CN102098017B - Volume control circuit and device as well as multimedia equipment - Google Patents
Volume control circuit and device as well as multimedia equipment Download PDFInfo
- Publication number
- CN102098017B CN102098017B CN201010563382.0A CN201010563382A CN102098017B CN 102098017 B CN102098017 B CN 102098017B CN 201010563382 A CN201010563382 A CN 201010563382A CN 102098017 B CN102098017 B CN 102098017B
- Authority
- CN
- China
- Prior art keywords
- audio signal
- resistance
- circuit
- output
- amplifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Amplifiers (AREA)
Abstract
The invention is suitable for the field of multimedia sound processing and provides a volume control circuit and device as well as multimedia equipment. The volume control circuit comprises an audio signal preamplification circuit, a positive peak voltage acquisition circuit, a coefficient factor generation circuit and an audio signal amplitude change circuit. In the invention, an audio signal input to the volume control circuit from a signal source is preamplified, and the audio signal is regulated according to the reference voltage and the positive peak voltage corresponding to the preamplified audio signal, therefore, the audio signal is stabilized to the appointed strength.
Description
Technical field
The invention belongs to multimedia audio process field, relate in particular to a kind of volume control circuit, device and multimedia equipment.
Background technology
User, when using multimedia equipment, if carry out the switching of the projects such as channel, song, game, often has the situation that sound enlarges markedly or significantly reduces.Such as user is when watching TV, turntable can make sound of television enlarge markedly or significantly reduce; When user uses music player, switch different songs and also can make sound enlarge markedly or significantly reduce; User, when using the game machine of palm machine or other types, is switched different game and also can be made sound enlarge markedly or significantly reduce.The difference that the intensity of multimedia audio is not both due to signal source causes, and the difference in unlike signal source is often larger, so there will be the situation that enlarges markedly or significantly reduce of sound when switching the projects such as other channels, song or game.The unexpected variation of this sound has a certain impact to people's life, and while using multimedia equipment the late into the night such as user, sound increases the rest that can affect other people suddenly; Or when user uses multimedia equipment with earphone, sound increase suddenly can make people's dysacusis.People are more and more higher to multimedia performance requirements such as TVs simultaneously, and the multimedias such as TV need to be carried out to sound the processing such as the equilibrium of multiband sound, high bass boost control, and these processing preferably need to have more stable voice signal amplitude.
Under current technical background, generally adopt the gain of degenerative mode automatic volume control path or adopt the mode of restriction sound amplitude to prevent sound sudden change.But the defect of these methods is, may cause plosive or the noise of moment, and the amplitude that can not automatically improve weak sound is to realize stable voice signal output.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of volume control circuit, is intended to solve in prior art the problem that can not automatically regulate audio signal strength, realize the stable output of audio signal.
The embodiment of the present invention is achieved in that a kind of volume control circuit, and described volume control circuit comprises: audio signal pre-amplification circuit, positive peak voltage acquisition circuit, the coefficient factor produce circuit and audio signal luffing circuit;
Described audio signal pre-amplification circuit, that input is inputted is audio signal Audio_in, output is connected respectively with the input of described positive peak voltage acquisition circuit and the first input end of described audio signal luffing circuit, for audio signal Audio_in is carried out to pre-amplification, and to described positive peak voltage acquisition circuit and described audio signal luffing circuit, export the audio signal V_aud after pre-amplification respectively;
Described positive peak voltage acquisition circuit, output is connected with the first input end that the described coefficient factor produces circuit, for obtaining the positive peak voltage Vmax corresponding with described audio signal V_aud, and described positive peak voltage Vmax is produced to circuit output to the described coefficient factor;
The described coefficient factor produces circuit, the second input is the input of reference voltage Vref, output is connected with the second input of described audio signal luffing circuit, for generation of the coefficient factor K of the ratio relation in direct ratio with reference voltage Vref and described positive peak voltage Vmax, and export described coefficient factor K to described audio signal luffing circuit;
Described audio signal luffing circuit, that output is exported is audio signal Audio_out, for change the intensity of described audio signal V_aud according to described coefficient factor K, and the audio signal Audio_out after output intensity change.
Another object of the embodiment of the present invention is to provide a kind of sound volume control device that comprises above-mentioned volume control circuit.
