CN104378715A - Device and method for lowering earphone POP sound - Google Patents
Device and method for lowering earphone POP sound Download PDFInfo
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- CN104378715A CN104378715A CN201410690570.8A CN201410690570A CN104378715A CN 104378715 A CN104378715 A CN 104378715A CN 201410690570 A CN201410690570 A CN 201410690570A CN 104378715 A CN104378715 A CN 104378715A
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Abstract
The invention relates to a device and method for lowering earphone POP sound. The device comprises an earphone power amplifier, a diverter switch, a first circuit, a second circuit and a processor. The common end of the diverter switch is connected with the earphone power amplifier. The first circuit is connected with a preset capacitor in parallel, and the first circuit is connected with an earphone jack. The second circuit is connected with the earphone jack. The processor is used for detecting the impedance of an earphone after the earphone is inserted into the device so that the POP sound produced during earphone inserting and impedance detecting can be lowered through the capacitor connected to the first circuit in parallel, wherein the first circuit is connected with the normally open end of the diverter switch. After impedance detecting is finished, the normally open end of the diverter switch is controlled to be connected with the second circuit. By means of the technical scheme, the POP sound produced during earphone inserting and impedance detecting can be effectively lowered, and the user experience is improved.
Description
Technical field
The disclosure relates to communication technical field, particularly relates to a kind of apparatus and method reducing earphone POP sound.
Background technology
Along with the pursuit that people live to high-quality, the requirement of people to audio quality is also more and more higher.In public places, people use earphone and the terminal such as mobile phone, panel computer with the use of the output to carry out audio frequency usually.But, in the initialized process of earphone, often produce POP sound, affect the experience of user.
POP sound be coder CODEC when starting working, DC level saltus step in earphone sound channel produces.When POP sound usually occurs in earphone insertion, and after earphone insertion, terminal is carried out in the process of impedance detection earphone.
At present, correlation technique carries out impedance detection by selecting bias voltage little as far as possible to earphone, to reduce the POP sound produced in earphone impedance testing process.But, select little bias voltage that earphone impedance may be caused to detect inaccurate, and the POP sound produced when earphone inserts cannot be solved.
Summary of the invention
For overcoming Problems existing in correlation technique, the disclosure provides a kind of apparatus and method reducing earphone POP sound, to reduce the POP sound that earphone inserts and produces in impedance detection process.
According to the first aspect of disclosure embodiment, a kind of device reducing earphone POP sound is provided, comprises: earphone power amplifier, change over switch, the first circuit, second circuit and processor, wherein:
The common port of described change over switch is connected with earphone power amplifier;
Described first circuit is parallel with default electric capacity, and described first circuit is connected with earphone jack;
Described second circuit is connected with earphone jack;
Described processor, for after earphone inserts, carries out impedance detection to earphone, inserts and in impedance detection process, the POP sound that produces is reduced by the described electric capacity of parallel connection on described first circuit that is connected with the Chang Kaiduan of described change over switch to make earphone; After completing impedance detection, the Chang Kaiduan controlling described change over switch is connected with described second circuit.
Optionally, described processor, also for after earphone inserts, suspends the output of audio frequency, and after the Chang Kaiduan controlling described change over switch is connected with described second circuit, recovers the output of described audio frequency.
Optionally, described processor, also for after described earphone is transferred to, the Chang Kaiduan controlling described change over switch is connected with described first circuit.
Optionally, described processor carries out impedance detection to earphone and comprises:
According to voltage divider principle, impedance detection is carried out to earphone.
Optionally, the size of described default electric capacity is C,
C＝1/RT；
Wherein, T is the time of described capacitor charging, and R is the output impedance of earphone power amplifier and the impedance sum of the first circuit.
Optionally, described change over switch is single-pole double-throw switch (SPDT).
According to the second aspect of disclosure embodiment, a kind of method reducing earphone POP sound is provided, comprises:
After earphone inserts, impedance detection is carried out to earphone, to insert to make earphone and in impedance detection process, the POP sound that produces is reduced by the predetermined capacitive of parallel connection on described first circuit that is connected with the Chang Kaiduan of described change over switch, wherein, the common port of described change over switch is connected with earphone power amplifier, and described first circuit is connected with earphone jack;
After completing impedance detection, the Chang Kaiduan controlling described change over switch is connected with second circuit, and described second circuit is connected with earphone jack.
Optionally, described method also comprises:
After earphone inserts, suspend the output of audio frequency, and after the Chang Kaiduan controlling described change over switch is connected with described second circuit, recover the output of described audio frequency.
