CN102340723B - Stereo audio signal separation circuit and audio equipment - Google Patents
Stereo audio signal separation circuit and audio equipment Download PDFInfo
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- CN102340723B CN102340723B CN2011101039931A CN201110103993A CN102340723B CN 102340723 B CN102340723 B CN 102340723B CN 2011101039931 A CN2011101039931 A CN 2011101039931A CN 201110103993 A CN201110103993 A CN 201110103993A CN 102340723 B CN102340723 B CN 102340723B
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Abstract
The invention is applied to the field of signal processing and provides a stereo audio signal separation circuit and audio equipment, wherein the stereo audio signal separation circuit comprises a stereo clock generating module, a clock delaying module and an audio amplifying module. In the embodiment of the invention, the stereo audio signal separation circuit is used for carrying out delayed time processing on a received stereo clock signal output from the stereo clock generating module through the clock delaying module to output a clock delaying signal, and the audio amplifying module is used for modulating a received stereo audio signal output from an audio signal generator according to the clock delaying signal, so that the separation degree of the stereo audio signal is increased, and the acousticperspective is enhanced.
Description
Technical field
The invention belongs to the signal process field, relate in particular to a kind of stereo audio signal split circuit and audio frequency apparatus.
Background technology
Stereo crosstalk just refers to the separating degree between the sound channel of two of left and right in stereo component system, in fact it reflected two degree that sound channel is crosstalked mutually in left and right, if it is larger to crosstalk between two sound channels, the third dimension of sound will be weakened so, and this can affect user's experience undoubtedly.
Existing stereo circuit is all to adopt identical clock to modulate the D genus audio power amplifier, yet due to shared identical clock, the time of occurrence on the clock edge of input power pipe also can be the same, now can the operating voltage environment of circuit be exerted an influence, such as supply voltage, ground voltage, underlayer voltage etc., and then affect the output of other sound channel signals, cause the stereo audio signal separating effect poor.
Summary of the invention
The purpose of the embodiment of the present invention is to provide a kind of stereo audio signal split circuit and audio frequency apparatus, is intended to solve because existing stereo audio signal split circuit adopts identical clock circuit, causes the problem that the stereo audio signal separating degree is lower.
The embodiment of the present invention is achieved in that a kind of stereo audio signal split circuit, with power supply, audio signal generator, is connected, and described stereo audio signal split circuit comprises:
The stereo clock generating module that input is connected with power supply, for generation of stereo clock signal;
The clock delay module that input is connected with the output of stereo clock generating module, carry out delay process for the stereo clock signal to receiving, the output clock time delayed signal, and described clock delay module comprises a plurality of clock delay circuit; And
First input end is connected with the output of clock delay module, the audio frequency power amplifier module that the second input is connected with the input of audio signal generator, for the clock delay signal according to the output of clock delay module, the stereo audio signal from described audio signal generator output received is modulated, wherein, described audio frequency power amplifier module comprises a plurality of audio-frequency power amplifiers, the respectively corresponding described a plurality of clock delay circuit of described a plurality of audio-frequency power amplifier, the clock signal of the concrete output of the clock delay circuit based on corresponding respectively, same stereo audio signal to described audio signal generator output is modulated.
Another purpose of the embodiment of the present invention is to provide a kind of audio frequency apparatus that comprises above-mentioned stereo audio signal split circuit.
In embodiments of the present invention, by the clock delay module, the stereo clock signal from stereo clock generating module output received is carried out to delay process, the output clock time delayed signal, audio frequency power amplifier module is according to this clock delay signal, the stereo audio signal from audio signal generator output received is modulated, thereby improved the stereo audio signal separating degree, strengthened the third dimension of sound.
The accompanying drawing explanation
Fig. 1 is the module map of the stereo audio signal split circuit that provides of first embodiment of the invention;
Fig. 2 is the circuit structure diagram of the stereo audio signal split circuit that provides of second embodiment of the invention.
Embodiment
In order to make purpose 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.
Fig. 1 shows the module map of the stereo audio signal split circuit that first embodiment of the invention provides, and for convenience of explanation, only shows part related to the present invention, and details are as follows.