Another object of the embodiment of the present invention is to provide a kind of multimedia equipment that comprises above-mentioned volume control circuit.
The embodiment of the present invention is carried out pre-amplification to the audio signal of the volume control circuit being input to from signal source, according to the corresponding positive peak voltage of the audio signal after reference voltage and pre-amplification, audio signal is adjusted, thereby audio signal is stablized to the intensity to appointment.
Accompanying drawing explanation
Fig. 1 is the fundamental diagram of the volume control circuit that provides of the embodiment of the present invention;
Fig. 2 is the circuit structure diagram of the volume control circuit that provides of the embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The embodiment of the present invention is carried out pre-amplification to be input to the audio signal of volume control circuit from signal source, according to the corresponding positive peak voltage of the audio signal after reference voltage and pre-amplification, audio signal is adjusted, thereby audio signal is stablized to the intensity to appointment.
The embodiment of the present invention is achieved in that a kind of volume control circuit, and described volume control circuit comprises: audio signal pre-amplification circuit, positive peak voltage acquisition circuit, the coefficient factor produce circuit and audio signal luffing circuit;
Described audio signal pre-amplification circuit, input is the input of audio signal Audio_in, output is connected respectively with the input of described positive peak voltage acquisition circuit and the first input end of described audio signal luffing circuit, for audio signal Audio_in is carried out to pre-amplification, and to described positive peak voltage acquisition circuit and described audio signal luffing circuit, export the audio signal V_aud after pre-amplification respectively;
Described positive peak voltage acquisition circuit, output is connected with the first input end that the described coefficient factor produces circuit, for obtaining the positive peak voltage Vmax corresponding with described audio signal V_aud, and described positive peak voltage Vmax is produced to circuit output to the described coefficient factor;
The described coefficient factor produces circuit, the second input is the input of reference voltage Vref, output is connected with the second input of described audio signal luffing circuit, for generation of the coefficient factor K of the ratio relation in direct ratio with reference voltage Vref and described positive peak voltage Vmax, and export described coefficient factor K to described audio signal luffing circuit;
Described audio signal luffing circuit, output is the output of audio signal Audio_out, for change the intensity of described audio signal V_aud according to described coefficient factor K, and the audio signal Audio_out after output intensity change.
embodiment mono-:
Fig. 1 shows the operation principle of the volume control circuit that the embodiment of the present invention provides, and only shows for convenience of explanation the part relevant to the embodiment of the present invention.
Wherein, audio signal pre-amplification circuit 11, input is the input of audio signal Audio_in, output is connected respectively with the input of positive peak voltage acquisition circuit 12 and the first input end of audio signal luffing circuit 14, for audio signal Audio_in is carried out to pre-amplification, and respectively to the audio signal V_aud after positive peak voltage acquisition circuit 12 and audio signal luffing circuit 14 output pre-amplifications;
Positive peak voltage acquisition circuit 12, output is connected with the first input end that the coefficient factor produces circuit 13, for obtaining the positive peak voltage Vmax corresponding with audio signal V_aud, and positive peak voltage Vmax is produced to circuit 13 outputs to the coefficient factor;
The coefficient factor produces circuit 13, the second input is the input of reference voltage Vref, output is connected with the second input of audio signal luffing circuit 14, for generation of the coefficient factor K of the ratio relation in direct ratio with reference voltage Vref and positive peak voltage Vmax, and to audio signal luffing circuit 14 output factor factor K;
Audio signal luffing circuit 14, output is the output of audio signal Audio_out, for change the intensity of audio signal V_aud according to coefficient factor K, and the audio signal Audio_out after output intensity change.
In real work, the audio signal Audio_in of 11 pairs of inputs of audio signal pre-amplification circuit amplifies preliminary treatment, prevent audio signal Audio_in because of amplitude too small, positive peak voltage acquisition circuit 12 can not get positive peak, output audio signal V_aud after 11 pairs of audio signal Audio_in pre-amplifications of audio signal pre-amplification circuit, and audio signal V_aud is exported to positive peak voltage acquisition circuit 12 and audio signal luffing circuit 14.
