CN103414071B - A kind of audio signal reception and switching device - Google Patents
A kind of audio signal reception and switching device Download PDFInfo
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- CN103414071B CN103414071B CN201310320745.1A CN201310320745A CN103414071B CN 103414071 B CN103414071 B CN 103414071B CN 201310320745 A CN201310320745 A CN 201310320745A CN 103414071 B CN103414071 B CN 103414071B
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Abstract
A kind of audio signal switching device, comprises: input interface, USB output interface；Audio signal switching device also comprises: boosting unit and signal amplifier；Wherein: described input interface is earphone interface, wherein said input interface comprises the first audio signal input pin, described first audio signal input pin is for receiving the audio signal that coupled audio signal dispensing device sends, and outputs this to the input of described boosting unit；Described USB output interface includes audio signal output pin；Described boosting unit, boosts for the audio signal inputting its input, and by its outfan by the audio signal output extremely described signal amplifier after boosting；Described signal amplifier, is connected with the outfan of described boosting unit, and is connected with the audio signal output pin of described USB output interface, the audio signal after exporting amplification；Wherein said audio signal output pin is the D+ pin in USB output interface or D pin.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to a kind of audio signal reception device and audio signal switching device.
Background technology
Along with the development of audio-frequency signal coding/decoding technique, got more and more by the electronic installation of audio interface transmission data.
Such as, electronic installation can pass through low-resistance voice coil type horn interface (such as, the ear of mobile communications device (such as, mobile phone)
Machine interface) it is connected with mobile communications device, receive the audio signal of mobile communications device output.
Owing to the output of low-resistance voice coil type horn interface is the least, in addition to the electronic installation (such as earphone) that power consumption is the least,
The electronic installation being received audio signal by low-resistance voice coil type horn interface typically requires use external power supply or built-in battery
Could normally work, add the cost of electronic installation, increase the volume of electronic installation.
Summary of the invention
The technical problem to be solved is, overcomes the deficiencies in the prior art, it is provided that the audio frequency letter of a kind of exportable amplification
Number audio signal switching device, and the audio signal reception device being connected with this switching device.
In order to solve the problems referred to above, the present invention provides a kind of audio signal switching device, comprises: input interface, and USB exports
Interface；Described audio signal switching device also comprises: boosting unit and signal amplifier；Wherein:
Described input interface is earphone interface, and wherein said input interface comprises the first audio signal input pin, described first
Audio signal input pin is for receiving the audio signal that coupled audio signal dispensing device sends, and outputs this to
The input of described boosting unit；
Described USB output interface includes audio signal output pin；
Described boosting unit, boosts for the audio signal inputting its input, and by its outfan by after boosting
Audio signal output to described signal amplifier；
Described signal amplifier, is connected with the outfan of described boosting unit, and with the audio signal of described USB output interface
Output pin is connected, the audio signal after exporting amplification；
Wherein said audio signal output pin is the D+ pin in USB output interface or D-pin.
Additionally, described boosting unit is booster transformer, described booster transformer comprises primary coil and secondary coil；
One pin of described primary coil is as input and the described first audio signal input pin of described boosting unit
It is connected, another pin ground connection of described primary coil；
At least one output pin of described secondary coil is as outfan and described rectification unit defeated of described boosting unit
Enter end to be connected, the tap ground connection of described secondary coil.
Additionally, described audio signal switching device also comprises rectification unit and filter unit, wherein:
Described rectification unit, the audio signal after the boosting inputting its input carries out rectification, and obtains after rectification
Level by the output of its outfan to the input of described filter unit；
Described filter unit, is filtered for the level inputting its input, and the DC level obtained after filtering is led to
Cross the VBUS pin of its outfan output extremely described USB output interface.
Additionally, described input interface also comprises Mike's pin；
When described audio signal output pin is the D+ pin in USB output interface, described Mike's pin and described USB
The D-pin of output interface is connected；
Described D-pin is used for receiving signal, and is exported by described Mike's pin.