The stereo audio signal split circuit comprises:
Stereo clock generating module 101, clock delay module 102 and audio frequency power amplifier module 103.
The stereo clock generating module 101 that input is connected with power supply, for generation of stereo clock signal;
The clock delay module 102 that input is connected with the output of stereo clock generating module, carry out delay process for the stereo clock signal to receiving, the output clock time delayed signal; And
First input end is connected with the output of clock delay module, the audio frequency power amplifier module 103 that the second input is connected with the input of audio signal generator, for the clock delay signal according to the output of clock delay module, the stereo audio signal from audio signal generator output received is modulated.
As one embodiment of the invention, clock delay module 102 comprises a plurality of clock delay circuit, the input that the input of first clock delay circuit in the plurality of clock delay circuit is clock delay module 102, the input of the subsequent clock delay circuit of this first clock delay circuit is connected with the input of this first clock delay circuit simultaneously, and each clock delay circuit produces the different clock signal of delay time, the individual phase place of clock delay signal lag T/ (2N) that the previous clock delay circuit that the clock delay signal that a rear clock delay circuit produces is more adjacent than it produces, wherein, T is a clock cycle, the number that N is this clock delay circuit.
As one embodiment of the invention, audio frequency power amplifier module 103 comprises a plurality of audio-frequency power amplifiers, a plurality of clock delay circuit in the corresponding clock delay module 102 of the plurality of audio-frequency power amplifier difference, the corresponding output that connects a clock delay circuit in clock delay module 102 of the first input end of each audio-frequency power amplifier, and the second input of each audio-frequency power amplifier connects the input of audio signal generator simultaneously, this audio-frequency power amplifier is the D genus audio power amplifier.
Fig. 2 shows the circuit structure diagram of the stereo audio signal split circuit that second embodiment of the invention provides, and for convenience of explanation, only shows the part relevant to the embodiment of the present invention, and details are as follows.
As one embodiment of the invention, clock delay module 102 comprises: the first clock delay circuit 1021 and second clock delay circuit 1022.
The input that the input of the first clock delay circuit 1021 is clock delay module 102, the input of the first clock delay circuit 1021 is connected with the input of two clock delay circuit 1022.The first clock delay circuit 1021 comprises inverter INV1, resistance R 1 and capacitor C 1, the input that the input of inverter INV1 is the first clock delay circuit 1021, the first end of the output connecting resistance R1 of inverter INV1, the second end of resistance R 1 is connected with the first end of capacitor C 1, the output that the first end of capacitor C 1 is the first clock delay circuit 1021, the second end ground connection of capacitor C 1.
Second clock delay circuit 1022 comprises inverter INV2, inverter INV3, inverter INV4, inverter INV5, inverter INV6, inverter INV7, inverter INV8, metal-oxide-semiconductor M1, metal-oxide-semiconductor M2, metal-oxide-semiconductor M3, metal-oxide-semiconductor M4, resistance R 2 and capacitor C 2, the input that the input of inverter INV2 is second clock delay circuit 1022, the output of inverter INV2 is connected with the input of inverter INV3, the output of inverter INV3 is connected with the input of inverter INV4, the grid of metal-oxide-semiconductor M1 connects the output of inverter INV3, the source electrode of metal-oxide-semiconductor M1 and the equal ground connection of drain electrode, the output of inverter INV4 is connected with the input of inverter INV5, the grid of metal-oxide-semiconductor M2 connects the output of inverter INV4, the source electrode of metal-oxide-semiconductor M2 and the equal ground connection of drain electrode, the output of inverter INV5 is connected with the input of inverter INV6, the grid of metal-oxide-semiconductor M3 connects the output of inverter INV5, the source electrode of metal-oxide-semiconductor M3 and the equal ground connection of drain electrode, the output of inverter INV6 is connected with the input of inverter INV7, the grid of metal-oxide-semiconductor M4 connects the output of inverter INV6, the source electrode of metal-oxide-semiconductor M4 and the equal ground connection of drain electrode, the output of inverter INV7 is connected with the input of inverter INV8, the output of inverter INV8 is connected with the first end of resistance R 2, the second end of resistance R 2 is connected with the first end of capacitor C 2, the output that the first end of capacitor C 2 is second clock delay circuit 1022, the second end ground connection of capacitor C 2.
