CN209462588U - A kind of shutdown noise absorber and earphone, speaker - Google Patents
A kind of shutdown noise absorber and earphone, speaker Download PDFInfo
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- CN209462588U CN209462588U CN201920350498.2U CN201920350498U CN209462588U CN 209462588 U CN209462588 U CN 209462588U CN 201920350498 U CN201920350498 U CN 201920350498U CN 209462588 U CN209462588 U CN 209462588U
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Abstract
The utility model belongs to electronic technology field, discloses a kind of shutdown noise absorber and earphone, speaker, including power module, key module, logic module, control module, audio-frequency module and switch module；Power module generates power supply according to DC power supply to be powered to each functional module；Key module inputs according to user and generates push button signalling；Logic module generates trigger signal according to push button signalling, and generates switching signal after generating trigger signal preset time；Control module generates control signal according to trigger signal；Audio-frequency module is played out according to power supply and the original audio signal of input, and stops playing according to control signal；Switch module disconnects DC power supply so that power module stops working according to switching signal；So as to avoid the noise that the moment audio-frequency module that shutdown is cut off the power generates, to improve the effect of earphone or speaker.
Description
Technical field
The utility model belongs to electronic technology field more particularly to a kind of shutdown noise absorber and earphone, speaker.
Background technique
Traditional earphone or speaker includes power module, key module, control module, switch module and audio-frequency module.
Power supply is generated to be powered to each functional module according to the DC power supply of input for power module；Key module root
It is inputted according to user and generates push button signalling；Control module generates switching signal according to the push button signalling；Switch module is according to key
Signal turns off DC power supply；Audio-frequency module is played out according to the original audio signal of the power supply and input.
However, the moment audio-frequency module that shutdown is cut off the power can generate noise, so that the noise of earphone or speaker is larger.
Therefore the moment audio-frequency module that traditional earphone or speaker are cut off the power in the presence of shutdown can generate noise, so as to cause ground
The biggish defect of the noise of earphone or speaker.
Utility model content
The utility model provides a kind of shutdown noise absorber and earphone, speaker, it is intended to solve traditional earphone and
The moment audio-frequency module that the existing shutdown of speaker is cut off the power can generate noise, and the noise so as to cause ground earphone or speaker is larger
The problem of.
The utility model is realized in this way a kind of shutdown noise absorber, the shutdown noise absorber include:
For generating power module of the power supply to be powered to each functional module according to the DC power supply of input；
For inputting the key module for generating push button signalling according to user；
It is connect with the key module, for generating trigger signal according to the push button signalling, and is generating the triggering
The logic module of switching signal is generated after signal preset time；
It is connect with the logic module and the power module, for generating the control of control signal according to the trigger signal
Molding block；
It is connect with the control module and the power module, for the original audio according to the power supply and input
Signal plays out, and stops the audio-frequency module playing according to the control signal；
It is connect with the power module and the audio-frequency module, for disconnecting the DC power supply according to the switching signal
So that the switch module that the power module stops working.
The audio-frequency module includes: in one of the embodiments,
For forwarding the audio interface unit of original audio signal；
For acquiring the sound collection unit of environmental sound signal；
It is connect with the control module, the audio interface unit and the sound collection unit, according to the ambient sound
Sound signal carries out noise reduction process to the original audio signal to generate target audio signal, and is stopped according to the control signal
The only noise reduction unit of the generation of the target audio signal；
It is connect with the noise reduction module, the audio playing unit played out according to the target audio signal.
The noise reduction unit includes noise reduction chip, the first magnetic bead, first capacitor, the first electricity in one of the embodiments,
Resistance, second resistance, 3rd resistor and the 4th resistance；
The logic power end of the noise reduction chip and the first end of first magnetic bead and the first end of the first capacitor
Connection, the common structure of second end of the second end of first magnetic bead, the first end and the second resistance of the first resistor
At the power input of the noise reduction unit, the clock end of the noise reduction chip is connect with the first end of the 3rd resistor, institute
The data terminal for stating noise reduction chip is connect with the first end of the 4th resistance, the second end of the first resistor, second electricity
The second end of the second end of resistance, the second end of the 3rd resistor and the 4th resistance collectively forms the noise reduction unit
Control signal input, the positive tone frequency channel wire signal end of the noise reduction chip and the cathode tone frequency channel wire signal end of the noise reduction chip
Collectively form the original audio signal input terminal of the noise reduction unit, the positive Mike's input terminal of the first of the noise reduction chip, institute
State the first cathode Mike input terminal of noise reduction chip, second positive Mike's input terminal of the noise reduction chip and the noise reduction core
Second cathode Mike's input terminal of piece collectively forms the environmental sound signal input terminal of the noise reduction unit, the noise reduction chip
The cathode audio signal output end of positive audio signal output end and the noise reduction chip collectively forms the mesh of the noise reduction unit
Mark audio signal output end.