Optionally, described method also comprises:
After described earphone is transferred to, the Chang Kaiduan controlling described change over switch is connected with described first circuit.
Optionally, describedly impedance detection carried out to earphone comprise:
According to voltage divider principle, impedance detection is carried out to earphone.
Optionally, the size of described default electric capacity is C,
C＝1/RT；
Wherein, T is the time of described capacitor charging, and R is the output impedance of earphone power amplifier and the impedance sum of second circuit.
Optionally, described change over switch is single-pole double-throw switch (SPDT).
The technical scheme that embodiment of the present disclosure provides can comprise following beneficial effect:
The disclosure arranges the first circuit being parallel with predetermined capacitive between earphone power amplifier and earphone jack, thus the POP sound produced in earphone insertion and impedance detection process is reduced by described electric capacity in parallel on the first circuit, thus promotes Consumer's Experience.Meanwhile, the disclosure does not need to select less bias voltage to carry out impedance detection to earphone, ensure that the accuracy that earphone impedance detects.
After disclosure processor can detect completing earphone impedance, the normal moved end controlling change over switch connects second circuit, and then can start audio plays.
Disclosure processor after earphone is extracted, can be connected with the first circuit by the Chang Kaiduan controlling change over switch, so that when there being earphone to insert, the POP sound produced in earphone insertion and impedance detection process can be made to be reduced by electric capacity in parallel on the first circuit.
Should be understood that, it is only exemplary and explanatory that above general description and details hereinafter describe, and can not limit the disclosure.
Accompanying drawing explanation
Accompanying drawing to be herein merged in specification and to form the part of this specification, shows and meets embodiment of the present disclosure, and is used from specification one and explains principle of the present disclosure.
Fig. 1 is a kind of block diagram reducing the device of earphone POP sound according to an exemplary embodiment.
Fig. 2 is a kind of schematic flow sheet reducing the method for earphone POP sound according to an exemplary embodiment.
Fig. 3 is the schematic flow sheet that another kind according to an exemplary embodiment reduces the method for earphone POP sound.
Fig. 4 is a structural representation of a kind of device for reducing earphone POP sound according to an exemplary embodiment.
Embodiment
Here will be described exemplary embodiment in detail, its sample table shows in the accompanying drawings.When description below relates to accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawing represents same or analogous key element.Execution mode described in following exemplary embodiment does not represent all execution modes consistent with the disclosure.On the contrary, they only with as in appended claims describe in detail, the example of apparatus and method that aspects more of the present disclosure are consistent.
Fig. 1 is a kind of block diagram reducing the device of earphone POP sound according to an exemplary embodiment.
As shown in Figure 1, reduce the device 100 of earphone POP sound in terminal, described terminal comprises: mobile phone, panel computer, computer etc.The device 100 of described reduction earphone POP sound comprises: processor 101, earphone power amplifier 102, change over switch 103, first circuit 104, second circuit 105 and earphone jack 106.
Wherein, processor 101 is connected with earphone power amplifier 102, earphone power amplifier 102 is connected with the common port of change over switch 103, and the Chang Kaiduan that processor 101 controls change over switch 103 is connected with the first circuit 104 or second circuit 105, and the first circuit 104 is all connected with earphone jack 106 with second circuit 105.The left and right acoustic channels of the first circuit 104 is parallel with default electric capacity respectively.It should be noted that, for convenience of explanation, Fig. 1 illustrate only the part relevant to disclosure embodiment, also has not shown D/A converter etc., do not repeat them here between processor 101 and earphone power amplifier 102.
Processor 101, for after earphone inserts, carries out impedance detection to earphone, inserts and in impedance detection process, the POP sound that produces is reduced by the described electric capacity of parallel connection on described first circuit 104 that is connected with the Chang Kaiguan of described change over switch 103 to make earphone.
In the present embodiment, when earphone does not insert terminal, the normal moved end of change over switch 103 connects the first circuit 104 and connects, and after earphone inserts, processor 101 pairs of earphones carry out impedance detection.In this process, the POP sound that earphone inserts and produces in earphone impedance testing process flows through the first circuit 104.Left and right acoustic channels due to the first circuit 104 is all provided with default electric capacity, so when the electric current of the electric current produced in earphone impedance testing process and POP sound flows through the electric capacity that the first circuit 104 is preset, this electric capacity charges, and slowly electric discharge after being full of electricity, and then the POP sound avoiding direct current saltus step to produce.