As one embodiment of the invention, audio frequency power amplifier module 103 comprises the first audio-frequency power amplifier 1031 and the second audio-frequency power amplifier 1032, the first input end of the first audio-frequency power amplifier 1031 is connected with the output of the first clock delay circuit 1021, the second input of the first audio-frequency power amplifier 1031 is connected with the output of audio signal generator, the first input end of the second audio-frequency power amplifier 1032 is connected with the output of second clock delay circuit 1022, the second input of the second audio-frequency power amplifier 1032 is connected with the output of audio signal generator.
The operation principle of stereo audio signal split circuit is:
After connecting DC power supply, produce stereo clock signal by stereo clock generating module 101, this stereo clock signal inputs to respectively in the first clock delay circuit 1021 and second clock delay circuit 1022, and the low pass filter be comprised of resistance R 1 and capacitor C 1 connect after driving by the inverter INV1 in the first clock delay circuit 1021 is realized time delay.By inverter INV2, INV3 in second clock delay circuit 1022, INV4, INV5, INV6, INV7, INV8, metal-oxide-semiconductor M1, metal-oxide-semiconductor M2, metal-oxide-semiconductor M3, metal-oxide-semiconductor M4, add that the low pass filter be comprised of the second resistance R 2 and capacitor C 2 realizes time delay.Two clock delay circuit carry out respectively time delay to the clock signal of stereo clock generating module 101, and second clock delay circuit 1022 is with respect to first 1/4 clock cycle of clock delay circuit 1021 time delay.In the first clock delay circuit 1021 output time delayed signal to the first audio-frequency power amplifiers 1031, in second clock delay circuit 1022 output time delayed signal to the second audio-frequency power amplifiers 1032, thereby the audio signal in audio power amplifier circuit is separately modulated.
Another embodiment of the present invention also provides a kind of audio frequency apparatus that comprises above-mentioned stereo audio signal split circuit.
In inventive embodiments, the stereo audio signal split circuit comprises stereo clock generating module 101, clock delay module 102 and audio frequency power amplifier module 103, the stereo clock signal from stereo clock generating module 101 outputs that 102 pairs of clock delay modules receive is carried out delay process, the output clock time delayed signal, audio frequency power amplifier module 103 is according to this clock delay signal, the stereo audio signal from audio signal generator output received is modulated, thereby improved the stereo audio signal separating degree, strengthened the third dimension of sound.
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 (8)
1. a stereo audio signal split circuit, be connected with power supply, audio signal generator, it is characterized in that, described stereo audio signal split circuit comprises:
The stereo clock generating module that input is connected with power supply, for generation of stereo clock signal;
The clock delay module that input is connected with the output of stereo clock generating module, carry out delay process for the stereo clock signal to receiving, the output clock time delayed signal, and described clock delay module comprises a plurality of clock delay circuit; And
First input end is connected with the output of clock delay module, the audio frequency power amplifier module that the second input is connected with the input of audio signal generator, for the clock delay signal according to the output of clock delay module, the stereo audio signal from described audio signal generator output received is modulated, wherein, described audio frequency power amplifier module comprises a plurality of audio-frequency power amplifiers, the respectively corresponding described a plurality of clock delay circuit of described a plurality of audio-frequency power amplifier, the clock signal of the concrete output of the clock delay circuit based on corresponding respectively, same stereo audio signal to described audio signal generator output is modulated.
2. stereo audio signal split circuit as claimed in claim 1, it is characterized in that, the input that the input of first clock delay circuit in described a plurality of clock delay circuit is described clock delay module, the input of the subsequent clock delay circuit of described first clock delay circuit is connected with the input of described first clock delay circuit simultaneously, and each clock delay circuit produces the different clock signal of delay time, the individual phase place of clock delay signal lag T/ (2N) that the previous clock delay circuit that the clock delay signal that a rear clock delay circuit produces is more adjacent than it produces, described T is a clock cycle, the number that N is described clock delay circuit.
3. stereo audio signal split circuit as claimed in claim 2, it is characterized in that, the corresponding output that connects a clock delay circuit in described clock delay module of the first input end of each audio-frequency power amplifier, the second input of described each audio-frequency power amplifier connects the input of audio signal generator simultaneously.
