CN106792358A - Audio control system and audio system - Google Patents
Audio control system and audio system Download PDFInfo
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- CN106792358A CN106792358A CN201710011122.4A CN201710011122A CN106792358A CN 106792358 A CN106792358 A CN 106792358A CN 201710011122 A CN201710011122 A CN 201710011122A CN 106792358 A CN106792358 A CN 106792358A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2420/00—Details of connection covered by H04R, not provided for in its groups
- H04R2420/03—Connection circuits to selectively connect loudspeakers or headphones to amplifiers
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
- Amplifiers (AREA)
Abstract
A kind of audio control system and audio system.Wherein, audio process, is adapted to provide for audio control signal, the first audio signal and the second audio signal；Voice-frequency channel select unit, it is suitable to export the first control signal to Audio power amplifier unit, the second control signal of output to analog switch unit according to audio control signal, the first audio signal is sent to Audio power amplifier unit when the first control signal is open signal, sends to analog switch unit the first audio signal and the second audio signal when the second control signal is open signal；Audio power amplifier unit, is suitable to be exported to the output end of Audio power amplifier unit after when the first control signal for receiving is open signal, the first audio signal is amplified；Analog switch unit, is suitable to export to the output end of analog switch unit the first audio signal and the second audio signal when the second control signal for receiving is open signal.
Description
Technical field
The present invention relates to electronic applications, more particularly to a kind of audio control system and audio system.
Background technology
The integrated function of smart mobile phone is more and more, social as collection communication, audio-visual amusement, and Domestic News are in the individual of one
People multimedia terminal.In terms of voice applications, user plays to music, video, radio, broadband voice, the side such as high definition voice
The requirement in face also more and more higher, each cell phone manufacturer is increasingly competitive, increasingly payes attention to design in terms of audio and improves, confusingly
The confused audio scheme for releasing differentiation.There is various voice applications patterns, including cell phone incoming call in smartphone audio frequency system
The tinkle of bells, listens music, the application scenarios such as FM broadcast, hand-free call is listened to, it is necessary to individually or simultaneously open in these application scenarios
Earphone path and external audio power amplifier path, and in smartphone audio frequency system, external audio power amplifier
Input sharing earphone path left and right acoustic channels, therefore, to meet various voice applications patterns, it is necessary to additionally increase control chip and
Vertical component, occupies cloth board space outward, improves design cost.
The content of the invention
The problem that the present invention is solved is the design cost for how reducing audio system.
To solve the above problems, the present invention provides a kind of audio control system, including：Audio process and audio power are put
Big device, the audio-frequency power amplifier includes voice-frequency channel select unit, Audio power amplifier unit and analog switch unit.Institute
Audio process is stated, audio control signal, the first audio signal and the second audio signal is adapted to provide for.The voice-frequency channel selection
Unit, is suitable to export the first control signal to the Audio power amplifier unit, output second according to the audio control signal
Control signal sends out first audio signal when first control signal is open signal to the analog switch unit
The Audio power amplifier unit is delivered to, when second control signal is open signal by first audio signal and the
Two audio signals are sent to the analog switch unit.The Audio power amplifier unit, is suitable in the first control for receiving
Exported to the output end of the Audio power amplifier unit after first audio signal is amplified when signal is open signal.Institute
Analog switch unit is stated, is suitable to first audio signal and second when the second control signal for receiving is open signal
Audio signal is exported to the output end of the analog switch unit.
Optionally, the audio-frequency power amplifier realized by a chip, the voice-frequency channel select unit, audio power
Amplifying unit and analog switch unit are integrated on the chip.
Optionally, in first audio signal and the second audio signal is left channel audio signal, another
It is right channel audio signal.
Optionally, the voice-frequency channel select unit includes：Pulse control unit, the first way selectors and alternate path
Selector.The pulse control unit is suitable to export first control signal according to the number of pulses of the audio control signal
With the second control signal, first way selectors are opened when first control signal is open signal, described the
Two control signals open first way selectors and alternate path selector when being open signal.The first path selection
Device, is suitable to receive first audio signal, and sends first audio signal to the audio power after unlatching and put
Big unit.The alternate path selector, is suitable to receive second audio signal, and believe second audio after unlatching
Number send to the analog switch unit.