Processor 101 is after completing earphone impedance detection, and the normal moved end controlling change over switch 103 connects second circuit 105, now, can start the broadcasting of audio frequency.
Optionally, in another embodiment of the disclosure, if earphone is when insertion, terminal is just in audio plays, then after detecting that earphone inserts, processor 101 suspends the output of audio frequency, changes thus affects Consumer's Experience during the electric capacity preset on the first circuit 104 to avoid audio frequency.Processor 101 carries out impedance detection to earphone after earphone inserts, and after completing earphone impedance detection, the Chang Kaiduan controlling change over switch 103 is connected with second circuit 105, and recovers the output of audio frequency.
Optionally, in another embodiment of the disclosure, processor 101 is after earphone is transferred to, the Chang Kaiduan controlling change over switch 103 is connected with the first circuit 104, so that when there being earphone to insert, the POP sound produced in earphone insertion and impedance detection process can be made to be reduced by the electric capacity that the first circuit 104 is preset.
Optionally, in another embodiment of the disclosure, processor 101 pairs of earphones carry out impedance detection and can comprise: carry out impedance detection according to voltage divider principle to earphone.In the present embodiment, processor 101 obtains the magnitude of voltage at earphone two ends and the current value by earphone, calculates the magnitude of voltage at earphone two ends and the ratio of the current value by earphone, and using this ratio as earphone impedance.
Suppose, the magnitude of voltage U at the earphone two ends got is 40 volts, is 0.2 peace by the current value I of earphone, then earphone impedance R=U/I=200 ohm.
Optionally, in another embodiment of the disclosure, can be calculated the size of described default electric capacity by the computing formula of capacitor charging time, this computing formula is: C=1/RT.Wherein, T is the time of capacitor charging, and R is the output impedance of earphone power amplifier and the impedance sum of the first circuit.In actual applications, if the time T of capacitor charging selects excessive, earphone impedance will be caused long for detection time, affect Consumer's Experience, if the time T of capacitor charging selects too small, the effect reducing POP sound may be just not ideal enough.In general, described capacitor charging time T can be chosen as 10 seconds.The output impedance of described earphone power amplifier and the impedance sum R of the first circuit generally more than 1 ohm, can not suppose R=1 ohm, then according to above-mentioned formula, electric capacity C=1/ (1 × 10)=100 microfarad, so generally, described default capacitance size can be chosen as 100 microfarads.
Optionally, in another embodiment of the disclosure, described change over switch 103 is single-pole double-throw switch (SPDT).Certainly, those skilled in the art also can use chip as described change over switch 103, and the disclosure does not make particular restriction to this.
Described as can be seen from above, the disclosure arranges the first circuit being parallel with predetermined capacitive between earphone power amplifier and earphone jack, thus the POP sound produced in earphone insertion and impedance detection process is reduced by described electric capacity in parallel on the first circuit, thus promote Consumer's Experience.Meanwhile, the disclosure does not need to select less bias voltage to carry out impedance detection to earphone, ensure that the accuracy that earphone impedance detects.
Below in conjunction with concrete application scenarios, specific implementation of the present disclosure is described.
Suppose, user is using to put outside mobile phone and is listening to the music, now, on mobile phone, the Chang Kaiduan of change over switch is connected on the first circuit, when user want earphone to access mobile phone continue to listen to the music by earphone time, earphone is inserted mobile phone by user, and the processor of mobile phone detects the insertion of earphone, the audio frequency suspending music exports, and carries out impedance detection to this earphone.The POP sound inserting at earphone and produce in impedance detection process is reduced by electric capacity in parallel on the first circuit.After processor completes impedance detection, the Chang Kaiduan controlling change over switch is connected with second circuit, and the audio frequency recovering music exports.After earphone is extracted by user, the Chang Kaiduan that processor controls change over switch is connected with the first circuit.In whole process, for user, after its just earphone insertion mobile phone felt, music has flashy time-out, but can't hear the POP sound of explosion, experiences better.
Wherein, cell phone processor can adopt description in earlier figures 1 shown device embodiment to realize said process, does not repeat them here.
Corresponding with the device embodiment of aforementioned reduction earphone POP sound, the disclosure additionally provides the embodiment of the method reducing earphone POP sound.
Fig. 2 is a kind of schematic flow sheet reducing the method for earphone POP sound according to an exemplary embodiment.