4. stereo audio signal split circuit as claimed in claim 3, is characterized in that, described audio-frequency power amplifier is the D genus audio power amplifier.
5. an audio frequency apparatus, comprise power supply and audio signal generator, it is characterized in that, described audio frequency apparatus comprises the stereo audio signal split circuit, and described stereo audio signal split circuit comprises:
The stereo clock generating module that input is connected with power supply, for generation of stereo clock signal;
The clock delay module that input is connected with the output of stereo clock generating module, carry out delay process for the stereo clock signal to receiving, the output clock time delayed signal, and described clock delay module comprises a plurality of clock delay circuit; And
First input end is connected with the output of clock delay module, the audio frequency power amplifier module that the second input is connected with the input of audio signal generator, for the clock delay signal according to the output of clock delay module, the stereo audio signal from described audio signal generator output received is modulated, wherein, described audio frequency power amplifier module comprises a plurality of audio-frequency power amplifiers, the respectively corresponding described a plurality of clock delay circuit of described a plurality of audio-frequency power amplifier, the clock signal of the concrete output of the clock delay circuit based on corresponding respectively, same stereo audio signal to described audio signal generator output is modulated.
6. audio frequency apparatus as claimed in claim 5, it is characterized in that, the input that the input of first clock delay circuit in described a plurality of clock delay circuit is described clock delay module, the input of the subsequent clock delay circuit of described first clock delay circuit is connected with the input of described first clock delay circuit simultaneously, and each clock delay circuit produces the different clock signal of delay time, the individual phase place of clock delay signal lag T/ (2N) that the previous clock delay circuit that the clock delay signal that a rear clock delay circuit produces is more adjacent than it produces, described T is a clock cycle, the number that N is described clock delay circuit.
7. audio frequency apparatus as claimed in claim 6, it is characterized in that, the corresponding output that connects a clock delay circuit in described clock delay module of the first input end of each audio-frequency power amplifier, the second input of described each audio-frequency power amplifier connects the input of audio signal generator simultaneously.
8. audio frequency apparatus as claimed in claim 5, is characterized in that, described audio-frequency power amplifier is the D genus audio power amplifier.
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| CN2011101039931A CN102340723B (en) | 2011-04-25 | 2011-04-25 | Stereo audio signal separation circuit and audio equipment |
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| CN2011101039931A CN102340723B (en) | 2011-04-25 | 2011-04-25 | Stereo audio signal separation circuit and audio equipment |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201069641Y (en) * | 2007-07-26 | 2008-06-04 | 欧多尔(佛冈)数码电子制造有限公司 | Audio signal processor |
| CN101877588A (en) * | 2005-12-06 | 2010-11-03 | 罗姆股份有限公司 | Frequency modulator and the frequency modulation transtation mission circuit that uses it |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO1994016537A1 (en) * | 1990-01-09 | 1994-07-21 | Desper Products, Inc. | Stereophonic manipulation apparatus and method for sound image enhancement |
| CN2390358Y (en) * | 1999-12-27 | 2000-08-02 | 江苏新科电子集团公司 | Power amplifying device capable of outputting superheavy bass sound channel signal |
| US7490044B2 (en) * | 2004-06-08 | 2009-02-10 | Bose Corporation | Audio signal processing |
| JP3916087B2 (en) * | 2004-06-29 | 2007-05-16 | ソニー株式会社 | Pseudo-stereo device |
| KR100636250B1 (en) * | 2005-10-07 | 2006-10-19 | 삼성전자주식회사 | Method and apparatus for amplifying stereo effect |
| JP2008206136A (en) * | 2007-01-23 | 2008-09-04 | Rohm Co Ltd | Filter circuit, fm transmitter including the same, and electronic equipment using filter circuit and fm transmitter |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101877588A (en) * | 2005-12-06 | 2010-11-03 | 罗姆股份有限公司 | Frequency modulator and the frequency modulation transtation mission circuit that uses it |
| CN201069641Y (en) * | 2007-07-26 | 2008-06-04 | 欧多尔(佛冈)数码电子制造有限公司 | Audio signal processor |
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