The control module includes first microprocessor in one of the embodiments,；
The power end of the first microprocessor is the power input of the control module, the first microprocessor
First data input/output terminal is the trigger signal input terminal of the control module, and the second data of the first microprocessor are defeated
The third data input/output terminal for entering output end and the first microprocessor collectively forms the control signal of the control module
The ground terminal of output end, the first microprocessor is connect with power ground.
In one of the embodiments, the logic module include the second microprocessor, the second capacitor, the 5th resistance and
6th resistance；
The power ground of second microprocessor and the first end of second capacitor collectively form the logic module
Power input,
First data input/output terminal of second microprocessor is the push button signalling input terminal of the logic module, institute
The the second data input/output terminal for stating the second microprocessor is the switching signal output end of the logic module, second micro- place
The third data input/output terminal of reason device is connect with the first end of the 5th resistance, the second end of the 5th resistance and described
The first end of 6th resistance collectively forms the trigger signal output end of the logic module, the second end of second capacitor and institute
The second end for stating the 6th resistance is connected to power ground altogether.
The key module includes toggle switch and the 7th resistance in one of the embodiments,；
The fixing end of the toggle switch be the key module push button signalling output end, the first of the toggle switch
Switch terminal is connect with power ground, and the second switch terminal of the toggle switch is connect with the first end of the 7th resistance, and described
The second end of seven resistance is the power end of the key module.
In one of the embodiments, the switch module include the first field-effect tube, the first triode, the 7th resistance,
8th resistance and the 9th resistance；
The first end of 8th resistance be the switch module switch signal input end, the second of the 8th resistance
End is connect with the base stage of the first end of the 7th resistance and first triode, the collector of first triode and institute
The grid for stating the first field-effect tube is connected with the first end of the 9th resistance, and the drain electrode of first field-effect tube is described opens
Closing the power input of module, the source electrode of first field-effect tube is the power output end of the switch module, described first
The second end of the emitter of triode and the 7th resistance is connected to power ground altogether.
The utility model embodiment also provides a kind of earphone, and the earphone includes such as above-mentioned shutdown noise absorber.
The utility model embodiment also provides a kind of speaker, and the speaker includes such as above-mentioned shutdown noise absorber.
The utility model embodiment due to first passing through control signal when shutdown by making audio-frequency module stop playing, then pre-
If turning off power supply after the time, so as to avoid the noise that the moment audio-frequency module that shutdown is cut off the power generates, to improve
The effect of earphone or speaker.
Detailed description of the invention
It is novel in order to illustrate more clearly of the technical application in the utility model embodiment, it below will be in embodiment description
Required attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only the one of the utility model
A little embodiments for those of ordinary skill in the art without creative efforts, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is a kind of function structure chart of shutdown noise absorber provided by the embodiment of the utility model；
Fig. 2 is a kind of function structure chart of shutdown noise absorber audio-frequency module provided by the embodiment of the utility model；
Fig. 3 is the exemplary circuit structure chart of shutdown noise absorber provided by the embodiment of the utility model.
Specific embodiment
It is practical new to this below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer
Type embodiment is described in further detail.
Fig. 1 shows the modular structure of shutdown noise absorber provided by the embodiment of the utility model, for the ease of saying
It is bright, part relevant to the utility model embodiment is illustrated only, details are as follows:
Above-mentioned shutdown noise absorber include power module 01, key module 02, logic module 03, control module 04,
Audio-frequency module 05 and switch module 06.
Power module 01 is used to generate power supply according to the DC power supply of input to be powered each functional module；
Key module 02, which is used to be inputted according to user, generates push button signalling；Logic module 03 is connect with key module 02, is pressed for basis
Key signals generate trigger signal, and generate switching signal after generating trigger signal preset time；Control module 04 and logic mould
Block 03 and power module 01 connect, for generating control signal according to trigger signal；Audio-frequency module 05 and control module 04 and electricity
Source module 01 connects, and stops for being played out according to power supply and the original audio signal of input, and according to control signal
Only play；Switch module 06 is connect with power module 01 and audio-frequency module 05, for according to switching signal disconnect DC power supply with
Power module 01 is set to stop working.
