2 send order, R1, R2 and identification and control function chip U1 receive order simultaneously, R1, R2 provide instruction for partial pressure, identification and control function chip U1 are only controlled Android system type and Windows phone systems type, unrelated with apple system；When apple system is switched to, identification and control function chip U1 can also send signal command, and control apple IC work is not disturbed by R1, R2, therefore realizes that apple or Android/windowsphone systems automatically switch.

Description

Compatible apple and Android system and windows phone system automatic-switching type sounds Frequency circuit

Technical field

The utility model is related to voicefrequency circuit art, refer in particular to a kind of compatible apple and Android system and Windows phone system automatic-switching type voicefrequency circuits.

Background technology

There are two kinds of differences in wired In-Ear or ear receiver, the control box with built-in microphone and three buttons The circuit of type, is respectively suitable for apple or Android intelligent equipment, including mobile phone and panel computer.

Apple or Android, the earphone or headset of windows phone smart machines, it usually needs three with microphone are pressed Button control box.In most cases, these three buttons are " volume increases (Volume Up) ", " volume reduces (Volume ) " and " multifunctional button (MFB) " Down." volume increase " and " volume reduction " button is used to improve and reduce the volume of earphone, And MFB has various functions, for example, music play/pause or receive calls, built-in microphone there will be the two-way ditch of speech pattern Logical purposes.

There is the preferred circuit of their own in Apple Inc., and each manufacturer must be complied with, and it is that apple developer's file is pushed away Recommend.When earphone or headset are designed according to apple standard, and will must be by the institute of apple by accredited laboratory's certification, product There is test and require.After ratifying through Apple Inc., the product could obtain MFi (for iPhone/iPod is manufactured) certification.Meet Above-mentioned these requirements, three button control box MFi of each manufacturer production are identicals, as long as they obtain MFI certifications, just Ensure that the compatibility of the earphone of different brands or manufacturer.

As shown in figure 3, apple control system has the agreement that their own specifies, to allow handset identity to press in control box Button.Pushbutton recognition is completed by apple IC, and it can produce specific audio dull, and apple is sent to by microphone positive pole Equipment, it means that apple IC serves as the translation between button and apple equipment, iOS device can talk suitable to provide with apple IC When response, it is specific as follows：1) MFB buttons cause the short circuit of microphone positive signal pin；2) resistance that apple IC passes through definition Net sensing " volume increase " or " volume reduction " button, when pressing in the two buttons every time, recognition memory is known from experience Different impedances are detected on this pin.According to apple IC application circuits, if pressing " volume increase " button, REM can be examined Measure 2.61 kilo-ohms+6.81 kilo-ohms=9.42 kilo-ohms of impedance；If " volume reduction " button is pressed, REM can detect 6.81 Kilo-ohm impedance, after button is detected, apple IC will produce specific tone to be sent to apple equipment, and then apple equipment will Know which button that presses is and provides appropriate response；3) in voice communicative mode, driven by MicPWR pins FET, apple IC can also open microphone, details referring to《Apple annex interface specification illustrates R20 editions》The part button of part the 31.3rd Detection circuit is used.

As shown in figure 4, from unlike apple, Android or windows phone equipment are one and all manufacturers are opened The platform put, the line traffic control box that enters of three buttons of built-in microphone also includes " volume increases (Volume Up) " button, " volume Reduction (Volume Down) " button and MFB buttons.However, the testing mechanism of the button testing mechanism of Android and apple is completely not Together, any IC is not needed between Android, windows phone smart machines and three button control boxes.Android/windows The basal keystroke testing mechanism of phone equipment is as follows：1) MFB is identical with apple equipment, and button causes microphone positive signal pipe Pin short circuit；Pressing " volume increase " and " volume reduction " button can cause the different biass of microphone positive signal pin, partially What pressure was realized by being loaded into different resistance nets to microphone positive signal pin, resistance net includes two resistance R1 (220 Europe Nurse) and R2 (390 ohm)；3) different from apple equipment, in most cases, Android/windows phone mobile phones lead to Cross from microphone positive signal pipe and directly open microphone circuit.