The audio signal V_aud of 12 pairs of inputs of positive peak voltage acquisition circuit processes, and obtains the positive peak voltage Vmax corresponding with the positive peak of audio signal V_aud, and positive peak voltage Vmax is exported to coefficient factor generation circuit 13.
The coefficient factor produces the positive peak voltage Vmax of 13 pairs of inputs of circuit and the reference voltage Vref of input compares after processing, to one of audio signal luffing circuit 14 output and positive peak voltage Vmax be inversely proportional to relation and with the proportional coefficient factor K of reference voltage Vref.Wherein, reference voltage Vref can be thought fixed level voltage, and the audio signal Audio_in signal strength signal intensity of input is larger, and positive peak voltage Vmax magnitude of voltage is higher, and coefficient factor K is less; Otherwise audio signal Audio_in signal strength signal intensity is more weak, positive peak voltage Vmax magnitude of voltage is lower, and coefficient factor K is larger.
Audio signal luffing circuit 14 changes the intensity of audio signal V_aud according to coefficient factor K, and make audio signal V_aud and COEFFICIENT K proportional, even intensity and the coefficient factor K of the audio signal Audio_out of output are proportional,, the audio signal Audio_out of the larger output of coefficient factor K is stronger, and the audio signal Audio_out signal of the less output of coefficient factor K is more weak; The intensity of the audio signal Audio_out of audio signal luffing circuit 14 energy constant outputs simultaneously, makes the voltage corresponding to audio signal Audio_out signal positive peak of output equate with reference level magnitude of voltage Vref.
The embodiment of the present invention is by carrying out pre-amplification the audio signal of the volume control circuit being input to from signal source, according to the corresponding positive peak voltage of the audio signal after reference voltage and pre-amplification, audio signal is adjusted, thereby audio signal is stablized to the intensity to appointment.
embodiment bis-:
Fig. 2 shows the circuit structure of the volume control circuit that the embodiment of the present invention provides, and only shows for convenience of explanation the part relevant to the embodiment of the present invention.
The volume control circuit that the embodiment of the present invention provides comprises that amplifier circuit for sound frequency signal 11, positive peak acquisition cuicuit 12, the coefficient factor produce circuit 13 and audio signal luffing circuit 14
Audio signal pre-amplification circuit 11 comprises:
Capacitor C 1, amplifier U1, resistance R 1, resistance R 2;
Wherein, the first end of capacitor C 1 is the input of audio signal Audio_in, and the second end is connected with the input in the same way of amplifier U1, for the flip-flop of Isolation input audio A duio_in;
The first end ground connection of resistance R 1, the second end is connected with the first end of resistance R 2;
The second end of resistance R 2 is connected with the input of positive peak voltage acquisition circuit;
The multiplication factor of audio signal pre-amplification circuit is determined by the resistance of resistance R 1 and resistance R 2.
The first end of amplifier U1 is connected with the second end of resistance R 1, and the 3rd end is connected respectively with the second end of resistance R 2 and the first input end of audio signal luffing circuit.
Positive peak voltage acquisition circuit 12 comprises:
Coupling capacitance C2, capacitor C 3, amplifier U2, resistance R 3, resistance R 4, resistance R 5, diode D1, diode D2;
Wherein, the first end of coupling capacitance C2 is connected with the output of audio signal pre-amplification circuit, and the second end is connected with the first end of resistance R 3;
The second end of resistance R 3 is connected with the input in the same way of amplifier U2;
The reverse input end of amplifier U2 is connected with the first end of resistance R 4, and the output of amplifier U2 is connected with the second end of resistance R 4;
The anode of diode D1 is connected with the output of amplifier U2, and negative electrode is connected with the first end of capacitor C 3;
The negative electrode of diode D2 is connected with the output of amplifier U2, plus earth;
The first end of capacitor C 3 is connected with the first end of resistance R 5, the second end ground connection;
The first end of resistance R 5 is connected with the first input end that the coefficient factor produces circuit, the second end ground connection.