Optionally, the analog switch unit includes the first transmission gate, the second transmission gate, first resistor, second resistance, anti-
Phase device.The phase inverter is adapted to provide for the inversion signal of second control signal.The input of first transmission gate is suitable to
First audio signal is received, the output end of first transmission gate connects the first end of the first resistor, described first
First control end of transmission gate is suitable to receive second control signal, and the second control end of first transmission gate is suitable to receive
The inversion signal of second control signal.The input of second transmission gate is suitable to receive second audio signal, institute
The output end for stating the second transmission gate connects the first end of the second resistance, and the first control end of second transmission gate is suitable to connect
Second control signal is received, the second control end of second transmission gate is suitable to receive the anti-phase letter of second control signal
Number.
Optionally, first transmission gate includes the first NMOS tube and the first PMOS, and second transmission gate includes the
Two NMOS tubes and the second PMOS.The source electrode and described first of drain electrode connection first PMOS of first NMOS tube is passed
The input of defeated door, the drain-source of first NMOS tube connects the drain electrode of first PMOS and first transmission gate
Output end, the grid of first NMOS tube connects second control signal, the grid connection institute of first PMOS
State the inversion signal of the second control signal.The source electrode of drain electrode connection the 2nd PMOS pipes of second NMOS tube and described
The input of the second transmission gate, the drain-source of second NMOS tube connects the drain electrode and described second of second PMOS
The output end of transmission gate, the grid of second NMOS tube connects second control signal, the grid of second PMOS
Connect the inversion signal of second control signal.
Optionally, the open signal is high level.
Optionally, the resistance of the first resistor and second resistance is equal.
Optionally, the resistance of the first resistor and second resistance is the Ω of 10 Ω to 12.
The embodiment of the present invention also provides a kind of audio system, including loudspeaker, receiver J-Horner and above-mentioned audio frequency control system
System, the loudspeaker connects the output end of the Audio power amplifier unit, and the receiver J-Horner connects the analog switch list
The output end of unit.
Compared with prior art, the voice-frequency channel select unit of audio-frequency power amplifier of the invention can be according to audio at
The audio control signal that reason device is provided produces the first control signal and the second control signal, and audio is controlled by the first control signal
The opening and closing of power amplification unit, by the opening and closing of the second control signal control analog switch unit, and according to
The first audio signal and the second audio signal that first control signal and the second control signal provide audio process export to
Audio power amplifier unit and analog switch unit.Because voice-frequency channel select unit has above-mentioned functions so that voice-frequency channel
Select unit, Audio power amplifier unit and analog switch unit can be integrated in an audio-frequency power amplifier, it is not necessary to
Other outer vertical components, so as to save cloth board space, reduce design cost.
Brief description of the drawings
Fig. 1 is the audio system structural representation of the embodiment of the present invention；
Fig. 2 is the analog switch unit structural representation of the embodiment of the present invention.
Specific embodiment
It is understandable to enable the above objects, features and advantages of the present invention to become apparent, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.
As shown in figure 1, the embodiment of the present invention provides a kind of audio control system, including：Audio process 1 and audio power
Amplifier 2.The audio-frequency power amplifier 2 is opened including voice-frequency channel select unit 21, Audio power amplifier unit 22 and simulation
Close unit 23.
The audio process 1 is adapted to provide for audio control signal, the first audio signal PA_IN and the second audio signal
HP_IN.The audio process 1 can export institute by universal input/output interface (general purpose IO, GPIO)
State audio control signal.
The voice-frequency channel select unit 21 is suitable to export the first control signal PA and the according to the audio control signal
Two control signal HP.The first audio signal PA_IN is sent to institute when the first control signal PA is for open signal
State Audio power amplifier unit 22.When the second control signal HP is open signal by the first audio signal PA_IN
Sent to the analog switch unit 23 with the second audio signal HP_IN.
The Audio power amplifier unit 22 is suitable to will be described when the first control signal PA for receiving is open signal
First audio signal PA_IN is exported to the output end of the Audio power amplifier unit 22 after amplifying.
The analog switch unit 23 is suitable to described first when the second control signal HP for receiving is open signal
Audio signal PA_IN and the second audio signal HP_IN are exported to the output end of the analog switch unit 23.
