CN101350594A - Method, circuit and electronic device for eliminating start-up sound-breaking of audio circuit - Google Patents
Method, circuit and electronic device for eliminating start-up sound-breaking of audio circuit Download PDFInfo
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- CN101350594A CN101350594A CNA2008101419356A CN200810141935A CN101350594A CN 101350594 A CN101350594 A CN 101350594A CN A2008101419356 A CNA2008101419356 A CN A2008101419356A CN 200810141935 A CN200810141935 A CN 200810141935A CN 101350594 A CN101350594 A CN 101350594A
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Abstract
The present invention discloses a method of eliminating breaking sound of audio circuit, a circuit and an electronic device thereof. The audio circuit comprises a blocking DC capacitance C, a control unit and a bypass switch K; wherein, one end of the bypass switch K is connected with the blocking capacitance C, and the other end is connected with the ground; the control unit is used for controlling the switching state of the bypass switch. The method adopts the bypass function of the switching circuit, so that the impulse voltage generated at the turning-on moment can be released through the bypass; then the impulse voltage is prevented from being transmitted from the audio output device; therefore, the method prevents the breaking sound in the turning-on process, and improves the feelings of the user.
Description
Technical field
The present invention relates to the electronic equipment communication field, specifically, relate to a kind of method, circuit and electronic equipment thereof of eliminating breaking sound of audio circuit.
Background technology
At present; in voicefrequency circuit is used; the capacitor element of stopping direct current is arranged usually at audio frequency output channel; in start moment since in the circuit charge and discharge phenomena of electric capacity can produce surge voltage usually; by strong sound of audio frequency apparatuses such as loudspeaker or earphone output; be exactly usually said distorsion (POP) sound, this sound can bring bad impression for the audio frequency apparatus user, and the user may get a fright or bring the situations such as damage of ear etc.
The inventor finds in realizing process of the present invention, does not also eliminate the technical scheme of voicefrequency circuit start-up sound-breaking in the prior art.
Summary of the invention
The embodiment of the invention provides a kind of method, circuit and electronic equipment thereof of eliminating the voicefrequency circuit start-up sound-breaking, to eliminate the distorsion of existing voicefrequency circuit when starting shooting, improves user's use experience.
A kind of voicefrequency circuit that the embodiment of the invention provides comprises: capacitance C, control unit and by-pass switch K, wherein, described by-pass switch K one end is connected with capacitance C, other end ground connection, the folding condition of described control unit control by-pass switch.
The embodiment of the invention provides a kind of electronic equipment, comprise audio signal input unit, audio signal processing unit, the audio signal output unit, wherein, audio signal processing unit is connected with audio signal input unit and audio signal output unit respectively, and described audio signal processing unit further comprises: capacitance C, control unit and by-pass switch K, and described by-pass switch K one end is connected with capacitance C, other end ground connection, the folding condition of described control unit control by-pass switch.
A kind of method of eliminating the voicefrequency circuit start-up sound-breaking that the embodiment of the invention provides comprises:
Receive off signal and control by-pass switch ground connection,
Disconnect and being connected of ground when receiving starting-up signal and entering start stable state time control by-pass switch.
The embodiment of the invention makes the surge voltage in start moment generation be released from bypass by utilizing the bypass functionality of switching circuit, avoids surge voltage to export from audio output device, thereby has avoided the generation of start-up sound-breaking, improves user's use experience.
Description of drawings
Fig. 1 is a voicefrequency circuit embodiment circuit diagram of the present invention;
Fig. 2 is an electronic equipment embodiment electronic equipment schematic diagram of the present invention;
Fig. 3 eliminates the method embodiment flow chart of voicefrequency circuit start-up sound-breaking for the present invention.
Embodiment
Below by the technical scheme that further specifies the embodiment of the invention in conjunction with the accompanying drawings.
As shown in Figure 1, be voicefrequency circuit embodiment circuit diagram of the present invention.This voicefrequency circuit comprises: capacitance C, control unit 1 and by-pass switch K, wherein, described by-pass switch K one end is connected with capacitance C, other end ground connection, the folding condition of described control unit 1 control by-pass switch.
In embodiments of the present invention, adopt capacitance C isolated DC signal on the voicefrequency circuit sound passage, audio signal outputs to audio output apparatus after by capacitance C, it is load, simultaneously, parallel control loop on the audio output line of voicefrequency circuit sound passage, be by-pass switch K, this by-pass switch can be realized the device of electronic switch for metal-oxide half field effect transistor MOSFET or triode etc., and this by-pass switch K is controlled by logic control signal by control unit 1, such as, when logic control signal is 1, by-pass switch K closure, when logic control signal was 0, by-pass switch K disconnected.In the present embodiment, when by-pass switch K adopted MOSFET, control unit 1 produced the control logic signal by software control universal input/output interface GPIO, and MOSFET response logic control signal is carried out switch and switched.In addition, according to different switchtypes, control unit 1 can increase the drive circuit (not shown), such as, when adopting the voltage-type switch, the operating voltage of voicefrequency circuit can be converted to the driving voltage of switch by drive circuit.