In real work, resistance R 3, resistance R 4 and amplifier U2 form the first emitter follower 1201, and the output of amplifier U2 is identical with audio signal V_aud with the signal of input in the same way, has avoided the impact of positive peak voltage acquisition circuit 12 on signal V_aud simultaneously.When audio signal V_aud negative half-cycle arrives, diode D2 conducting, makes the 3rd pin of amplifier U2 be about 0V, not conducting of diode D1; When audio signal V_aud positive half period arrives, not conducting of diode D2, diode D1 conducting, capacitor C 3 is charged rapidly, until audio signal V_aud positive peak charges and finishes after arriving, voltage Vmax is the positive peak voltage of audio signal V_aud, and positive peak voltage Vmax will keep a period of time.The value of resistance R 5, capacitor C 3 has determined the retention time of positive peak voltage Vmax.Therefore positive peak voltage Vmax is dynamic change with the Strength Changes of input audio signal V_aud: the positive peak that is V_aud when the intensity grow of V_aud uprises, and positive peak voltage Vmax raises; When the weakened of V_aud is the positive peak step-down of V_aud, positive peak voltage Vmax reduces.
The coefficient factor produces circuit 13 and comprises:
Resistance R 6, resistance R 7, resistance R 8, resistance R 9, capacitor C 4, amplifier U3, amplifier U4, multiplier MUL1;
Wherein, the first end of resistance R 6 is connected with the output of positive peak voltage acquisition circuit, and the second end is connected with the input in the same way of amplifier U3;
The first end of capacitor C 4 is connected with the second end of resistance R 6, the second end ground connection;
The reverse input end of amplifier U3 is connected with the first end of resistance R 7, and output is connected with the second end of resistance R 7;
The first pin of multiplier MUL1 is connected with the second end of resistance R 7, and crus secunda is connected respectively with the output of amplifier U4 and the second input of audio signal luffing circuit, and tripod is connected with the first end of resistance R 8;
The second end of resistance R 8 connect with resistance R 9 after ground connection;
The reverse input end of amplifier U4 is connected with the second end of resistance R 8, the input that input is reference voltage Vref in the same way.
In real work, resistance R 6, capacitor C 4, amplifier U3, resistance R 7 form the second emitter follower 1301 together, align the impact of crest voltage Vmax to isolate multiplier MUL1.The signal of the 1st pin input of multiplier MUL1 is positive peak voltage Vmax.Resistance R 6, capacitor C 4 form filter circuit, filter the audio signal that may exist in positive peak voltage Vmax signal.Resistance R 8 and resistance R 9, amplifier U4 form amplifying circuit, and coefficient factor K is that h1 * (Vref/Vmax), h1 is determined by the resistance of resistance R 8 and resistance R 9.
Audio signal luffing circuit 14 comprises:
Resistance R 10, resistance R 11, resistance R 12, capacitor C 5, amplifier U5, multiplier MUL2;
Wherein, the first end of capacitor C 5 is connected with the output of audio signal pre-amplification circuit, and the second end is connected with the first end of resistance R 10;
Resistance R 10 second ends are connected with the input in the same way of amplifier U5;
The output of amplifier U5 is successively by resistance R 12 and the rear ground connection of resistance R 11, and reverse input end is connected with the contact of resistance R 12 with resistance R 11;
The first pin of multiplier MUL2 is connected with the output that the coefficient factor produces circuit, and crus secunda is connected with the output of amplifier U5, and tripod is connected with the output of audio signal Audio_out.
In real work, resistance R 10, amplifier U5, resistance R 11 and R12 form amplifier 1401, and the audio signal of the 3rd pin output of amplifier U5 is h2 * V_aud, and h1 is determined by resistance R 11 and R12.Therefore the audio signal Audio_out of multiplier MUL the 3rd pin output is:
h2×V_aud×K＝h2×h1×V_aud×（Vref/Vmax）＝h×Vref×（V_aud/Vmax）
Wherein: h=h2 * h1;
Vmax is the positive peak of audio signal V_aud, and the peak value of output audio signal Audio_out is h * Vref.Therefore the audio signal strength of output is stable, and audio signal Audio_in positive peak of its signal after pre-amplification of input is less than reference voltage Vref, automatically improves the intensity of audio signal, makes the positive peak of audio signal equal reference voltage Vref; Input audio signal Audio_in positive peak of its signal after pre-amplification is greater than reference voltage Vref, automatically reduces the intensity of audio signal, makes the positive peak of audio signal equal reference voltage Vref.