In the present embodiment, the voice-frequency channel select unit 21 of audio-frequency power amplifier 2 can be carried according to audio process 1
The audio control signal of confession produces the first control signal PA and the second control signal HP, and audio is controlled by the first control signal PA
The opening and closing of power amplification unit 22, the opening and closing of analog switch unit 23 are controlled by the second control signal HP,
And audio process 1 is provided the first audio signal PA_IN and according to the first control signal PA and the second control signal HP
Two audio signal HP_IN are exported to Audio power amplifier unit 22 and analog switch unit 23.Due to voice-frequency channel select unit
21 have above-mentioned functions so that voice-frequency channel select unit 21, Audio power amplifier unit 22 and analog switch unit 23 can be with
It is integrated in an audio-frequency power amplifier 2, it is not necessary to other outer vertical components, so as to save cloth board space, reduces and set
Meter cost.
One in the first audio signal PA_IN and the second audio signal HP_IN of the present embodiment can be left sound
Audio channel signal, another is right channel audio signal.For example, the first audio signal PA_IN is left channel audio signal, second
Audio signal HP_IN is right channel audio signal.Audio process 1 exports the first audio signal by L channel output end HP_L
PA_IN, the second audio signal HP_IN is exported by right L channel output end HP_R.
With continued reference to Fig. 1, the voice-frequency channel select unit 21 can include：Pulse control unit 211, the choosing of the first path
Select device 212 and alternate path selector 213.
The pulse control unit 211 is suitable to according to the number of pulses of audio control signal output first control
Signal PA and the second control signal HP.First way selectors are opened when the first control signal PA is open signal
212, open first way selectors and alternate path selector when the second control signal HP is open signal
213。
First way selectors 212 are suitable to receive the first audio signal PA_IN, and by described the after unlatching
One audio signal PA_IN is sent to the Audio power amplifier unit 22.
The alternate path selector 213 is suitable to receive the second audio signal HP_IN, and by described the after unlatching
Two audio signal HP_IN are sent to the analog switch unit 23.
Specifically, pulse control unit 211 calculates the number of pulses of audio control signal, judged by number of pulses
Into which kind of voice applications pattern.The voice applications pattern can include cell phone incoming call the tinkle of bells, listen music, listen to FM broadcast,
Hand-free call etc..
When pulse control unit 211 judges to enter cell phone incoming call ring tone modes according to number of pulses, the first control of generation
Signal PA processed and the second control signal HP are open signal.Audio power amplifier unit 22 and analog switch unit 23 are received
Enter opening after open signal.Also, pulse control unit 211 also opens the first way selectors 212 and second
Way selectors 213, the first way selectors 212 send to the He of Audio power amplifier unit 22 first audio signal PA_IN
Analog switch unit 23, alternate path selector 213 sends to analog switch unit 23 second audio signal HP_IN.So
It is achieved that the pattern that loudspeaker and earphone are opened simultaneously.
Listening music pattern can individually open loudspeaker or earphone, it is assumed that pulse control unit 211 is sentenced according to number of pulses
When disconnected entrance earphone listens music pattern, the first control signal PA of generation is shutdown signal, and the second control signal HP is out
Open signal.Audio power amplifier unit 22 enters close pattern after receiving shutdown signal, and analog switch unit 23 receives unlatching
Enter opening after signal.Also, pulse control unit 211 also opens the first way selectors 212 and alternate path choosing
Device 213 is selected, the first audio signal PA_IN is sent to Audio power amplifier unit 22 and simulation and opened by the first way selectors 212
Unit 23 is closed, alternate path selector 213 sends to analog switch unit 23 second audio signal HP_IN.However, due to sound
Frequency power amplification unit 22 is in close pattern, so Audio power amplifier unit 22 will not export the first audio signal PA_
IN, and it is in the output of the analog switch unit 23 first audio signal PA_IN and the second audio signal HP_IN of open mode.
When listening to FM broadcast, if listen to FM with loudspeaker broadcasting, earphone is needed to work as antenna, but do not need earphone sound
Sound.So, when pulse control unit 211 judges to listen to FM broadcast modes into loudspeaker according to number of pulses, the of generation
One control signal PA is open signal, and the second control signal HP is shutdown signal.Audio power amplifier unit 22 is received out
Enter open mode after opening signal, analog switch unit 23 enters closed mode after receiving shutdown signal.Also, Pulse Width Control
Unit 211 also opens the first way selectors 212, but closes alternate path selector 213.First way selectors 212 will
First audio signal PA_IN is sent to Audio power amplifier unit 22 and analog switch unit 23, and alternate path selector 213 is then
It is stopped.Because analog switch unit 23 is in close pattern, so analog switch unit 23 will not export the first audio letter
Number PA_IN, and the Audio power amplifier unit 22 for being in open mode exports the first audio signal PA_IN.