Additionally, described input interface also comprises Mike's pin；
When described audio signal output pin is the D-pin in USB output interface, described Mike's pin and described USB
The D+ pin of output interface is connected；
Described D+ pin is used for receiving signal, and is exported by described Mike's pin.
Additionally, comprise at least one diode in described rectification unit, the positive pole of described diode is defeated with described rectification unit
Entering end to be connected, the negative pole of described diode is connected with the outfan of described rectification unit.
Additionally, the secondary coil of described booster transformer comprises two output pins；The input of described rectification unit comprises two
Individual input pin；
Two output pins of described secondary coil are connected with two input pins of described rectification unit respectively；
Described rectification unit comprises two diodes, the positive pole of said two diode respectively with two of described rectification unit
Input pin is connected.
Additionally, described filter unit comprises capacitor；
One end of described capacitor is connected with input or the outfan of described filter unit；
The input of described filter unit is connected with outfan.
Additionally, described first audio signal input pin comprises: left channel pin and/or R channel pin.
The present invention also provides for a kind of audio signal reception device, comprises: signal receiving module, signal transmitting module；Its feature
It is, described audio signal reception device also comprises: USB input interface；Wherein:
Described signal receiving module is connected with the audio signal input pin of described USB input interface, for by described audio frequency
Signal input pin receives audio signal；
Described signal transmitting module is connected with the signal output pin of described USB input interface, for being exported by described signal
Pin output signal；
Described audio signal input pin is a pin in D+ or D-pin, and described signal output pin is D+ or D-
Another pin in pin.
Additionally, described signal receiving module comprises: direct current signal isolated location, the first direct current biasing unit, the second direct current
Bias unit, comparator；
The input of described direct current signal isolated location is connected with described audio signal input pin, and outfan is second straight with described
Stream bias unit is connected, the DC level in the audio signal that isolation is received by described audio signal input pin,
And exported by its outfan；
The input of described second direct current biasing unit is connected with described direct current signal isolated location, outfan and described comparator
Negative pole be connected, increase direct current biasing for audio signal that its input is inputted, and increase straight by the output of its outfan
Audio signal after stream biasing；
The outfan of described first direct current biasing unit is connected with the positive pole of comparator, is used for exporting datum；
Described comparator is under the effect of the datum inputted at its positive pole and negative pole and audio signal, by its outfan
Output square wave corresponding to audio signal.
Additionally, described signal transmitting module comprises triple gate and resistance R2；
One end of described resistance R2 is connected with described signal output pin, and the other end is connected with the outfan of described triple gate；
Described triple gate is logical under the effect of the data signal inputted at its input and the control signal of its Enable Pin input
Cross its outfan output signal.
Additionally, the outfan of described comparator is connected by resistance R7 with its positive pole, and the outfan of described comparator and
Pull-up resistor R8 is connected.
Additionally, described first direct current biasing unit comprises: resistance R3, resistance R4；
One end of described resistance R3 is connected with power supply, and the other end is connected with described resistance R4；
One end of described resistance R4 is connected with the outfan of described resistance R3 and described first direct current biasing unit, another termination
Ground；
Described second direct current biasing unit comprises: resistance R5, resistance R6；
One end of described resistance R5 is connected with power supply, and the other end is connected with described resistance R6；
One end of described resistance R6 is connected with the outfan of described resistance R5 and described second direct current biasing unit, another termination
Ground；
The output voltage of described first the connect power supply of direct current biasing unit, the resistance of described resistance R3, the resistance of described resistance R4
Value respectively with the output voltage of described second the connect power supply of direct current biasing unit, the resistance of described resistance R5, described resistance R6
Resistance identical.