As shown in Figure 2, the method for described reduction earphone POP sound may be used for, in terminal, comprising the following steps:
In step s 201, after earphone inserts, impedance detection is carried out to earphone, to insert to make earphone and in impedance detection process, the POP sound that produces is reduced by the predetermined capacitive of parallel connection on described first circuit that is connected with the Chang Kaiduan of described change over switch, wherein, the common port of described change over switch is connected with earphone power amplifier, and described first circuit is connected with earphone jack.
In step S202, after completing impedance detection, the Chang Kaiduan controlling described change over switch is connected with second circuit, and described second circuit is connected with earphone jack.
Described as can be seen from above, the disclosure arranges the first circuit being parallel with predetermined capacitive between earphone power amplifier and earphone jack, thus the POP sound produced in earphone insertion and impedance detection process is reduced by described electric capacity in parallel on the first circuit, thus promote Consumer's Experience.Meanwhile, the disclosure does not need to select less bias voltage to carry out impedance detection to earphone, ensure that the accuracy that earphone impedance detects.
Optionally, in another embodiment of the disclosure, after earphone inserts, suspend the output of audio frequency, and the product controlling described change over switch open be connected with described second circuit after, recover the output of described audio frequency.
Fig. 3 is a kind of schematic flow sheet reducing the method for earphone POP sound according to another exemplary embodiment, and described method may be used in terminal, and this embodiment is on aforementioned basis embodiment illustrated in fig. 2, and described method can also comprise:
In step S203, after earphone is transferred to, the Chang Kaiduan controlling described change over switch is connected with described first circuit.
In the present embodiment, after earphone is extracted, can being connected with the first circuit by the Chang Kaiduan controlling change over switch, so that when there being earphone to insert, the POP sound produced in earphone insertion and impedance detection process can being made to be reduced by electric capacity in parallel on the first circuit.
Optionally, in another embodiment of the disclosure, impedance detection is carried out to earphone and comprises: according to voltage divider principle, impedance detection is carried out to earphone.
Optionally, in another embodiment of the disclosure, the size of described default electric capacity is C, C=1/RT; Wherein, T is the time of described capacitor charging, and R is the output impedance of earphone power amplifier and the impedance sum of second circuit.
Optionally, in another embodiment of the disclosure, described change over switch is single-pole double-throw switch (SPDT).
Embodiment in said method embodiment has been described in detail in the embodiment of this device, will not elaborate explanation herein.
Accordingly, the disclosure also provides a kind of non-transitory computer-readable recording medium, when the instruction in described storage medium is performed by the processor of terminal, make terminal can perform a kind of method reducing earphone POP sound, described method comprises: after earphone inserts, impedance detection is carried out to earphone, to insert to make earphone and in impedance detection process, the POP sound that produces is reduced by the predetermined capacitive of parallel connection on described first circuit that is connected with the Chang Kaiduan of described change over switch, wherein, the common port of described change over switch is connected with earphone power amplifier, described first circuit is connected with earphone jack, after completing impedance detection, the Chang Kaiduan controlling described change over switch is connected with second circuit, and described second circuit is connected with earphone jack.
The block diagram of a kind of device 400 for reducing earphone POP sound of Fig. 4 according to an exemplary embodiment.Such as, device 400 can be mobile phone, computer, digital broadcast terminal, messaging devices, game console, flat-panel devices, Medical Devices, body-building equipment, personal digital assistant etc.
With reference to Fig. 4, device 400 can comprise following one or more assembly: processing components 402, memory 404, power supply module 406, multimedia groupware 408, audio-frequency assembly 410, the interface 412 of I/O (I/O), sensor cluster 414, and communications component 416.
The integrated operation of the usual control device 400 of processing components 402, such as with display, call, data communication, camera operation and record operate the operation be associated.Treatment element 402 can comprise one or more processor 420 to perform instruction, to complete all or part of step of above-mentioned method.In addition, processing components 402 can comprise one or more module, and what be convenient between processing components 402 and other assemblies is mutual.Such as, processing unit 402 can comprise multi-media module, mutual with what facilitate between multimedia groupware 408 and processing components 402.
Memory 404 is configured to store various types of data to be supported in the operation of equipment 400.The example of these data comprises for any application program of operation on device 400 or the instruction of method, contact data, telephone book data, message, picture, video etc.Memory 404 can be realized by the volatibility of any type or non-volatile memory device or their combination, as static RAM (SRAM), Electrically Erasable Read Only Memory (EEPROM), Erasable Programmable Read Only Memory EPROM (EPROM), programmable read only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, disk or CD.