In order to can be with integrated with voice-frequency channel select unit 21 and Audio power amplifier unit 22 by analog switch unit 23
On the same chip, as shown in Fig. 2 the analog switch unit 23 of the present embodiment can include the first transmission gate 231, the
Two transmission gates 232, first resistor R1, second resistance R2, phase inverter (not shown).
The phase inverter is adapted to provide for the inversion signal HPN of the second control signal HP.
The input of first transmission gate 231 is suitable to receive the first audio signal PA_IN, first transmission gate
231 output end connects the first end of the first resistor R1, and the first control end of first transmission gate 231 is suitable to receive institute
The second control signal HP is stated, the second control end of first transmission gate 231 is suitable to receive the anti-phase of second control signal
Signal HPN.
The input of second transmission gate 232 is suitable to receive the second audio signal HP_IN, second transmission gate
232 output end connects the first end of the second resistance R2, and the first control end of second transmission gate 232 is suitable to receive institute
The second control signal HP is stated, the second control end of second transmission gate 232 is suitable to receive the anti-phase of second control signal
Signal HPN.
Wherein, first transmission gate 231 includes the first NMOS tube N0 and the first PMOS P0, second transmission gate
232 include the second NMOS tube N1 and the second PMOS P1.
The source electrode and first transmission gate 231 of drain electrode connection the first PMOS P0 of the first NMOS tube N0
Input, the drain-source of the first NMOS tube N0 connects the drain electrode of the first PMOS P0 and first transmission gate
231 output end, the grid of the first NMOS tube N0 connects the second control signal HP, the grid of first PMOS
Connect the inversion signal HPN of second control signal.
The source electrode of drain electrode connection the second PMOS P1 of the second NMOS tube N1 and second transmission gate 232
Input, the drain-source of the second NMOS tube N1 connects the drain electrode of the second PMOS P1 and second transmission gate
232 output end, the grid of the second NMOS tube N1 connects the second control signal HP, the grid of the second PMOS P1
Pole connects the inversion signal HPN of second control signal.
The open signal of the first control signal PA can be high level, and shutdown signal is low level.Second control
The open signal of signal HP processed can be high level, and shutdown signal is low level.When the second control signal HP is high level, the
The inversion signal HPN of two control signals is low level, and the first transmission gate 231 and the second transmission gate 232 are in conducting state, the
One audio signal PA_IN and the second audio signal HP_IN are exported by the first transmission gate 231 and the second transmission gate 232 respectively.
The first resistor R1 and second resistance R2 of the present embodiment can limit the first audio signal PA_IN and the second audio letter
The amplitude of number HP_IN, plays amplitude limit purpose.First resistor R1 and second resistance R2 resistances can be with equal.Specifically, first resistor
The resistance of R1 and second resistance R2 is the Ω of 10 Ω to 12.
Please continue to refer to Fig. 1, the present embodiment also provides a kind of audio system, including loudspeaker (shown in figure and do not marked), ear
The audio control system that the machine transplanting of rice mouthful (shown in figure and do not marked) and above-described embodiment are provided.Wherein, loudspeaker connects the audio work(
The output end of rate amplifying unit 22, receiver J-Horner connects the output end of the analog switch unit 23.
Although present disclosure is as above, the present invention is not limited to this.Any those skilled in the art, are not departing from this
In the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
The scope of restriction is defined.
Claims (10)
1. a kind of audio control system, it is characterised in that including：Audio process and audio-frequency power amplifier, the audio work(
Rate amplifier includes voice-frequency channel select unit, Audio power amplifier unit and analog switch unit；
The audio process, is adapted to provide for audio control signal, the first audio signal and the second audio signal；
The voice-frequency channel select unit, is suitable to export the first control signal to the audio work(according to the audio control signal
Rate amplifying unit, the second control signal of output to the analog switch unit, when first control signal is open signal
First audio signal is sent to the Audio power amplifier unit, will when second control signal is open signal
First audio signal and the second audio signal are sent to the analog switch unit；
The Audio power amplifier unit, is suitable to first audio when the first control signal for receiving is open signal
Signal is exported to the output end of the Audio power amplifier unit after amplifying；
The analog switch unit, is suitable to first audio signal when the second control signal for receiving is open signal
Exported with the second audio signal to the output end of the analog switch unit.