In sum, the above embodiment of the present invention achieves audio frequency feeding function by relatively low hardware cost, with the present invention
Audio signal switching device (such as, tone frequency channel wire or audio conversion joint) with the use of time, audio signal reception device is permissible
While receiving audio signal and sending signal, obtain electric energy, reduce the cost of audio signal reception device, reduce
The volume of audio signal reception device.
Additionally, the audio signal switching device of the present invention also comprises USB output interface, therefore can with there is USB interface merit
The audio signal reception device of energy connects, and audio signal reception device can obtain electric energy by the VBUS pin of USB interface,
And respectively using a pin in D+ pin and D-pin as audio signal input pin, another pin is as signal
Output pin uses, in order to realize both-way communication between audio signal dispensing device and audio signal reception device.
Accompanying drawing explanation
Fig. 1 is the structural representation of the audio signal switching device first embodiment of the present invention；
Fig. 2 is the structural representation of the audio signal reception device first embodiment of the present invention；
Fig. 3 is the structural representation of audio signal switching device second embodiment of the present invention；
Fig. 4 is the structural representation of audio signal switching device the 3rd embodiment of the present invention；
Fig. 5 is the structural representation of audio signal switching device the 4th embodiment of the present invention；
Fig. 6 is the structural representation of audio signal switching device the 5th embodiment of the present invention；
Fig. 7 is the structural representation of the audio signal switching device sixth embodiment of the present invention；
Fig. 8 is the structural representation of the audio signal reception device sixth embodiment of the present invention；
Fig. 9 is the structural representation of audio signal switching device the 7th embodiment of the present invention；
Figure 10 is the structural representation of audio signal switching device the 8th embodiment of the present invention；
Figure 11 is the structural representation of audio signal switching device the 9th embodiment of the present invention；
Figure 12 is the structural representation of audio signal switching device the tenth embodiment of the present invention.
Detailed description of the invention
Describe the present invention below in conjunction with drawings and Examples.
The audio signal switching device of the present invention can be that tone frequency channel wire, audio transiting wire, audio repeating are first-class.
First embodiment
Fig. 1 is the structural representation of the audio signal switching device first embodiment of the present invention；As it is shown in figure 1, this audio frequency letter
Number switching device comprises: horn interface, boosting unit (booster transformer as shown in Figure 1), rectification unit, and filtering is single
Unit, USB output interface (USB plug as shown in Figure 1)；Wherein:
Horn interface, for being connected with audio signal dispensing device (such as, mobile phone), receives audio signal dispensing device defeated
The audio signal gone out, it is possible to audio signal dispensing device output signal.
Above-mentioned horn interface can be low-resistance voice coil type horn interface (such as, earphone interface), wherein comprises: audio signal
Input pin (AUDIO pin as shown in Figure 1), Mike's pin (MIC pin as shown in Figure 1), ground wire pin
(GND pin as shown in Figure 1).
The audio signal input pin of horn interface is connected with a pin of the primary coil of booster transformer, is used for receiving sound
Frequently the audio signal that sender unit (such as, mobile phone) sends, and output this to the above-mentioned pin of primary coil；Loudspeaker
The ground wire pin ground connection of interface.
Booster transformer, comprises primary coil and secondary coil, for by (logical for the input voltage of input (primary coil)
It is often about 1V) improve the output voltage (such as, more than or equal to 5V) to outfan (secondary coil).
The primary coil of booster transformer comprises two pins, the audio signal input pin phase of pin and horn interface
Even, another pin ground connection.
The output winding of booster transformer comprises two output pins and a tap, two output pins respectively with rectification unit
Two input pins of input are connected, tap ground connection.
Rectification unit, comprises input and outfan, carries out rectification for the exchange level inputting its input, and passes through
Level after the output rectification of its outfan.
In the present embodiment, rectification unit comprises two input pins of input, an output pin of outfan；Correspondingly,
Comprising two diodes in rectification unit, the positive pole of two diodes is connected with two input pins of rectification unit respectively, and two
The negative pole of individual diode is connected with the output pin of rectification unit.