The various assemblies that electric power assembly 406 is device 400 provide electric power.Electric power assembly 406 can comprise power-supply management system, one or more power supply, and other and the assembly generating, manage and distribute electric power for device 400 and be associated.
Multimedia groupware 408 is included in the screen providing an output interface between described device 400 and user.In certain embodiments, screen can comprise liquid crystal display (LCD) and touch panel (TP).If screen comprises touch panel, screen may be implemented as touch-screen, to receive the input signal from user.Touch panel comprises one or more touch sensor with the gesture on sensing touch, slip and touch panel.Described touch sensor can the border of not only sensing touch or sliding action, but also detects the duration relevant to described touch or slide and pressure.In certain embodiments, multimedia groupware 408 comprises a front-facing camera and/or post-positioned pick-up head.When equipment 400 is in operator scheme, during as screening-mode or video mode, front-facing camera and/or post-positioned pick-up head can receive outside multi-medium data.Each front-facing camera and post-positioned pick-up head can be fixing optical lens systems or have focal length and optical zoom ability.
Audio-frequency assembly 410 is configured to export and/or input audio signal.Such as, audio-frequency assembly 410 comprises a microphone (MIC), and when device 400 is in operator scheme, during as call model, logging mode and speech recognition mode, microphone is configured to receive external audio signal.The audio signal received can be stored in memory 404 further or be sent via communications component 416.In certain embodiments, audio-frequency assembly 410 also comprises a loud speaker, for output audio signal.
I/O interface 412 is for providing interface between processing components 402 and peripheral interface module, and above-mentioned peripheral interface module can be keyboard, some striking wheel, button etc.These buttons can include but not limited to: home button, volume button, start button and locking press button.
Sensor cluster 414 comprises one or more transducer, for providing the state estimation of various aspects for device 400.Such as, sensor cluster 414 can detect the opening/closing state of equipment 400, the relative positioning of assembly, such as described assembly is display and the keypad of device 400, the position of all right checkout gear 400 of sensor cluster 414 or device 400 1 assemblies changes, the presence or absence that user contacts with device 400, the variations in temperature of device 400 orientation or acceleration/deceleration and device 400.Sensor cluster 414 can comprise proximity transducer, be configured to without any physical contact time detect near the existence of object.Sensor cluster 414 can also comprise optical sensor, as CMOS or ccd image sensor, for using in imaging applications.In certain embodiments, this sensor cluster 414 can also comprise acceleration transducer, gyro sensor, Magnetic Sensor, pressure sensor or temperature sensor.
Communications component 416 is configured to the communication being convenient to wired or wireless mode between device 400 and other equipment.Device 400 can access the wireless network based on communication standard, as WiFi, 2G or 3G, or their combination.In one exemplary embodiment, communication component 416 receives from the broadcast singal of external broadcasting management system or broadcast related information via broadcast channel.In one exemplary embodiment, described communication component 416 also comprises near-field communication (NFC) module, to promote junction service.Such as, can based on radio-frequency (RF) identification (RFID) technology in NFC module, Infrared Data Association (IrDA) technology, ultra broadband (UWB) technology, bluetooth (BT) technology and other technologies realize.
In the exemplary embodiment, device 400 can be realized, for performing said method by one or more application specific integrated circuit (ASIC), digital signal processor (DSP), digital signal processing appts (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), controller, microcontroller, microprocessor or other electronic components.
In the exemplary embodiment, additionally provide a kind of non-transitory computer-readable recording medium comprising instruction, such as, comprise the memory 404 of instruction, above-mentioned instruction can perform said method by the processor 420 of device 400.Such as, described non-transitory computer-readable recording medium can be ROM, random access memory (RAM), CD-ROM, tape, floppy disk and optical data storage devices etc.
Those skilled in the art, at consideration specification and after putting into practice disclosed herein disclosing, will easily expect other embodiment of the present disclosure.The application is intended to contain any modification of the present disclosure, purposes or adaptations, and these modification, purposes or adaptations are followed general principle of the present disclosure and comprised the undocumented common practise in the art of the disclosure or conventional techniques means.Specification and embodiment are only regarded as exemplary, and true scope of the present disclosure and spirit are pointed out by claim below.
Should be understood that, the disclosure is not limited to precision architecture described above and illustrated in the accompanying drawings, and can carry out various amendment and change not departing from its scope.The scope of the present disclosure is only limited by appended claim.