Present embodiment makes the surge voltage of start moment generation be released from bypass by utilizing the bypass functionality of switching circuit, avoids surge voltage to export from audio output apparatus, thereby has avoided the generation of voicefrequency circuit start-up sound-breaking, improves user's use experience.
As shown in Figure 2, be electronic equipment embodiment electronic equipment schematic diagram of the present invention.This electronic equipment comprises audio signal input unit 1, audio signal processing unit 2, audio signal output unit 3, audio signal processing unit 2 is connected with audio signal input unit 1 and audio signal output unit 3 respectively, wherein, audio signal processing unit adopts the voicefrequency circuit in the foregoing description, audio signal processing unit further comprises: capacitance C, control unit 21 and by-pass switch K, described by-pass switch K one end is connected with capacitance C, other end ground connection, the folding condition of described control unit 21 control by-pass switches.The present invention executes in the example, and the user will be given by the audio frequency apparatus (not shown) through the voice output that audio signal processing unit was handled such as sound equipment or earphone etc. in audio signal output unit 3.This class of electronic devices can comprise the equipment of audio signal processing circuit for portable terminal or music player etc.
Present embodiment comprises the audio signal processing circuit of by-pass switch by utilization, the surge voltage of electronic equipment start moment generation is released from bypass, avoid surge voltage to export, thereby avoided the generation of electronic equipment start-up sound-breaking, improve user's use experience from audio frequency apparatus.
As shown in Figure 3, eliminate the method embodiment flow chart of voicefrequency circuit start-up sound-breaking for the present invention.This method comprises:
301, receive off signal and control by-pass switch ground connection.
In the embodiment of the invention, the realization of voicefrequency circuit employing by-pass switch is connected or disconnection with ground, and this by-pass switch is generally electronic switch, and the disconnection that realizes switch by the receive logic control signal is with closed.Logic control signal is realized by software control GPIO by control unit.After voicefrequency circuit received off signal, voicefrequency circuit was in off position, and control unit produces logic control signal control by-pass switch ground connection, and the signal that transmits on the audio signal wire can switch to ground.
303, disconnect and being connected of ground when receiving starting-up signal and entering start stable state time control by-pass switch.
After voicefrequency circuit receives starting-up signal, when voicefrequency circuit enters operating state, the capacitance C of this voicefrequency circuit is in charged state, to produce temporary impact voltage, at this moment, because by-pass switch ground connection, this surge voltage directly switches to ground through by-pass switch, avoid this surge voltage to export from audio output apparatus, the user of audio output apparatus can not experience distorsion, but because by-pass switch ground connection, if audio input signal is arranged when audio signal wire transmits this moment, also will switch to ground, therefore, after start enters stable state, when promptly audio frequency apparatus is in normal operating conditions, the audio signal of the transmission on the audio signal wire needs being connected of bypass switch opens and ground, so that can be exported at audio output apparatus.At this moment, control switch judges whether to enter the start stable state, usually by the software control logic control signal of delaying time, this delay time can guarantee that surge voltage is released, concrete delay time can be according to concrete test result decision, it enters the asynchronism(-nization) of stable state different electronic equipments, such as, after tested certain music player enter the start stable state time be 0.2 second, then the control switch of voicefrequency circuit can be by setting start after 0.2 second time-delay back disconnects and being connected of ground by logic control signal control by-pass switch, can normally on audio output apparatus, export with the assurance audio input signal through audio signal wire.
Present embodiment is by the disconnection between by-pass switch and the ground or be connected, and the surge voltage that produces of avoiding starting shooting is exported from audio output apparatus, thereby has avoided the generation of start-up sound-breaking, improves user's use experience.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1, a kind of voicefrequency circuit is characterized in that, comprising: capacitance C, control unit and by-pass switch K is characterized in that described by-pass switch K one end is connected with capacitance C, other end ground connection, the folding condition of described control unit control by-pass switch.
2, voicefrequency circuit according to claim 1 is characterized in that, the end that described capacitance C is connected with by-pass switch connects load.
3, voicefrequency circuit according to claim 1 and 2 is characterized in that, described by-pass switch is metal-oxide half field effect transistor MOSFET or triode.
4, voicefrequency circuit according to claim 1 and 2 is characterized in that, described control unit is by the folding condition of logic control signal control by-pass switch.
5, voicefrequency circuit according to claim 4, described logic control signal is realized by software control general input GPIO.
6, voicefrequency circuit according to claim 4 is characterized in that, described control unit further comprises drive circuit.
7, a kind of electronic equipment, comprise audio signal input unit, audio signal processing unit, the audio signal output unit, it is characterized in that, audio signal processing unit is connected with audio signal input unit and audio signal output unit respectively, and described audio signal processing unit further comprises: capacitance C, control unit and by-pass switch K, and described by-pass switch K one end is connected with capacitance C, other end ground connection, the folding condition of described control unit control by-pass switch.