As shown in Fig. 2, audio-frequency module 05 include audio interface unit 051, sound collection unit 052, noise reduction unit 053 with
And audio playing unit 054.
Audio interface unit 051 forwards original audio signal；Sound collection unit 052 is for acquiring environmental sound signal；
Noise reduction unit 053 is connect with control module 04, audio interface unit 051 and sound collection unit 052, according to environmental sound signal
Noise reduction process is carried out to original audio signal to generate target audio signal, and target audio signal is stopped according to control signal
Generation；Audio playing unit 054 is connect with noise reduction module, is played out according to target audio signal.
Stop the generation of target audio signal by control signal, and turn off DC power supply after preset time, to keep away
The noise that the moment audio-frequency module that shutdown is cut off the power generates is exempted from, to improve the effect of earphone or speaker.
Fig. 3 shows the exemplary circuit structure of shutdown noise absorber provided by the embodiment of the utility model, in order to just
In explanation, part relevant to the utility model embodiment is illustrated only, details are as follows:
Noise reduction unit 053 includes noise reduction chip U1, the first magnetic bead B1, first capacitor C1, first resistor R1, second resistance
R2,3rd resistor R3 and the 4th resistance R4.
The logic power end VL of noise reduction chip U1 is connect with the first end of the first end of the first magnetic bead B1 and first capacitor C1,
The second end of the second end of first magnetic bead B1, the first end of first resistor R1 and second resistance R2 collectively forms noise reduction unit
The clock end SCL_CCLK of 053 power input, noise reduction chip U1 is connect with the first end of 3rd resistor R3, noise reduction chip U1
Data terminal SDA_CDT1 connect with the first end of the 4th resistance R4, the second of the second end of first resistor R1, second resistance R2
The second end at end, the second end of 3rd resistor R3 and the 4th resistance R4 collectively forms the control signal input of noise reduction unit 053
End, the common structure of cathode tone frequency channel wire signal end LINEB of the positive tone frequency channel wire signal end LINEA and noise reduction chip U1 of noise reduction chip U1
At the original audio signal input terminal of noise reduction unit 053, the positive Mike's input terminal MIC1A of the first of noise reduction chip U1, noise reduction core
First cathode Mike's input terminal MIC1B of piece U1, second anode Mike's input terminal MIC2A of noise reduction chip U1 and noise reduction chip
Second cathode Mike's input terminal MIC2B of U1 collectively forms the environmental sound signal input terminal of noise reduction unit 053, noise reduction chip U1
Positive audio signal output end HPOUTA and the cathode audio signal output end HPOUTB of noise reduction chip U1 collectively form noise reduction
The target audio signal output end of unit 053.
Control module 04 includes first microprocessor U2.
The power end VDD of first microprocessor U2 is the power input of control module 04, the of first microprocessor U2
One data input/output terminal PB2 is the trigger signal input terminal of control module 04, the second data input of first microprocessor U2
The third data input/output terminal PC0 of output end PC1 and first microprocessor U2 collectively forms the control signal of control module 04
The ground terminal VSS of output end, first microprocessor U2 is connect with power ground.
Logic module 03 includes the second microprocessor U3, the second capacitor C2, the 5th resistance R5 and the 6th resistance R6.
The first end of the power ground VDD of second microprocessor U3 and the second capacitor C2 collectively form the power supply of logic module 03
Input terminal,
The first data input/output terminal PIO01 of second microprocessor U3 is the push button signalling input terminal of logic module 03,
The second data input/output terminal PIO02 of second microprocessor U3 is the switching signal output end of logic module 03, second micro- place
Reason device U3 third data input/output terminal PIO03 connect with the first end of the 5th resistance R5, the second end of the 5th resistance R5 with
The first end of 6th resistance R6 collectively forms the trigger signal output end of logic module 03, the second end and the 6th of the second capacitor C2
The second end of resistance R6 is connected to power ground altogether.
Key module 02 includes toggle switch K1 and the 7th resistance R7.
The fixing end of toggle switch K1 is the push button signalling output end of key module 02, the first switch terminal of toggle switch K1
It being connect with power ground, the second switch terminal of toggle switch K1 is connect with the first end of the 7th resistance R7, and the second of the 7th resistance R7
End is the power end of key module 02.