Claims (12)
1. reduce a device for earphone POP sound, it is characterized in that, comprising: earphone power amplifier, change over switch, the first circuit, second circuit and processor, wherein:
The common port of described change over switch is connected with earphone power amplifier;
Described first circuit is parallel with default electric capacity, and described first circuit is connected with earphone jack;
Described second circuit is connected with earphone jack;
Described processor, for after earphone inserts, carries out impedance detection to earphone, inserts and in impedance detection process, the POP sound that produces is reduced by the described electric capacity of parallel connection on described first circuit that is connected with the Chang Kaiduan of described change over switch to make earphone; After completing impedance detection, the Chang Kaiduan controlling described change over switch is connected with described second circuit.
2. the device of reduction earphone POP sound according to claim 1, is characterized in that,
Described processor, also for after earphone inserts, suspends the output of audio frequency, and after the Chang Kaiduan controlling described change over switch is connected with described second circuit, recovers the output of described audio frequency.
3. the device of reduction earphone POP sound according to claim 1, is characterized in that,
Described processor, also for after described earphone is transferred to, the Chang Kaiduan controlling described change over switch is connected with described first circuit.
4. the device of reduction earphone POP sound according to claim 1, is characterized in that,
Described processor carries out impedance detection to earphone and comprises:
According to voltage divider principle, impedance detection is carried out to earphone.
5. the device of reduction earphone POP sound according to claim 1, is characterized in that,
The size of described default electric capacity is C,
C＝1/RT；
Wherein, T is the time of described capacitor charging, and R is the output impedance of earphone power amplifier and the impedance sum of the first circuit.
6. the device of reduction earphone POP sound according to claim 1, is characterized in that,
Described change over switch is single-pole double-throw switch (SPDT).
7. reduce a method for earphone POP sound, it is characterized in that, described method comprises:
After earphone inserts, impedance detection is carried out to earphone, to insert to make earphone and in impedance detection process, the POP sound that produces is reduced by the predetermined capacitive of parallel connection on described first circuit that is connected with the Chang Kaiduan of described change over switch, wherein, the common port of described change over switch is connected with earphone power amplifier, and described first circuit is connected with earphone jack;
After completing impedance detection, the Chang Kaiduan controlling described change over switch is connected with second circuit, and described second circuit is connected with earphone jack.
8. the method for reduction earphone POP sound according to claim 7, it is characterized in that, described method also comprises:
After earphone inserts, suspend the output of audio frequency, and after the Chang Kaiduan controlling described change over switch is connected with described second circuit, recover the output of described audio frequency.
9. the method for reduction earphone POP sound according to claim 7, it is characterized in that, described method also comprises:
After described earphone is transferred to, the Chang Kaiduan controlling described change over switch is connected with described first circuit.
10. the method for reduction earphone POP sound according to claim 7, is characterized in that,
Describedly impedance detection carried out to earphone comprise:
According to voltage divider principle, impedance detection is carried out to earphone.
The method of 11. reduction earphone POP sounds according to claim 7, is characterized in that,
The size of described default electric capacity is C,
C＝1/RT；
Wherein, T is the time of described capacitor charging, and R is the output impedance of earphone power amplifier and the impedance sum of second circuit.
The method of 12. reduction earphone POP sounds according to claim 7, is characterized in that,
Described change over switch is single-pole double-throw switch (SPDT).
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| US10903801B2 (en) | 2017-06-23 | 2021-01-26 | Huawei Technologies Co., Ltd. | Audio processing circuit and terminal device |
| CN109121043B (en) * | 2017-06-23 | 2021-09-03 | 华为技术有限公司 | Audio processing circuit and terminal equipment |
| CN109660903A (en) * | 2019-01-14 | 2019-04-19 | 安凯(广州)微电子技术有限公司 | A kind of earphone pop sound removing method, system and device |
| CN109660903B (en) * | 2019-01-14 | 2020-06-30 | 安凯(广州)微电子技术有限公司 | Earphone pop sound elimination method, system and device |
| CN110113692A (en) * | 2019-05-21 | 2019-08-09 | 合肥联宝信息技术有限公司 | A kind of sound signal outputting device, computer equipment and its control method |
| WO2020259295A1 (en) * | 2019-06-25 | 2020-12-30 | 维沃移动通信有限公司 | Mobile terminal and control method |
| CN110430497A (en) * | 2019-07-31 | 2019-11-08 | 深圳市睿耳电子有限公司 | A kind of circuit, Radiationproof screening apparatus for back-located antenna mobile telephone and earphone that control microphone is mute |
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