In the prior art to solve the above problems, two kinds of different circuits, including peace are directly installed in same control box Tall and erect circuit, windows phone and apple circuit, combination form two-mode field box, you can reach in the presence of two kinds of different types Circuit scheme, this scheme is also most obvious scheme in solving the above problems.However, this direct combination knot Structure results in the need for the larger circuit board of volume, so that designing bigger control box.Obviously, the long-pending body of this control box will It is more much bigger than the control box that monotype is designed, it is this to design the aesthetic property that not only influence overall control box, business is not met also Demand.What this two-mode field box was envisioned most significantly implements is：Two circuits are set on same printed circuit board (PCB) (PCB) (apple circuit and Android circuit/windows phone), either circuit is started using a switch.Patent publication No. is The Chinese patent of " CN204616061U " is an obvious example, in brief, can realize this by simple equation and set Think:" two-mode field box=Android circuit/windows phone+ apples circuit+disconnecting switch ".However, the patent cannot be solved Certainly microphone control problem, and it needs have Android/windows phone and apple circuit on same PCB.

Utility model content

In view of this, in view of the existing deficiencies of the prior art, its main purpose is to provide a kind of compatible apple to the utility model Fruit and Android system, windows phone automatic-switching type voicefrequency circuits.

To achieve the above object, the utility model is using following technical scheme：

A kind of compatible apple and Android system, windows phone system automatic-switching type voicefrequency circuits, including it is pluggable The audio interface of 3.5mm audio jacks, apple Lightning plugs and TYPE-C plugs, three key control buttons, identification and Control function chip U1, microphone circuit module, the three key controls button include multifunctional button S1, volume up button S2 and Volume down button S2, multifunctional button S1, volume up button S2, the two ends of volume down button S3 are inserted with audio respectively Interface is connected, and divider resistance R1 is set on volume up button S2, and divider resistance R2 is set on volume down button S3, and, In in identification and control function chip U1, the identification and control function chip U1 connect microphone to the three key controls button connects Circuit module；

Android system/windows phone types are voltage control, when multifunctional button S1, volume up button When S2 and volume down button S2 send order, the apple of divider resistance R1, divider resistance R2, identification and control function chip U1 IC receives order simultaneously, and it is partial pressure only to Android system/windows phone that divider resistance R1, divider resistance R2 provide instruction System is controlled, unrelated with apple system；

Apple system type is signal control, as multifunctional button S1, volume up button S2 and volume down button S2 When sending order, the apple IC reception orders of identification and control function chip U1, apple IC work by divider resistance R1 and does not divide Piezoresistance R2 is disturbed.

As a kind of preferred scheme, on the audio interface there is microphone to recognize end MIC and earth terminal GND, this is more Function button S1, volume up button S2, one end of volume down button S3 are all connected to the earth terminal GND of audio interface, The other end that the other end of multifunctional button S1 is connected to microphone identification end MIC, volume up button S2 passes through divider resistance R1 is connected with microphone identification end MIC, and the other end of volume down button S3 recognizes end MIC by divider resistance R2 with microphone It is connected.

Used as a kind of preferred scheme, the divider resistance R1 is 220 Ω, and the divider resistance R2 is 510 Ω.

As a kind of preferred scheme, the model EN05DP of the identification and control function chip U1, it is integrated with identification Module and control module, the identification and control function chip U1 have 6 pins, respectively pin PB0, pin GND, pin PB1, pin PB2, pin VDD, pin PB3；Wherein, pin PB0 connects and be grounded after an electric capacity C1, and pin GND is directly grounded, draws Pin PB1 is connected on the MICROP ends of microphone circuit module, and end is recognized with microphone after pin PB2 series resistances R4 and electric capacity C3 MIC is connected；Pin VDD is connected on the other end of volume up button S2, and pin PB3 is connected on the another of volume down button S2 End.

Used as a kind of preferred scheme, the electric capacity C1 is 330nF, and resistance R4 is 10K Ω, and electric capacity C3 is 100nF.

Used as a kind of preferred scheme, the microphone module includes resistance R3, resistance R6, electric capacity C4, microphone output end One end of MK1 and earth terminal MICROP, the resistance R3 are connected to the microphone identification end MIC of audio interface, resistance R3's The other end is attached with resistance R6, electric capacity C4, and resistance R6, electric capacity C4 are in parallel to form filter circuit, is then connected to Microphone output end MK1 and earth terminal MICROP.