Filter unit, comprises input and outfan, is smooth direct current level for the level translation inputted by input, and
Exported by outfan.
In the present embodiment, the input of filter unit is connected with the outfan of rectification unit, the outfan of filter unit and power supply
Output pin, i.e. the VBUS pin of USB output interface is connected, and provides power supply for coupled USB device.
In the present embodiment, the input of filter unit is connected with its outfan, and comprises one end and be connected with input/outfan
The other end ground connection of capacitor C1, capacitor C1.
Comprising in USB output interface: power supply output pin (VBUS pin), audio signal output pin, signal input is drawn
Foot, ground wire pin (GND pin).
In the present embodiment, audio signal output pin is D+ pin, and signal input pin is D-pin.
In the present embodiment, audio signal output pin (D+ pin) and the audio signal input pin (AUDIO of horn interface
Pin) it is connected, for coupled USB device output audio signal.
Alternatively, signal can also be comprised between the audio signal input pin of audio signal output pin and horn interface amplify
The input of unit, i.e. signal amplification unit is connected with the audio signal input pin of horn interface, signal amplification unit defeated
Go out end to be connected with audio signal output pin (D+ pin), the audio signal after output amplification.
In the present embodiment, signal input pin (D-pin) is connected with Mike's pin (MIC pin) of horn interface, uses
In sending signal to the audio signal dispensing device being connected with horn interface.
The ground wire pin ground connection of USB output interface.
Fig. 2 is the structural representation of the audio signal reception device first embodiment of the present invention；As in figure 2 it is shown, this device bag
Contain: USB input interface (USB slot as shown in Figure 1), signal receiving module, signal transmitting module.
Comprising in USB input interface: power input pin (VBUS pin), audio signal input pin, signal output is drawn
Foot, ground wire pin (GND pin).
In the present embodiment, audio signal input pin is D+ pin, and signal output pin is D-pin.
The ground wire pin ground connection of USB input interface.
The input of signal receiving module is connected with audio signal input pin, for receiving sound by audio signal input pin
Frequently signal, and exported by its outfan.
Signal receiving module comprises: direct current signal isolated location, the first direct current biasing unit, the second direct current biasing unit,
Comparator.
In the present embodiment, direct current signal isolated location comprises capacitor C1, for isolated DC level, the one of capacitor C1
End (input of direct current signal isolated location) is connected with audio signal input pin, the other end (direct current signal isolated location
Outfan) be connected with the second direct current biasing unit.
The capacitance of capacitor C1 can be 0.1 μ F.
The outfan of the first direct current biasing unit is connected with the positive pole of comparator, for exporting datum to comparator.
In the present embodiment, the first direct current biasing unit comprises: resistance R3, resistance R4；One end of resistance R3 is connected with power supply,
The other end is connected with resistance R4；One end of resistance R4 is connected, separately with the outfan of resistance R3 and the first direct current biasing unit
One end ground connection.
The input of the second direct current biasing unit is connected with the outfan of direct current signal isolated location, and outfan is negative with comparator
The most connected, increase direct current biasing for the audio signal that its input is inputted, the minimum voltage of audio signal is promoted to 0
More than volt, and increase the audio signal after direct current biasing by the output of its outfan.
In the present embodiment, the second direct current biasing unit comprises: resistance R5, resistance R6；One end of resistance R5 is connected with power supply,
The other end is connected with resistance R6；One end of resistance R6 is straight with the input of the second direct current biasing unit, resistance R5 and second
The outfan of stream bias unit is connected, other end ground connection.
The output voltage of power supply of the first direct current biasing unit, the resistance of resistance R3, resistance R4 resistance straight with second respectively
Stream the output voltage of power supply of bias unit, the resistance of resistance R5, resistance R6 resistance identical.
In the present embodiment, the resistance of resistance R3 and resistance R5 can be 150K ohm, resistance R4 and the resistance of resistance R6
Can be 15K ohm.