The volume control circuit that the embodiment of the present invention provides can regulate audio signal strength automatically, when audio signal strength is during lower than the intensity of appointment, automatically improves signal strength signal intensity and stablizes the intensity to appointment; When audio signal strength is during higher than the intensity of appointment, automatically reduce signal strength signal intensity and stablize the intensity to appointment.
embodiment tri-:
The volume control circuit that the embodiment of the present invention provides can be applied in sound volume control device, and these sound volume control devices can be widely used in the multimedia equipments such as TV, music player, game machine.
The embodiment of the present invention is carried out pre-amplification to the audio signal of the volume control circuit being input to from signal source, according to the corresponding positive peak voltage of the audio signal after reference voltage and pre-amplification, audio signal is adjusted, thereby audio signal is stablized to the intensity to appointment, when audio signal strength is during lower than the intensity of appointment, automatically improve signal strength signal intensity and stablize the intensity to appointment; When audio signal strength is during higher than the intensity of appointment, automatically reduce signal strength signal intensity and stablize the intensity to appointment.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a volume control circuit, is characterized in that, described volume control circuit comprises:
Audio signal pre-amplification circuit, positive peak voltage acquisition circuit, the coefficient factor produce circuit and audio signal luffing circuit;
Described audio signal pre-amplification circuit, that input is inputted is audio signal Audio_in, output is connected respectively with the input of described positive peak voltage acquisition circuit and the first input end of described audio signal luffing circuit, for audio signal Audio_in is carried out to pre-amplification, and to described positive peak voltage acquisition circuit and described audio signal luffing circuit, export the audio signal V_aud after pre-amplification respectively;
Described positive peak voltage acquisition circuit, output is connected with the first input end that the described coefficient factor produces circuit, for obtaining the positive peak voltage Vmax corresponding with described audio signal V_aud, and described positive peak voltage Vmax is produced to circuit output to the described coefficient factor;
The described coefficient factor produces circuit, the second input is the input of reference voltage Vref, output is connected with the second input of described audio signal luffing circuit, for generation of the coefficient factor K of the ratio relation in direct ratio with reference voltage Vref and described positive peak voltage Vmax, and export described coefficient factor K to described audio signal luffing circuit;
Described audio signal luffing circuit, that output is exported is audio signal Audio_out, for change the intensity of described audio signal V_aud according to described coefficient factor K, and the audio signal Audio_out after output intensity change.
2. volume control circuit as claimed in claim 1, is characterized in that, described audio signal pre-amplification circuit comprises:
Capacitor C 1, amplifier U1, resistance R 1, resistance R 2;
Wherein, the first end of described capacitor C 1 is audio signal input end, and the audio signal of input is Audio_in, and the second end is connected with the in-phase input end of described amplifier U1;
The first end ground connection of described resistance R 1, the second end is connected with the first end of described resistance R 2;
The second end of described resistance R 2 is connected with the output of described amplifier U1;
The inverting input of described amplifier U1 is connected with the second end of described resistance R 1, and output is connected with the first input end of described audio signal luffing circuit.
3. volume control circuit as claimed in claim 1, is characterized in that, described positive peak voltage acquisition circuit comprises:
Coupling capacitance C2, the first emitter follower, capacitor C 3, resistance R 5, diode D1, diode D2, described the first emitter follower comprises: resistance R 3, resistance R 4 and amplifier U2, the input in the same way of described amplifier U2 is connected with the second end of resistance R 3, between the output of the inverting input of described amplifier U2 and amplifier U2, by R4, be connected, the first end of R3 is the input of the first emitter follower, and the output of the first emitter follower is the output of amplifier U2;
Wherein, the first end of described coupling capacitance C2 is connected with the output of described audio signal pre-amplification circuit, and the second end is connected with the input of described the first emitter follower;
The anodic bonding of the output of described the first emitter follower and described diode D1;
The negative electrode of described diode D1 is connected with the first end of described capacitor C 3, the second end ground connection of described capacitor C 3;
The negative electrode of described diode D2 is connected with the output of described the first emitter follower, plus earth;
The first end of described resistance R 5 is connected with the first input end that the described coefficient factor produces circuit with the negative electrode of described diode D1 simultaneously, the second end ground connection.
