CN205017561U - Electronic equipment and suppression circuit of earphone plug plosive thereof - Google Patents
Electronic equipment and suppression circuit of earphone plug plosive thereof Download PDFInfo
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- CN205017561U CN205017561U CN201520643952.5U CN201520643952U CN205017561U CN 205017561 U CN205017561 U CN 205017561U CN 201520643952 U CN201520643952 U CN 201520643952U CN 205017561 U CN205017561 U CN 205017561U
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- plosive
- suppression circuit
- common port
- headset
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Abstract
The utility model relates to an electronic circuit field discloses the suppression circuit of an earphone plug plosive. In the carrier roller device, the suppression circuit of earphone plug plosive contains: earphone driver, analog switch, headphone connector and switching control ware, analog switch has common port, normal close end, normally opens end and control end, the common port is connected to the earphone driver, and headphone connector, switching control ware connection control end are connected to the normal close end, wherein, analog switch selects a ground to be connected to common port no. 2 under the control of switching control ware normal close end with normally open the end, people's ear is heard in the time of effectively eliminating the earphone plug plosive to enhance product performance, the reinforcing user uses the impression.
Description
Technical field
The utility model relates to electronic technology field, particularly a kind of electronic equipment and the plosive suppression circuit of headset plugging thereof.
Background technology
Along with the development of science and technology, the requirement of people to quality of the life is more and more higher, also more and more higher to the requirement of life sound intermediate frequency and video quality.In public places, people carry out the output of audio frequency often through earphone, due to when earphone insert or when extracting, earphone drives first time power on or wake up from power-down mode, in output signal with direct current biasing be directly added to the two ends of electric capacity, the Voltage Establishment process at electric capacity two ends can produce a momentary charge electric current, in like manner power-off can produce an instant discharge current, channel again due to this level transition is wider, in the present earphone load of electrofluid, just defines the plosive of people's ear audible.
Solving plosive scheme in prior art is: the common return of earphone socket is earth-free, but connect the bias voltage of a normally headphone driver supply voltage half, such headphone driver output signal relatively this bias voltage is the level of Symmetrical, no longer needs electric capacity.But this scheme has a very large hidden danger, if that is exactly insert metallic foreign body in earphone socket can cause common return shorted to earth, probably cause overheated generation dangerous.
Utility model content
The purpose of this utility model is to provide a kind of headset plugging plosive suppression circuit, makes it possible to eliminate the plosive produced when earphone inserts or extracts, and with low cost.
For solving the problems of the technologies described above, execution mode of the present utility model provides the plosive suppression circuit of a kind of headset plugging, comprises: headphone driver, analog switch, headset connector and switch controller; Described analog switch has common port, normal-closed end, Chang Kaiduan and control end; Described headphone driver connects described common port, and described normal-closed end connects described headset connector, and described switch controller connects described control end; Wherein, described common port, under the control of described switch controller, is alternatively connected to described normal-closed end and normal beginning by described analog switch.
Of the present utility modelly embodiment further provides a kind of electronic equipment, comprise the plosive suppression circuit of above-mentioned headset plugging.
Execution mode of the present utility model in terms of existing technologies, due to when earphone inserts or the time of extracting, the common port of switch controller control simulation switch is connected with Chang Kaiduan, make the plosive capacitor charge and discharge energy of generation by GND (ground wire, ground, GND) discharge, at the end of plosive, the common port of switch controller control simulation switch is again connected with normal-closed end, makes headset connector receive the audio signal of headphone driver.Thus eliminate the plosive of people's ear audible when inserting or extract earphone, and owing to only adding analog switch, make the utility model with low cost.
In addition, described headphone driver has L channel output pin and R channel output pin; Described common port has 2 pins, corresponding to described L channel output pin and R channel output pin.Due to headphone driver have L channel and R channel point, make the audio signal of the left and right acoustic channels of headphone driver by complete the transferring out of common port, thus the loss of signal can be reduced so common port has 2 pins.
In addition, described switch controller at least comprises application processor; A universal input of described application processor exports GPIO port and is connected to described control end.Application processor can measure plosive duration, thus adopts application processor as switch controller, without the need to additionally increasing hardware.
In addition, described control end has 2 pins, and a described GPIO is connected to described 2 pins.
In addition, described normal-closed end by left and right sound track signals line to being connected to described headset connector.
In addition, described Chang Kaiduan has 2 pins, respectively by load resistance ground connection.Because headphone driver has the output pin of two sound channels in left and right, common port and control end all have 2 pins, can mate so Chang Kaiduan has 2 pins with above-mentioned common port and control end.Headphone driver direct ground connection when Chang Kaiduan can be avoided to be connected with common port by load resistance ground connection, thus protect other elements on headphone driver and circuit.