As it has been described above, the outfan of the positive pole of comparator and the first direct current biasing unit is connected, the negative pole of comparator and second straight
The outfan of stream bias unit is connected, and the outfan of comparator is connected with the outfan of signal receiving module and (i.e. connects as signal
Receive the outfan of module), output square wave corresponding to audio signal.
In the present embodiment, in order to make comparator export stable signal, the outfan of comparator and its positive pole are by resistance R7
It is connected, forms loop, and the outfan of comparator and a pull-up resistor R8 are connected.
The resistance of resistance R7 can be 1.5M ohm, and the resistance of resistance R8 can be 20K ohm.
The outfan of signal transmitting module is connected with signal output pin, for output signal.
In the present embodiment, signal transmitting module comprises triple gate and resistance R2.
One end of resistance R2 is connected with the outfan of signal transmitting module, and the other end is connected with the outfan of triple gate.
By its outfan under data signal that triple gate inputs at its input and the effect of the control signal of Enable Pin input
Output signal.
Second embodiment
Fig. 3 is the structural representation of audio signal switching device second embodiment of the present invention；As it is shown on figure 3, audio signal
Switching device the second embodiment with the difference of first embodiment is:
In second embodiment of audio signal switching device, audio signal output pin (D+ pin) is defeated with booster transformer
The arbitrary output pin going out end is connected, for coupled USB device output audio signal.
Audio signal reception device the second embodiment is identical with first embodiment.
3rd embodiment
Fig. 4 is the structural representation of audio signal switching device the 3rd embodiment of the present invention；As shown in Figure 4, audio signal
Switching device the 3rd embodiment with the difference of first embodiment is:
In 3rd embodiment of audio signal switching device only by an output pin in booster transformer secondary coil with whole
The input pin of stream unit is connected, and therefore rectification unit only need to comprise an input pin, only need to comprise one in rectification unit
Diode.
It will be apparent that compared with first embodiment, use the present embodiment will lose the half electric energy of booster transformer secondary coil,
But circuit structure can be simplified, reduce hardware cost.
In the present embodiment, another output pin ground connection in booster transformer secondary coil, and booster transformer do not comprises and takes out
Head.
Audio signal reception device the 3rd embodiment is identical with first embodiment.
4th embodiment
Fig. 5 is the structural representation of audio signal switching device the 4th embodiment of the present invention；As shown in Figure 4, audio signal
Switching device the 4th embodiment with the difference of first embodiment is:
In 4th embodiment of audio signal switching device, the audio signal input pin of horn interface comprise left channel pin and
R channel pin, left channel pin and R channel pin are connected with the same pin of the primary coil of booster transformer.
Audio signal reception device the 4th embodiment is identical with first embodiment.
5th embodiment
Fig. 6 is the structural representation of audio signal switching device the 5th embodiment of the present invention；As shown in Figure 6, audio signal
Switching device the 5th embodiment with the difference of the 4th embodiment is:
In 5th embodiment, the audio signal input pin of horn interface comprises left channel pin and R channel pin, L channel
Pin is connected with the input of signal amplification unit, is used for exporting audio signal；R channel pin and the primary of booster transformer
One pin of coil is connected, and is used for exporting electric energy.
It is of course also possible to be that R channel pin is connected with the input of signal amplification unit, it is used for exporting audio signal；Zuo Sheng
Road pin is connected with a pin of the primary coil of booster transformer, is used for exporting electric energy.
Audio signal reception device the 5th embodiment is identical with first embodiment.
Sixth embodiment
Fig. 7 is the structural representation of the audio signal switching device sixth embodiment of the present invention；As it is shown in fig. 7, audio signal
Switching device sixth embodiment with the difference of first embodiment is:
Audio signal output pin is D-pin, and signal input pin is D+ pin.That is, in the present embodiment, audio signal
Output pin (D-pin) is joined directly together with the audio signal input pin (AUDIO pin) of horn interface, or by letter
Number amplifying unit is connected, for coupled USB device output audio signal；Signal input pin (D+ pin) with
Mike's pin (MIC pin) of horn interface is connected, for sending to the audio signal dispensing device being connected with horn interface
Signal.