4. volume control circuit as claimed in claim 1, is characterized in that, the described coefficient factor produces circuit and comprises:
The second emitter follower, resistance R 8, resistance R 9, amplifier U4, multiplier MUL1, described the second emitter follower comprises: resistance R 6, capacitor C 4, amplifier U3, resistance R 7, the in-phase input end of described amplifier U3 is connected with the first end of capacitor C 4 with resistance R 6 second ends respectively, the inverting input of described amplifier U3 is connected by resistance R 7 with the output of described amplifier U3, the input of the second emitter follower is the first end of resistance R 6, the output that the output of the second emitter follower is U3;
The input of described the second emitter follower is connected with the output of described positive peak voltage acquisition circuit, and output is connected with the first pin of described multiplier MUL1, the second end ground connection of capacitor C 4;
The crus secunda of described multiplier MUL1 is connected respectively with the second input of the output of described amplifier U4 and described audio signal luffing circuit, and tripod is connected with the first end of described resistance R 8;
The second end of described resistance R 8 connect with described resistance R 9 after ground connection;
The inverting input of described amplifier U4 is connected with the second end of described resistance R 8, and what in-phase input end was inputted is reference voltage Vref.
5. volume control circuit as claimed in claim 4, is characterized in that, described the second emitter follower comprises:
Resistance R 6, resistance R 7, amplifier U3, capacitor C 4;
Wherein, the first end of described resistance R 6 is connected with the output of described positive peak voltage acquisition circuit, and the second end is connected with the in-phase input end of described amplifier U3;
The first end of described capacitor C 4 is connected with the second end of described resistance R 6, the second end ground connection;
The inverting input of described amplifier U3 is connected with the first end of described resistance R 7, and the second end of output and described resistance R 7 is all connected with the first pin of described multiplier MUL1.
6. volume control circuit as claimed in claim 1, is characterized in that, described audio signal luffing circuit comprises:
Capacitor C 5, amplifier, multiplier MUL2;
Wherein, the first end of described capacitor C 5 is connected with the output of described audio signal pre-amplification circuit, and the second end is connected with the input of described amplifier;
The output of described amplifier is connected with the crus secunda of multiplier MUL2, another input end grounding of amplifier;
The first pin of described multiplier MUL2 is connected with the output that the described coefficient factor produces circuit, and tripod is connected with audio signal output end, and the audio signal of output is Audio_out.
7. volume control circuit as claimed in claim 6, is characterized in that, described amplifier comprises:
Resistance R 10, resistance R 11, resistance R 12, amplifier U5;
Wherein, the first end of described resistance R 10 is connected with the second end of described capacitor C 5, and the second end is connected with the in-phase input end of described amplifier U5;
The inverting input of described amplifier U5 is connected with the contact of described resistance R 12 with described resistance R 11, and output is connected with the crus secunda of described multiplier MUL2;
The first end ground connection of described resistance R 11, the second end is connected with the first end of described resistance R 12;
The second end of described resistance R 12 is connected with the output of described amplifier U5.
8. a sound volume control device that has comprised the volume control circuit described in claim 1 to 7 any one.