In addition, the resistance value of the load resistance that 2 pins of described Chang Kaiduan connect is equal.Load resistance resistance value is equal can make two average share current of circuit, burns the probability of circuit element when reducing short circuit, thus improves coefficient of safety.
Accompanying drawing explanation
Fig. 1 is the construction module schematic diagram of the plosive suppression circuit of a kind of headset plugging;
Fig. 2 is the electrical block diagram of the plosive suppression circuit of a kind of headset plugging.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, each execution mode of the present utility model is explained in detail.But, persons of ordinary skill in the art may appreciate that in each execution mode of the utility model, proposing many ins and outs to make reader understand the application better.But, even without these ins and outs with based on the many variations of following execution mode and amendment, each claim of the application technical scheme required for protection also can be realized.
First execution mode of the present utility model relates to the plosive suppression circuit of a kind of headset plugging.As shown in Figure 1, described circuit comprises: headphone driver, analog switch, headset connector, comprise the switch controller of application processor.
Wherein, analog switch has common port, normal-closed end, Chang Kaiduan and control end.The common port of analog switch is connected with headphone driver, and audio signal is passed to other ends by common port by headphone driver; Normal-closed end is connected with headset connector, and headset connector receives the audio signal of headphone driver from normal-closed end; Control end is connected with switch controller.Common port, under the control of switch controller, is alternatively connected to normal-closed end and normal beginning by analog switch.Such as switch controller sends high-level control signal to common port, makes common port be connected with normal-closed end; Send low level control signal to common port, common port was connected with the normal beginning.
Specifically, as shown in Figure 2, headphone driver has L channel output pin EARPHNOE_L and R channel output pin EARPHNOE_R.2 pin COM1 and COM2 of the common port of analog switch correspond respectively to L channel output pin EARPHNOE_L and R channel output pin EARPHNOE_R.2 pin IN1 and IN2 of the control end of analog switch, are connected with a GPIO port of application processor.2 pin NC1 and NC2 of the normal-closed end of analog switch, by left and right sound track signals line to 2 pin EAR_L and EAR_R being connected to described headset connector.2 pin NO1 and NO2 that the Chang Kaiduan of analog switch has are respectively by load resistance ground connection.It is worth mentioning that, can the resistance value of the load resistance that 2 of a Chang Kaiduan pin connects be set to equal, load resistance resistance value is equal can make C4 and A4 two average share current of circuit, burns the probability of circuit element when reducing short circuit, thus improves coefficient of safety.
Left channel audio signal is passed to the pin EAR_L of headset connector by the L channel output pin EARPHNOE_L of headphone driver by the pin COM1 of common port and the pin NC1 of normal-closed end; Right channel audio signal is passed to the pin EAR_R of headset connector by the R channel output pin EARPHNOE_R of headphone driver by the pin COM2 of common port and the pin NC2 of normal-closed end.If earphone is connected with headset connector, so earphone just can receive and output audio signal.
What deserves to be explained is, application processor can be adopted to carry out the switching of control simulation switch as switch controller.Specifically, a GPIO (universal input/output, GeneralPurposeInputOutput, the GPIO) port of application processor is connected to the control end of analog switch.
Application processor is connected with headset connector, electric capacity is also connected with headset connector, the change that earphone inserts the electric capacity both end voltage caused makes capacitor charging, namely start to produce plosive, because application processor and electric capacity are in same circuit, so the voltage at fracture two ends also changes in application processor.Application processor is by detecting that the change of wherein fracture both end voltage just can judge that plosive starts to occur.When the voltage that electric capacity does not recharge i.e. electric capacity two ends no longer changes, plosive just disappears.Because application processor and electric capacity are in same circuit, so when the voltage at electric capacity two ends no longer changes in application processor the voltage at fracture two ends also no longer change, namely application processor detects that the voltage at middle fracture two ends no longer changes and just can confirm that plosive disappears.Namely application processor starts to produce plosive by the insertion of calculating earphone just can record the plosive duration to the time difference that plosive disappears.When earphone is extracted, from low to high, in like manner, application processor can record when earphone is extracted and produce the plosive duration voltage at application processor middle port two ends.Therefore, switching time of analog switch can be set according to the above-mentioned duration recorded.
Such as the plosive duration that earphone inserts or extracts is all 1 second, and so switching time is all 1 second.Switch controller sends low level control signal to 2 pin IN1 and IN2 of control end, and 2 pin COM1 with COM2 controlling common port are connected with 2 pin NO1 with NO2 of Chang Kaiduan respectively.Produce plosive capacitor charge and discharge energy to be discharged by GND port.After 1 second, switch controller sends high-level control signal to 2 pin IN1 and IN2 of control end, and 2 pin COM1 with COM2 controlling common port are connected with 2 pin NC1 with NC2 of normal-closed end respectively.