Used as a kind of preferred scheme, the resistance R3 is 1K Ω, and resistance R6 is 1K Ω, and electric capacity C4 is 104nF.

Used as a kind of preferred scheme, the microphone module parallel resistance R5, resistance R5 is used to adjust microphone output Hold the power consumption of MK1.

Used as a kind of preferred scheme, the resistance R5 is 10-100K Ω.

As a kind of preferred scheme, four layers of circuit, the width of circuit board are laid with the circuit board that the voicefrequency circuit makes It is 4.15mm.

The utility model has clear advantage and beneficial effect compared with prior art, specifically, by above-mentioned technology Scheme understands, the composition of this voicefrequency circuit include audio interface, three key control buttons, identification and control function chip U1, Microphone circuit module, the three key controls button includes multifunctional button S1, volume up button S2 and volume down button S2, Divider resistance R1 is set on volume up button S2, divider resistance R2 is set on volume down button S3；Because Android machine is used Partial pressure is controlled, and Macintosh is signal control, and R1 and R2 is that Android controls divider resistance, when S1, S2 send order, R1, R2 and Identification and control function chip U1 receive order simultaneously, and R1, R2 provide instruction for partial pressure, and identification and control function chip U1 are only right Android system/windows phone systems type control, it is unrelated with apple system；When apple system is switched to, recognizes and control Functional chip U1 processed can also send signal command, and control apple IC work is not disturbed by R1, R2.Therefore, using this voicefrequency circuit Android/windows phone and apple system, and automatically switch apple or Android system, windows phone systems can be read System.

More clearly to illustrate architectural feature of the present utility model and effect, come right with specific embodiment below in conjunction with the accompanying drawings The utility model is described in detail.

Brief description of the drawings

Fig. 1 is the circuit diagram of the embodiment of the utility model.

Fig. 2 is the circuit board top view of the embodiment of the utility model.

Fig. 3 is the circuit diagram of apple control system in background technology.

Fig. 4 is the circuit diagram of Android control system in background technology.

Specific embodiment

Refer to shown in Fig. 1 and Fig. 2, that show the concrete structure of the preferred embodiment of the utility model, Fig. 1 is one Compatible apple and Android system automatic-switching type voicefrequency circuit are planted, the circuit board made using the voicefrequency circuit is shown in Fig. 2.

Wherein, compatible apple of the present utility model and Android system, windows phone system automatic-switching type audio-frequency electrics Road includes audio interface, three key controls of pluggable 3.5mm audio jacks, apple Ligtning plugs and TYPE-C plugs Button, identification and control function chip U1, microphone circuit module, the three key controls button include multifunctional button S1, volume Increasing button S2 and volume down button S2, multifunctional button S1, volume up button S2, the two ends of volume down button S3 It is connected with audio interface respectively, divider resistance R1 is set on volume up button S2, partial pressure is set on volume down button S3 Resistance R2, and, the three key controls button connects are described to recognize and control function chip in identification and control function chip U1 U1 connects microphone circuit module.

The operation principle of this voicefrequency circuit is as follows：

Android system, windows phone types are voltage control, when multifunctional button S1, volume up button When S2 and volume down button S2 send order, the apple of divider resistance R1, divider resistance R2, identification and control function chip U1 IC receives order simultaneously, and it is partial pressure only to Android system, windows phone that divider resistance R1, divider resistance R2 provide instruction System is controlled, unrelated with apple system.

Apple system type is signal control, as multifunctional button S1, volume up button S2 and volume down button S2 When sending order, the apple IC reception orders of identification and control function chip U1, apple IC work by divider resistance R1 and does not divide Piezoresistance R2 is disturbed.Therefore, Android, windows phone and apple system can be read using this voicefrequency circuit, and is cut automatically Change apple or Android system, window sphone systems.

Specifically, there is microphone to recognize end MIC and earth terminal GND, the multifunctional button on the audio interface S1, volume up button S2, one end of volume down button S3 are all connected to the earth terminal GND of audio interface, multi-functional to press The other end that the other end of button S1 is connected to microphone identification end MIC, volume up button S2 passes through divider resistance R1 and Mike Wind identification end MIC is connected, and the other end of volume down button S3 recognizes that end MIC is connected by divider resistance R2 with microphone.This In embodiment, the divider resistance R1 is 220 Ω, and the divider resistance R2 is 510 Ω.