2. audio control system as claimed in claim 1, it is characterised in that the audio-frequency power amplifier is by a chip reality
Existing, the voice-frequency channel select unit, Audio power amplifier unit and analog switch unit are integrated on the chip.
3. audio control system as claimed in claim 1, it is characterised in that first audio signal and the second audio signal
In one be left channel audio signal, another is right channel audio signal.
4. audio control system as claimed in claim 1, it is characterised in that the voice-frequency channel select unit includes：Pulse
Control unit, the first way selectors and alternate path selector；
The pulse control unit be suitable to according to the number of pulses of the audio control signal export first control signal and
Second control signal, opens first way selectors, described second when first control signal is open signal
Control signal opens first way selectors and alternate path selector when being open signal；
First way selectors, are suitable to receive first audio signal, and by first audio signal after unlatching
Send to the Audio power amplifier unit；
The alternate path selector, is suitable to receive second audio signal, and by second audio signal after unlatching
Send to the analog switch unit.
5. audio control system as claimed in claim 1, it is characterised in that the analog switch unit includes the first transmission
Door, the second transmission gate, first resistor, second resistance, phase inverter；
The phase inverter is adapted to provide for the inversion signal of second control signal；
The input of first transmission gate is suitable to receive first audio signal, the output end connection of first transmission gate
The first end of the first resistor, the first control end of first transmission gate is suitable to receive second control signal, described
Second control end of the first transmission gate is suitable to receive the inversion signal of second control signal；
The input of second transmission gate is suitable to receive second audio signal, the output end connection of second transmission gate
The first end of the second resistance, the first control end of second transmission gate is suitable to receive second control signal, described
Second control end of the second transmission gate is suitable to receive the inversion signal of second control signal.
6. audio control system as claimed in claim 4, it is characterised in that first transmission gate include the first NMOS tube and
First PMOS, second transmission gate includes the second NMOS tube and the second PMOS；
The source electrode and the input of first transmission gate of drain electrode connection first PMOS of first NMOS tube, it is described
The drain-source of the first NMOS tube connects drain electrode and the output end of first transmission gate of first PMOS, described first
The grid of NMOS tube connects second control signal, and the grid of first PMOS connects the anti-of second control signal
Phase signals；
The source electrode and the input of second transmission gate of drain electrode connection second PMOS of second NMOS tube, it is described
The drain-source of the second NMOS tube connects drain electrode and the output end of second transmission gate of second PMOS, described second
The grid of NMOS tube connects second control signal, and the grid of second PMOS connects the anti-of second control signal
Phase signals.
7. audio control system as claimed in claim 4, it is characterised in that the open signal is high level.
8. audio control system as claimed in claim 4, it is characterised in that the resistance phase of the first resistor and second resistance
Deng.
9. audio control system as claimed in claim 6, it is characterised in that the resistance of the first resistor and second resistance is equal
It is the Ω of 10 Ω to 12.
10. a kind of audio system, it is characterised in that including loudspeaker, receiver J-Horner and claim 1-9 any claims institute
The audio control system stated, the loudspeaker connects the output end of the Audio power amplifier unit, the receiver J-Horner connection
The output end of the analog switch unit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710011122.4A CN106792358B (en) | 2017-01-06 | 2017-01-06 | Audio control system and audio system |
| CN202010053159.5A CN111294702B (en) | 2017-01-06 | 2017-01-06 | Audio control system and audio system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710011122.4A CN106792358B (en) | 2017-01-06 | 2017-01-06 | Audio control system and audio system |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010053159.5A Division CN111294702B (en) | 2017-01-06 | 2017-01-06 | Audio control system and audio system |
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| Publication Number | Publication Date |
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| CN106792358A true CN106792358A (en) | 2017-05-31 |
| CN106792358B CN106792358B (en) | 2020-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010053159.5A Active CN111294702B (en) | 2017-01-06 | 2017-01-06 | Audio control system and audio system |
| CN201710011122.4A Active CN106792358B (en) | 2017-01-06 | 2017-01-06 | Audio control system and audio system |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010053159.5A Active CN111294702B (en) | 2017-01-06 | 2017-01-06 | Audio control system and audio system |
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| CN112965684A (en) * | 2019-12-12 | 2021-06-15 | 成都鼎桥通信技术有限公司 | Audio output control method and device |
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Also Published As
| Publication number | Publication date |
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| CN106792358B (en) | 2020-12-11 |
| CN111294702B (en) | 2021-12-21 |
| CN111294702A (en) | 2020-06-16 |
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