8, electronic equipment according to claim 7 is characterized in that, the two ends of capacitance C connect audio signal input unit and audio signal output unit respectively.
9, a kind of method of eliminating the voicefrequency circuit start-up sound-breaking is characterized in that, comprising:
Receive off signal and control by-pass switch ground connection,
Disconnect and being connected of ground when receiving starting-up signal and entering start stable state time control by-pass switch.
10, method according to claim 9 is characterized in that, is judged to be through the time-delay of setting and enters described start stable state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101419356A CN101350594B (en) | 2008-08-21 | 2008-08-21 | Method, circuit and electronic device for eliminating start-up sound-breaking of audio circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101419356A CN101350594B (en) | 2008-08-21 | 2008-08-21 | Method, circuit and electronic device for eliminating start-up sound-breaking of audio circuit |
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| Publication Number | Publication Date |
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| CN101350594A true CN101350594A (en) | 2009-01-21 |
| CN101350594B CN101350594B (en) | 2011-07-20 |
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| CN2008101419356A Active CN101350594B (en) | 2008-08-21 | 2008-08-21 | Method, circuit and electronic device for eliminating start-up sound-breaking of audio circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101924969A (en) * | 2009-06-17 | 2010-12-22 | 晨星软件研发(深圳)有限公司 | Audio frequency controller capable of removing sonic booms and method for removing sonic booms |
| CN103453953A (en) * | 2013-08-20 | 2013-12-18 | 杭州云谷科技有限公司 | Signal conditioning circuit of electromagnetic flow meter, and conditioning method and application thereof |
| CN103974169A (en) * | 2013-01-24 | 2014-08-06 | 宏碁股份有限公司 | Audio processing device and audio processing method |
| CN107911776A (en) * | 2017-11-30 | 2018-04-13 | 珠海亿智电子科技有限公司 | A kind of method for eliminating audio frequency power amplifier and powering on POP sound |
| CN109729479A (en) * | 2017-10-31 | 2019-05-07 | 华为技术有限公司 | Audio playing circuit and audio-frequence player device |
-
2008
- 2008-08-21 CN CN2008101419356A patent/CN101350594B/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101924969A (en) * | 2009-06-17 | 2010-12-22 | 晨星软件研发(深圳)有限公司 | Audio frequency controller capable of removing sonic booms and method for removing sonic booms |
| CN101924969B (en) * | 2009-06-17 | 2017-03-22 | 晨星软件研发(深圳)有限公司 | Audio frequency controller capable of removing sonic booms and method for removing sonic booms |
| CN103974169A (en) * | 2013-01-24 | 2014-08-06 | 宏碁股份有限公司 | Audio processing device and audio processing method |
| CN103974169B (en) * | 2013-01-24 | 2018-01-05 | 宏碁股份有限公司 | Apparatus for processing audio and audio-frequency processing method |
| CN103453953A (en) * | 2013-08-20 | 2013-12-18 | 杭州云谷科技有限公司 | Signal conditioning circuit of electromagnetic flow meter, and conditioning method and application thereof |
| CN103453953B (en) * | 2013-08-20 | 2016-01-20 | 杭州云谷科技有限公司 | A kind of electromagnetic flowmeter signal modulate circuit and Opsonizing method thereof and application |
| CN109729479A (en) * | 2017-10-31 | 2019-05-07 | 华为技术有限公司 | Audio playing circuit and audio-frequence player device |
| US11139784B2 (en) | 2017-10-31 | 2021-10-05 | Huawei Technologies Co., Ltd. | Audio play circuit and audio play device |
| CN107911776A (en) * | 2017-11-30 | 2018-04-13 | 珠海亿智电子科技有限公司 | A kind of method for eliminating audio frequency power amplifier and powering on POP sound |
| CN107911776B (en) * | 2017-11-30 | 2020-09-22 | 珠海亿智电子科技有限公司 | Method for eliminating POP sound on audio power amplifier |
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| Publication number | Publication date |
|---|---|
| CN101350594B (en) | 2011-07-20 |
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Effective date of registration: 20171121 Address after: Metro Songshan Lake high tech Industrial Development Zone, Guangdong Province, Dongguan City Road 523808 No. 2 South Factory (1) project B2 -5 production workshop Patentee after: HUAWEI terminal (Dongguan) Co., Ltd. Address before: 518129 Longgang District, Guangdong, Bantian HUAWEI base B District, building 2, building No. Patentee before: Huawei Device Co., Ltd. |
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Address after: 523808 Southern Factory Building (Phase I) Project B2 Production Plant-5, New Town Avenue, Songshan Lake High-tech Industrial Development Zone, Dongguan City, Guangdong Province Patentee after: Huawei Device Co., Ltd. Address before: 523808 Southern Factory Building (Phase I) Project B2 Production Plant-5, New Town Avenue, Songshan Lake High-tech Industrial Development Zone, Dongguan City, Guangdong Province Patentee before: HUAWEI terminal (Dongguan) Co., Ltd. |