Fig. 8 is the structural representation of the audio signal reception device sixth embodiment of the present invention；As shown in Figure 8, audio signal
Reception device sixth embodiment with the difference of first embodiment is:
Audio signal input pin is D-pin, and signal output pin is D+ pin.That is, in the present embodiment, D-pin with
The input of signal receiving module is connected, and D+ pin is connected with the input of signal transmitting module.
7th embodiment
Fig. 9 is the structural representation of audio signal switching device the 7th embodiment of the present invention；As it is shown in figure 9, audio signal
Switching device the 7th embodiment with the difference of the second embodiment is:
Audio signal output pin is D-pin, and signal input pin is D+ pin.That is, in the present embodiment, audio signal
Output pin (D-pin) is connected with arbitrary output pin of the outfan of booster transformer and is joined directly together, or is put by signal
Big unit is connected, for coupled USB device output audio signal；Signal input pin (D+ pin) and loudspeaker
Mike's pin (MIC pin) of interface is connected, for sending signal to the audio signal dispensing device being connected with horn interface.
Audio signal reception device the 7th embodiment is identical with sixth embodiment.
8th embodiment
Figure 10 is the structural representation of audio signal switching device the 8th embodiment of the present invention；As shown in Figure 10, audio frequency letter
Number switching device the 8th embodiment with the difference of the 3rd embodiment is:
Audio signal output pin is D-pin, and signal input pin is D+ pin.That is, in the present embodiment, audio signal
Output pin (D-pin) is joined directly together with the audio signal input pin (AUDIO pin) of horn interface, or by letter
Number amplifying unit is connected, for coupled USB device output audio signal；Signal input pin (D+ pin) with
Mike's pin (MIC pin) of horn interface is connected, for sending to the audio signal dispensing device being connected with horn interface
Signal.
Audio signal reception device the 8th embodiment is identical with sixth embodiment.
9th embodiment
Figure 11 is the structural representation of audio signal switching device the 9th embodiment of the present invention；As shown in figure 11, audio frequency letter
Number switching device the 9th embodiment with the difference of the 4th embodiment is:
Audio signal output pin is D-pin, and signal input pin is D+ pin.That is, in the present embodiment, audio signal
Output pin (D-pin) is joined directly together with two audio signal input pins of horn interface, or passes through signal amplification unit
It is connected, for coupled USB device output audio signal；Signal input pin (D+ pin) and horn interface
Mike's pin (MIC pin) is connected, for sending signal to the audio signal dispensing device being connected with horn interface.
Audio signal reception device the 9th embodiment is identical with sixth embodiment.
Tenth embodiment
Figure 12 is the structural representation of audio signal switching device the tenth embodiment of the present invention；As shown in figure 12, audio frequency letter
Number switching device the tenth embodiment with the difference of the 5th embodiment is:
Audio signal output pin is D-pin, and signal input pin is D+ pin.That is, in the present embodiment, audio signal
Output pin (D-pin) is joined directly together with an audio signal input pin of horn interface, or passes through signal amplification unit
It is connected, for coupled USB device output audio signal；Signal input pin (D+ pin) and horn interface
Mike's pin (MIC pin) is connected, for sending signal to the audio signal dispensing device being connected with horn interface.
Audio signal reception device the tenth embodiment is identical with sixth embodiment.
The above embodiment of the present invention achieves audio frequency feeding function by relatively low hardware cost, with the audio signal of the present invention
Switching device with the use of time, audio signal reception device can receive audio signal and sending out to audio signal dispensing device
Obtain electric energy while the number of delivering letters, reduce the cost of audio signal reception device, reduce the body of audio signal reception device
Long-pending.