In sum, the common port of analog switch by under the control of switch controller, can be connected to Chang Kaiduan, be connected to normal-closed end again after plosive terminates by present embodiment, thus eliminates the plosive of earphone insertion or generation when extracting.And owing to only adding analog switch and two load resistances, make cost compare cheap, be easy to promote.
Second execution mode of the present utility model relates to a kind of electronic equipment.This electronic equipment comprises the plosive suppression circuit of headset plugging of the first execution mode.This electronic equipment can be the terminal equipment such as mobile phone or panel computer.Embodiment is identical with the first execution mode, does not repeat herein.
Present embodiment makes practicality of the present utility model greatly improve, and makes can extensively promote in actual applications to become a reality.
Persons of ordinary skill in the art may appreciate that the respective embodiments described above realize specific embodiment of the utility model, and in actual applications, various change can be done to it in the form and details, and do not depart from spirit and scope of the present utility model.
Claims (8)
1. the plosive suppression circuit of headset plugging, is characterized in that, comprise: headphone driver, analog switch, headset connector and switch controller;
Described analog switch has common port, normal-closed end, Chang Kaiduan and control end;
Described headphone driver connects described common port, and described normal-closed end connects described headset connector, and described switch controller connects described control end;
Wherein, described common port, under the control of described switch controller, is alternatively connected to described normal-closed end and normal beginning by described analog switch.
2. the plosive suppression circuit of headset plugging according to claim 1, is characterized in that, described headphone driver has L channel output pin and R channel output pin;
Described common port has 2 pins, corresponding to described L channel output pin and R channel output pin.
3. the plosive suppression circuit of headset plugging according to claim 1, it is characterized in that, described switch controller at least comprises application processor;
A universal input of described application processor exports GPIO port and is connected to described control end.
4. the plosive suppression circuit of headset plugging according to claim 3, is characterized in that, described control end has 2 pins, and a described universal input exports GPIO port and is connected to described 2 pins.
5. the plosive suppression circuit of headset plugging according to claim 1, is characterized in that, described normal-closed end by left and right sound track signals line to being connected to described headset connector.
6. the plosive suppression circuit of headset plugging according to claim 1, is characterized in that, described Chang Kaiduan has 2 pins, respectively by load resistance ground connection.
7. the plosive suppression circuit of headset plugging according to claim 6, is characterized in that, the resistance value of the load resistance that 2 pins of described Chang Kaiduan connect is equal.
8. an electronic equipment, is characterized in that, comprises the plosive suppression circuit of headset plugging as described in claim 1 to 7 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520643952.5U CN205017561U (en) | 2015-08-24 | 2015-08-24 | Electronic equipment and suppression circuit of earphone plug plosive thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520643952.5U CN205017561U (en) | 2015-08-24 | 2015-08-24 | Electronic equipment and suppression circuit of earphone plug plosive thereof |
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| CN205017561U true CN205017561U (en) | 2016-02-03 |
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| CN201520643952.5U Expired - Fee Related CN205017561U (en) | 2015-08-24 | 2015-08-24 | Electronic equipment and suppression circuit of earphone plug plosive thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106131729A (en) * | 2016-08-24 | 2016-11-16 | 成都市极米科技有限公司 | Earphone control circuit and method |
| CN106612375A (en) * | 2016-12-23 | 2017-05-03 | 努比亚技术有限公司 | Mobile terminal and sound effect processing method of mobile terminal |
| CN112019172A (en) * | 2020-09-03 | 2020-12-01 | 厦门市三安集成电路有限公司 | Gate drive circuit of gallium nitride device |
| CN117278904A (en) * | 2023-11-03 | 2023-12-22 | 荣耀终端有限公司 | Earphone control circuit, earphone control method and electronic equipment |
-
2015
- 2015-08-24 CN CN201520643952.5U patent/CN205017561U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106131729A (en) * | 2016-08-24 | 2016-11-16 | 成都市极米科技有限公司 | Earphone control circuit and method |
| CN106131729B (en) * | 2016-08-24 | 2019-07-09 | 成都市极米科技有限公司 | Earphone control circuit and method |
| CN106612375A (en) * | 2016-12-23 | 2017-05-03 | 努比亚技术有限公司 | Mobile terminal and sound effect processing method of mobile terminal |
| CN106612375B (en) * | 2016-12-23 | 2020-03-13 | 努比亚技术有限公司 | Mobile terminal and sound effect processing method thereof |
| CN112019172A (en) * | 2020-09-03 | 2020-12-01 | 厦门市三安集成电路有限公司 | Gate drive circuit of gallium nitride device |
| CN112019172B (en) * | 2020-09-03 | 2023-08-08 | 厦门市三安集成电路有限公司 | Grid driving circuit of gallium nitride device |
| CN117278904A (en) * | 2023-11-03 | 2023-12-22 | 荣耀终端有限公司 | Earphone control circuit, earphone control method and electronic equipment |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160203 Termination date: 20190824 |