The identification and the model EN05DP of control function chip U1, it is integrated with identification module and control module, should Identification and control function chip U1 have 6 pins, respectively pin PB0, pin GND, pin PB1, pin PB2, pin VDD, pin PB3；Wherein, pin PB0 connects and be grounded after an electric capacity C1, and pin GND is directly grounded, and pin PB1 is connected on Mike The MICROP ends of wind circuit module, are connected after pin PB2 series resistances R4 and electric capacity C3 with microphone identification end MIC；Pin VDD The other end of volume up button S2 is connected on, pin PB3 is connected on the other end of volume down button S2.In the present embodiment, The electric capacity C1 is 330nF, and resistance R4 is 10K Ω, and electric capacity C3 is 100nF.

The microphone module includes resistance R3, resistance R6, electric capacity C4, microphone output end MK1 and earth terminal MICROP, One end of the resistance R3 is connected to the other end and resistance R6, electric capacity of microphone identification the end MIC, resistance R3 of audio interface C4 is attached, and resistance R6, electric capacity C4 are in parallel to form filter circuit, is then connected to microphone output end MK1 and connects Ground terminal MICROP.In the present embodiment, the resistance R3 is 1K Ω, and resistance R6 is 1K Ω, and electric capacity C4 is 104nF.

The microphone module parallel resistance R5, resistance R5 are used to adjust the power consumption of microphone output end MK1.Need It is bright, can not paste resistance R5 in the case where microphone output end MK1 power consumptions determine OK.In the present embodiment, the resistance R5 is 10-100K Ω.

As shown in Fig. 2 being laid with four layers of circuit on the circuit board of voicefrequency circuit making, the width of circuit board is 4.15mm, can install audio interface on width, be used with the grafting for accommodating 3.5mm audio jacks.

Application of the present utility model is as follows.

1st, when apple system is switched to：

By multifunctional button S1：I by one-shot, pause, stop music, connect, hang up the telephone；II is continuous by cutting twice Change to next bent or next photo；III is continuously switched to a upper one bent or upper photo by three times.By the button S2/S3 on both sides (+,-show)：Give great volume or small.

2nd, Android system, windows phone systems：

By multifunctional button S1：I by one-shot, pause, stop music, connect, hang up the telephone；II is continuous by cutting twice Change to next bent or next photo/re-dialing telephone；III is continuous to be switched to a upper one bent or upper photo/random choosing by three times It is bent.By the button S2/S3 (+,-show) on both sides：Give great volume or small/upper one bent or next song.

In sum, design focal point of the present utility model is that the composition of this voicefrequency circuit includes audio interface, three Key control button, identification and control function chip U1, microphone circuit module, the three key controls button include multifunctional button S1, volume up button S2 and volume down button S2, set divider resistance R1, volume down button on volume up button S2 Divider resistance R2 is set on S3；Because Android machine, windows phone types are using partial pressure control, Macintosh is signal control, R1 and R2 is Android, windows phone control divider resistances, when S1, S2 send order, R1, R2 and identification and control work( Can chip U1 receive order simultaneously, R1, R2 provide instruction for partial pressure, identification and control function chip U1 only to Android system, Windows phone types are controlled, unrelated with apple system；When apple system is switched to, recognize and control function chip U1 Also signal command can be sent, control apple IC work is not disturbed by R1, R2.Therefore, using this voicefrequency circuit can read Android, Windows phone and apple system, and automatically switch apple or Android system, windows phone systems.

The above, is only preferred embodiment of the present utility model, and not technical scope of the present utility model is made Any limitation, therefore every any trickle amendment, equivalent change made to above example according to technical spirit of the present utility model Change and modify, still fall within the range of technical solutions of the utility model.