Additionally, the audio signal switching device of the present invention also comprises USB output interface, therefore can with there is USB interface merit
The audio signal reception device of energy connects, and audio signal reception device can obtain electric energy by the VBUS pin of USB interface,
And respectively using a pin in D+ pin and D-pin as audio signal input pin, another pin is as signal
Output pin uses, in order to realize both-way communication between audio signal dispensing device and audio signal reception device.
Certainly, according to the ultimate principle of the present invention, the horn interface in above-described embodiment can be replaced with and there is audio signal
Input pin, Mike's pin and the other type of input interface of ground wire pin.
Additionally, above-mentioned input interface can also be fixedly connected on audio signal dispensing device.
Above-mentioned input interface can be divided into multiple plug, such as, is divided into the audio signal plug comprising audio signal input pin,
And comprise Mike's plug of Mike's pin.
Claims (15)
1. an audio signal switching device, comprises: input interface, USB output interface；It is characterized in that, described sound
Frequently signal adapting device also comprises: boosting unit and signal amplifier；Wherein:
Described input interface is earphone interface, and wherein said input interface comprises the first audio signal input pin, described first
Audio signal input pin is for receiving the audio signal that coupled audio signal dispensing device sends, and outputs this to
The input of described boosting unit；
Described USB output interface includes audio signal output pin, and audio signal is exported extremely by described audio signal output pin
Audio signal reception device；
Described boosting unit, boosts for the audio signal inputting its input, and by its outfan by after boosting
Audio signal output to described signal amplifier；
Described signal amplifier, directly the outfan with described boosting unit is connected, and with the audio frequency of described USB output interface
Signal output pin is connected, the audio signal after exporting amplification；
Wherein said audio signal output pin is the D+ pin in USB output interface or D-pin.
2. audio signal switching device as claimed in claim 1, it is characterised in that
Described boosting unit is booster transformer, and described booster transformer comprises primary coil and secondary coil；
One pin of described primary coil is as input and the described first audio signal input pin of described boosting unit
It is connected, another pin ground connection of described primary coil；
At least one output pin of described secondary coil is as outfan and the described signal amplification unit of described boosting unit
Input be connected, the tap ground connection of described secondary coil.
3. audio signal switching device as claimed in claim 1 or 2, it is characterised in that described audio signal switching dress
Rectification unit and filter unit is also comprised, wherein in putting:
Described rectification unit, the audio signal after the boosting inputting its input carries out rectification, and obtains after rectification
Level by the output of its outfan to the input of described filter unit；
Described filter unit, is filtered for the level inputting its input, and the DC level obtained after filtering is led to
Cross the VBUS pin of its outfan output extremely described USB output interface.
4. audio signal switching device as claimed in claim 1 or 2, it is characterised in that
Described input interface also comprises Mike's pin；
When described audio signal output pin is the D+ pin in USB output interface, described Mike's pin and described USB
The D-pin of output interface is connected；
Described D-pin is used for receiving signal, and is exported by described Mike's pin.
5. audio signal switching device as claimed in claim 3, it is characterised in that
Described input interface also comprises Mike's pin；
When described audio signal output pin is the D+ pin in USB output interface, described Mike's pin and described USB
The D-pin of output interface is connected；
Described D-pin is used for receiving signal, and is exported by described Mike's pin.
6. audio signal switching device as claimed in claim 1 or 2, it is characterised in that
Described input interface also comprises Mike's pin；
When described audio signal output pin is the D-pin in USB output interface, described Mike's pin and described USB
The D+ pin of output interface is connected；
Described D+ pin is used for receiving signal, and is exported by described Mike's pin.
7. audio signal switching device as claimed in claim 3, it is characterised in that
Described input interface also comprises Mike's pin；
When described audio signal output pin is the D-pin in USB output interface, described Mike's pin and described USB
The D+ pin of output interface is connected；
Described D+ pin is used for receiving signal, and is exported by described Mike's pin.