Switch module 06 includes the first field-effect tube M1, the first triode Q1, the 7th resistance R7, the 8th resistance R8 and the
Nine resistance R9.
The first end of 8th resistance R8 is the switch signal input end of switch module 06, the second end of the 8th resistance R8 and the
The first end of seven resistance R7 is connected with the base stage of the first triode Q1, the collector of the first triode Q1 and the first field-effect tube M1
Grid and the 9th resistance R9 first end connection, the drain electrode of the first field-effect tube M1 is the power input of switch module 06,
The source electrode of first field-effect tube M1 is the power output end of switch module 06, the emitter and the 7th resistance R7 of the first triode Q1
Second end be connected to power ground altogether.
It is described further below in conjunction with working principle to shown in Fig. 3:
Power module 01 is used to generate power supply to control module 04 and noise reduction module according to the DC power supply of input
It is powered；When toggle switch K1 is allocated to the first switch terminal by the second switch terminal, the fixing end of toggle switch K1 exports low electricity
Flat push button signalling and the first data input/output terminal PIO01 for being sent to the second microprocessor U3, the second microprocessor U3 root
Trigger signal is generated according to low level push button signalling and is exported from the third data input/output terminal PIO03 of the second microprocessor U3
To the first data input/output terminal PB2 of first microprocessor U2, and low level is generated after generating trigger signal preset time
Switching signal and export from the second data input/output terminal PIO02 of the second microprocessor U3 to the base of the first triode Q1
Pole；First microprocessor U2 according to trigger signal generates control signal and from the second data input and output of first microprocessor U2
The third data input/output terminal PC0 of end PC1 and first microprocessor U2 is exported to the clock end SCL_CCLK of noise reduction chip U1
With the data terminal SDA_CDT1 of noise reduction chip U1；Audio-frequency module 05 is connect with control module 04 and power module 01, noise reduction chip
U1 is played out according to power supply and the original audio signal of input, is broadcast upon receiving the control signal according to control signal stopping
It puts；First triode Q1 and the first field-effect tube M1 disconnects DC power supply so that power supply according to switching signal is generated after preset time
Module 01 stops working.
The utility model embodiment also provides a kind of earphone, and earphone includes such as above-mentioned shutdown noise absorber.
The utility model embodiment also provides a kind of speaker, and speaker includes such as above-mentioned shutdown noise absorber.
The utility model embodiment is by including power module, key module, logic module, control module, audio-frequency module
And switch module；Power module generates power supply according to the DC power supply of input to be powered to each functional module
's；Key module inputs according to user and generates push button signalling；Logic module generates trigger signal according to push button signalling, and is generating
Switching signal is generated after trigger signal preset time；Control module generates control signal according to trigger signal；Audio-frequency module according to
Power supply and the original audio signal of input play out, and stop playing according to control signal；Switch module is according to opening
OFF signal disconnects DC power supply so that power module stops working；Stop audio-frequency module due to first passing through control signal when shutdown
It plays, then turns off power supply after preset time, make an uproar so as to avoid what the moment audio-frequency module that shutdown is cut off the power generated
Sound, to improve the effect of earphone or speaker.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (9)
1. a kind of shutdown noise absorber, which is characterized in that the shutdown noise absorber includes:
For generating power module of the power supply to be powered to each functional module according to the DC power supply of input；
For inputting the key module for generating push button signalling according to user；
It is connect with the key module, for generating trigger signal according to the push button signalling, and is generating the trigger signal
The logic module of switching signal is generated after preset time；
It is connect with the logic module and the power module, for generating the control mould of control signal according to the trigger signal
Block；
It is connect with the control module and the power module, for the original audio signal according to the power supply and input
It plays out, and the audio-frequency module played is stopped according to the control signal；
Connect with the power module and the audio-frequency module, for disconnecting the DC power supply according to the switching signal so that
The switch module that the power module stops working.
2. shutdown noise absorber as described in claim 1, which is characterized in that the audio-frequency module includes:
For forwarding the audio interface unit of original audio signal；
For acquiring the sound collection unit of environmental sound signal；
It is connect with the control module, the audio interface unit and the sound collection unit, according to the ambient sound message
Number noise reduction process is carried out to generate target audio signal to the original audio signal, and according to control signal stopping institute
State the noise reduction unit of the generation of target audio signal；
It is connect with the noise reduction module, the audio playing unit played out according to the target audio signal.