9. a multimedia equipment that has comprised the volume control circuit described in claim 1 to 7 any one.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010563382.0A CN102098017B (en) | 2010-11-29 | 2010-11-29 | Volume control circuit and device as well as multimedia equipment |
| HK11109614.4A HK1155567A1 (en) | 2010-11-29 | 2011-09-12 | Volume control circuit and device as well as multimedia equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010563382.0A CN102098017B (en) | 2010-11-29 | 2010-11-29 | Volume control circuit and device as well as multimedia equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102098017A CN102098017A (en) | 2011-06-15 |
| CN102098017B true CN102098017B (en) | 2014-03-12 |
Family
ID=44130914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010563382.0A Active CN102098017B (en) | 2010-11-29 | 2010-11-29 | Volume control circuit and device as well as multimedia equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102098017B (en) |
| HK (1) | HK1155567A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103745734B (en) * | 2014-01-02 | 2017-01-11 | 青岛海信电器股份有限公司 | Device and method for setting sound curve |
| CN112153315B (en) * | 2020-08-31 | 2023-08-11 | 惠州高盛达智显科技有限公司 | Signal source channel sound sensitivity adjusting method and system based on power protection feedback |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050014497A (en) * | 2003-07-31 | 2005-02-07 | 엘지전자 주식회사 | A Mobile Phone Having Auto Volume Control Device |
| CN101114819A (en) * | 2007-08-21 | 2008-01-30 | 深圳华为通信技术有限公司 | Sound volume controller |
| CN101370106A (en) * | 2007-08-15 | 2009-02-18 | 青岛海信电器股份有限公司 | Sound volume control method for audio processing equipment and television set |
| CN101645697A (en) * | 2008-08-07 | 2010-02-10 | 英业达股份有限公司 | System and method for controlling sound volume |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8416945B2 (en) * | 2004-03-26 | 2013-04-09 | Plantronics, Inc. | Adaptive duplexing for amplified telephone |
-
2010
- 2010-11-29 CN CN201010563382.0A patent/CN102098017B/en active Active
-
2011
- 2011-09-12 HK HK11109614.4A patent/HK1155567A1/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050014497A (en) * | 2003-07-31 | 2005-02-07 | 엘지전자 주식회사 | A Mobile Phone Having Auto Volume Control Device |
| CN101370106A (en) * | 2007-08-15 | 2009-02-18 | 青岛海信电器股份有限公司 | Sound volume control method for audio processing equipment and television set |
| CN101114819A (en) * | 2007-08-21 | 2008-01-30 | 深圳华为通信技术有限公司 | Sound volume controller |
| CN101645697A (en) * | 2008-08-07 | 2010-02-10 | 英业达股份有限公司 | System and method for controlling sound volume |
Also Published As
| Publication number | Publication date |
|---|---|
| HK1155567A1 (en) | 2012-05-18 |
| CN102098017A (en) | 2011-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104853280B (en) | A kind of microphone and its control method of expansible dynamic range | |
| CN109688514A (en) | A kind of high-voltage digital audio power amplification system | |
| CN103166587A (en) | Audio processing circuit | |
| CN101931369B (en) | Bridge output power supply voltage adaptive variable audio power amplifier | |
| CN102098017B (en) | Volume control circuit and device as well as multimedia equipment | |
| CN109120269A (en) | A kind of digital analog converter | |
| CN205265633U (en) | Anti interfering signal magnification system | |
| CN205453707U (en) | Infrared receiving circuit of anti power supply interference and infrared receiver | |
| CN105450191A (en) | Dual-line silicon microphone amplifier | |
| CN201499287U (en) | Sound equipment volume controller with environment noise feedback | |
| CN203205048U (en) | Multifunctional portable electric guitar | |
| CN203120140U (en) | Audio amplification circuit with standby function | |
| CN208433954U (en) | A kind of digital analog converter | |
| CN209375614U (en) | Signal acquisition circuit and measuring instrument | |
| CN207895428U (en) | Audio frequency broadcast system based on voltage follow | |
| CN102203693B (en) | Man-machine interaction feedback device and method thereof | |
| CN206389335U (en) | A kind of audio voltage follows circuit | |
| CN205986792U (en) | Variable gain amplifier circuit with high stable gain control | |
| CN106656087A (en) | Automatic gain control loop | |
| CN205610587U (en) | Amplitude modulation converting circuit | |
| CN202873032U (en) | Sound source adaptive control system | |
| CN203167212U (en) | Earphone output circuit and TV set | |
| CN203491981U (en) | Amplifying circuit used for computer signal tuning | |
| CN204290891U (en) | A kind of wideband power amplifer circuit | |
| CN203596865U (en) | Audio signal high-frequency compensation circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: DE Ref document number: 1155567 Country of ref document: HK |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: GR Ref document number: 1155567 Country of ref document: HK |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20110615 Assignee: SHENZHEN CHUANGWEI ELECTRONIC APPLIANCE TECH CO., LTD. Assignor: Shenzhen Skyworth-RGB Electronics Co., Ltd. Contract record no.: 2015440020347 Denomination of invention: Volume control circuit and device as well as multimedia equipment Granted publication date: 20140312 License type: Exclusive License Record date: 20151106 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model |