8. audio signal switching device as claimed in claim 3, it is characterised in that
Described rectification unit comprises at least one diode, the input phase of the positive pole of described diode and described rectification unit
Even, the negative pole of described diode is connected with the outfan of described rectification unit.
9. audio signal switching device as claimed in claim 4, it is characterised in that
Described rectification unit comprises at least one diode, the input phase of the positive pole of described diode and described rectification unit
Even, the negative pole of described diode is connected with the outfan of described rectification unit.
10. audio signal switching device as claimed in claim 5, it is characterised in that
Described rectification unit comprises at least one diode, the input phase of the positive pole of described diode and described rectification unit
Even, the negative pole of described diode is connected with the outfan of described rectification unit.
11. audio signal switching devices as claimed in claim 6, it is characterised in that
Described rectification unit comprises at least one diode, the input phase of the positive pole of described diode and described rectification unit
Even, the negative pole of described diode is connected with the outfan of described rectification unit.
12. audio signal switching devices as claimed in claim 7, it is characterised in that
Described rectification unit comprises at least one diode, the input phase of the positive pole of described diode and described rectification unit
Even, the negative pole of described diode is connected with the outfan of described rectification unit.
13. audio signal switching devices as claimed in claim 3, it is characterised in that
The secondary coil of described booster transformer comprises two output pins；The input of described rectification unit comprises two inputs
Pin；
Two output pins of described secondary coil are connected with two input pins of described rectification unit respectively；
Described rectification unit comprises two diodes, the positive pole of said two diode respectively with two of described rectification unit
Input pin is connected.
14. audio signal switching devices as claimed in claim 3, it is characterised in that
Described filter unit comprises capacitor；
One end of described capacitor is connected with input or the outfan of described filter unit；
The input of described filter unit is connected with outfan.
15. audio signal switching devices as claimed in claim 1 or 2, it is characterised in that
Described first audio signal input pin comprises: left channel pin and/or R channel pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310320745.1A CN103414071B (en) | 2011-06-15 | 2011-06-15 | A kind of audio signal reception and switching device |
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| CN201310320745.1A CN103414071B (en) | 2011-06-15 | 2011-06-15 | A kind of audio signal reception and switching device |
| CN2011101611920A CN102377088B (en) | 2011-06-15 | 2011-06-15 | Audio signal receiving and transferring device |
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| CN2011101611920A Division CN102377088B (en) | 2011-06-15 | 2011-06-15 | Audio signal receiving and transferring device |
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| CN103414071A CN103414071A (en) | 2013-11-27 |
| CN103414071B true CN103414071B (en) | 2016-08-10 |
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| CN111030465B (en) * | 2019-12-24 | 2022-07-19 | 深圳市绿联科技股份有限公司 | Wireless audio receiving device with isolated power supply |
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| CN201663675U (en) * | 2010-04-23 | 2010-12-01 | 中兴通讯股份有限公司 | Headphone audio power amplifier |
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| CN201830430U (en) * | 2010-10-09 | 2011-05-11 | 三星电子株式会社 | Self-powered earphone with active noise cancellation function |
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| CN1422094A (en) * | 2001-11-27 | 2003-06-04 | Lg电子株式会社 | Apparatus and method for controlling multifunction device of mobile terminal |
| CN1774143A (en) * | 2005-10-13 | 2006-05-17 | 方泰公司 | Earphone output circuit capable of omitting block capacitor |
| CN101207256A (en) * | 2006-12-20 | 2008-06-25 | 鸿富锦精密工业（深圳）有限公司 | Audio signal switching device |
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| CN101426158A (en) * | 2007-10-31 | 2009-05-06 | 鸿富锦精密工业（深圳）有限公司 | Audio switching device having volume regulating function |
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| CN103414071A (en) | 2013-11-27 |
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