3. as claimed in claim 2 shutdown noise absorber, which is characterized in that the noise reduction unit include noise reduction chip,
First magnetic bead, first capacitor, first resistor, second resistance, 3rd resistor and the 4th resistance；
The logic power end of the noise reduction chip is connect with the first end of the first end of first magnetic bead and the first capacitor,
The second end of the second end of first magnetic bead, the first end of the first resistor and the second resistance collectively forms described
The clock end of the power input of noise reduction unit, the noise reduction chip is connect with the first end of the 3rd resistor, the noise reduction
The data terminal of chip is connect with the first end of the 4th resistance, and the of the second end of the first resistor, the second resistance
The second end at two ends, the second end of the 3rd resistor and the 4th resistance collectively forms the control letter of the noise reduction unit
Number input terminal, the positive tone frequency channel wire signal end of the noise reduction chip and the common structure of cathode tone frequency channel wire signal end of the noise reduction chip
At the original audio signal input terminal of the noise reduction unit, the positive Mike's input terminal of the first of the noise reduction chip, the noise reduction
The of first cathode Mike input terminal of chip, second positive Mike's input terminal of the noise reduction chip and the noise reduction chip
Two cathode Mike's input terminals collectively form the environmental sound signal input terminal of the noise reduction unit, the positive sound of the noise reduction chip
The cathode audio signal output end of frequency signal output end and the noise reduction chip collectively forms the target audio of the noise reduction unit
Signal output end.
4. shutdown noise absorber as described in claim 1, which is characterized in that the control module includes the first micro process
Device；
The power end of the first microprocessor be the control module power input, the first of the first microprocessor
Data input/output terminal is the trigger signal input terminal of the control module, and the second data input of the first microprocessor is defeated
The third data input/output terminal of outlet and the first microprocessor collectively forms the control signal output of the control module
End, the ground terminal of the first microprocessor are connect with power ground.
5. shutdown noise absorber as described in claim 1, which is characterized in that the logic module includes the second micro process
Device, the second capacitor, the 5th resistance and the 6th resistance；
The power ground of second microprocessor and the first end of second capacitor collectively form the power supply of the logic module
Input terminal,
First data input/output terminal of second microprocessor is the push button signalling input terminal of the logic module, described the
Second data input/output terminal of two microprocessors is the switching signal output end of the logic module, second microprocessor
Third data input/output terminal connect with the first end of the 5th resistance, the second end and the described 6th of the 5th resistance
The first end of resistance collectively forms the trigger signal output end of the logic module, the second end of second capacitor and described
The second end of six resistance is connected to power ground altogether.
6. as described in claim 1 shutdown noise absorber, which is characterized in that the key module include toggle switch and
7th resistance；
The fixing end of the toggle switch is the push button signalling output end of the key module, the first switching of the toggle switch
End is connect with power ground, and the second switch terminal of the toggle switch is connect with the first end of the 7th resistance, the 7th electricity
The second end of resistance is the power end of the key module.
7. shutdown noise absorber as described in claim 1, which is characterized in that the switch module includes the first field-effect
Pipe, the first triode, the 7th resistance, the 8th resistance and the 9th resistance；
The first end of 8th resistance be the switch module switch signal input end, the second end of the 8th resistance with
The first end of 7th resistance is connected with the base stage of first triode, the collector of first triode and described the
The grid of one field-effect tube is connected with the first end of the 9th resistance, and the drain electrode of first field-effect tube is the switching molding
The power input of block, the source electrode of first field-effect tube are the power output end of the switch module, the one or three pole
The second end of the emitter of pipe and the 7th resistance is connected to power ground altogether.
8. a kind of earphone, which is characterized in that the earphone includes that shutdown noise as claimed in any one of claims 1 to 7 disappears
Except device.
9. a kind of speaker, which is characterized in that the speaker includes that shutdown noise as claimed in any one of claims 1 to 7 disappears
Except device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920350498.2U CN209462588U (en) | 2019-03-19 | 2019-03-19 | A kind of shutdown noise absorber and earphone, speaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920350498.2U CN209462588U (en) | 2019-03-19 | 2019-03-19 | A kind of shutdown noise absorber and earphone, speaker |
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| CN209462588U true CN209462588U (en) | 2019-10-01 |
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