Claims (10)

1. a kind of compatible apple and Android system and Windows phone system automatic-switching type voicefrequency circuits, its feature exist In：Audio interface, three key controls including pluggable 3.5mm audio jacks, apple Lightning plugs and TYPE-C are pressed Button, identification and control function chip U1, microphone circuit module, the three key controls button include that multifunctional button S1, volume increase Big button S2 and volume down button S2, multifunctional button S1, volume up button S2, the two ends point of volume down button S3 It is not connected with audio interface, divider resistance R1 is set on volume up button S2, partial pressure electricity is set on volume down button S3 Resistance R2, and, the three key controls button connects are described to recognize and control function chip U1 in identification and control function chip U1 Connection microphone circuit module；

Android system/windows phone types are voltage control, as multifunctional button S1, volume up button S2 and When volume down button S2 sends order, the apple IC of divider resistance R1, divider resistance R2, identification and control function chip U1 is same When receive order, divider resistance R1, divider resistance R2 be given instruction for partial pressure only to Android system/windows phone systems It is controlled, it is unrelated with apple system；

Apple system type is signal control, when multifunctional button S1, volume up button S2 and volume down button S2 send During order, the apple IC of identification and control function chip U1 receives order, and apple IC work is not by divider resistance R1 and partial pressure electricity Resistance R2 interference.

2. compatible apple according to claim 1 and Android system and windows phone system automatic-switching type sounds Frequency circuit, it is characterised in that：There is microphone to recognize end MIC and earth terminal GND, the multifunctional button on the audio interface S1, volume up button S2, one end of volume down button S3 are all connected to the earth terminal GND of audio interface, multi-functional to press The other end that the other end of button S1 is connected to microphone identification end MIC, volume up button S2 passes through divider resistance R1 and Mike Wind identification end MIC is connected, and the other end of volume down button S3 recognizes that end MIC is connected by divider resistance R2 with microphone.

3. compatible apple according to claim 2 and Android system/windowsphone system automatic-switching type audio-frequency electrics Road, it is characterised in that：The divider resistance R1 is 220 Ω, and the divider resistance R2 is 510 Ω.

4. compatible apple according to claim 2 and Android system and windows phone system automatic-switching type sounds Frequency circuit, it is characterised in that：The identification and the model EN05DP of control function chip U1, it is integrated with identification module and control Molding block, the identification and control function chip U1 have 6 pins, respectively pin PB0, pin GND, pin PB1, pin PB2, pin VDD, pin PB3；Wherein, pin PB0 connects and be grounded after an electric capacity C1, and pin GND is directly grounded, pin PB1 phases The MICROP ends of microphone circuit module are connected to, end MIC phases are recognized with microphone after pin PB2 series resistances R4 and electric capacity C3 Even；Pin VDD is connected on the other end of volume up button S2, and pin PB3 is connected on the other end of volume down button S2.

5. compatible apple according to claim 4 and Android system and windows phone system automatic-switching type sounds Frequency circuit, it is characterised in that：The electric capacity C1 is 330nF, and resistance R4 is 10K Ω, and electric capacity C3 is 100nF.

6. compatible apple according to claim 4 and Android system and windows phone system automatic-switching type sounds Frequency circuit, it is characterised in that：The microphone module includes resistance R3, resistance R6, electric capacity C4, microphone output end MK1 and connects One end of ground terminal MICROP, the resistance R3 be connected to audio interface microphone identification end MIC, the other end of resistance R3 with Resistance R6, electric capacity C4 are attached, and resistance R6, electric capacity C4 are in parallel to form filter circuit, is then connected to microphone defeated Go out to hold MK1 and earth terminal MICROP.

7. compatible apple according to claim 6 and Android system and windows phone system automatic-switching type sounds Frequency circuit, it is characterised in that：The resistance R3 is 1K Ω, and resistance R6 is 1K Ω, and electric capacity C4 is 104nF.

8. compatible apple according to claim 6 and Android system and windows phone system automatic-switching type sounds Frequency circuit, it is characterised in that：The microphone module parallel resistance R5, resistance R5 are used to adjust microphone output end MK1's Power consumption.

9. compatible apple according to claim 8 and Android system and windows phone system automatic-switching type sounds Frequency circuit, it is characterised in that：The resistance R5 is 10-100K Ω.

10. compatible apple as claimed in any of claims 1 to 9 and Android system and windows phone systems System automatic-switching type voicefrequency circuit, it is characterised in that：Four layers of circuit, circuit are laid with the circuit board that the voicefrequency circuit makes The width of plate is 4.15mm.