CN103414068A - Audio signal switching device - Google Patents
Audio signal switching device Download PDFInfo
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- CN103414068A CN103414068A CN2013103177530A CN201310317753A CN103414068A CN 103414068 A CN103414068 A CN 103414068A CN 2013103177530 A CN2013103177530 A CN 2013103177530A CN 201310317753 A CN201310317753 A CN 201310317753A CN 103414068 A CN103414068 A CN 103414068A
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Abstract
The invention discloses an audio signal switching device which comprises an input port and an output port. The audio signal switching device further comprises a boosting unit and a signal amplifier. The input port is a headphone jack. The headphone jack comprises a first audio signal input pin. The first audio signal input pin is used for receiving an audio signal sent by an audio signal sending device and outputting the audio signal to the input end of the boosting unit. The output port comprises an audio signal output pin. The boosting unit is connected with the first audio signal input pin in the headphone jack and used for boosting the audio signal received by the first audio signal input pin and outputting the boosted audio signal. The signal amplifier is connected with the output end of the boosting unit. The output end of the signal amplifier is connected with the audio signal output pin, and the signal amplifier is used for outputting the amplified audio signal.
Description
Technical field
The present invention relates to electronic technology field, relate in particular to a kind of audio signal switching device.
Background technology
Along with the development of audio-frequency signal coding/decoding technique, the electronic equipment that transmits data by audio interface is more and more.For example, the low-resistance voice coil type horn interface (for example, earphone interface) that electronic equipment can pass through mobile communications device (for example, mobile phone) is connected with mobile communications device, receives the audio signal of mobile communications device output.
Because the power output of low-resistance voice coil type horn interface is very little, except the very little electronic equipment of power consumption (as earphone), electronic equipment by low-resistance voice coil type horn interface received audio signal need to use external power supply or built-in battery to work usually, increase the cost of electronic equipment, increased the volume of electronic equipment.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the deficiencies in the prior art, and a kind of audio signal switching device of audio signal of exportable amplification is provided.
In order to address the above problem, the invention provides a kind of audio signal switching device, a kind of audio signal switching device comprises: input port, output port; In described audio signal switching device, also comprise: boosting unit and signal amplifier, wherein:
Described input port is earphone interface, in described earphone interface, comprises the first audio signal input pin, the audio signal that described the first audio signal input pin sends for the received audio signal transmitting apparatus, and export it input of described boosting unit to;
In described output port, comprise the audio signal output pin;
Described boosting unit, be connected with the first audio signal pin in described earphone interface, for the audio signal that the first audio signal input pin is received, boosts, and the output of the audio signal after boosting;
Described signal amplifier, be connected with the output of described boosting unit, and the output of described signal amplifier is connected with described audio signal output pin, be used to exporting the audio signal after amplification.
In addition, described boosting unit is step-up transformer, and described step-up transformer comprises primary coil and secondary coil;
A pin of described primary coil is connected with described the first audio signal input pin as the input of described boosting unit, another pin ground connection of described primary coil;
At least one output pin of described secondary coil is connected with the input of described rectification unit as the output of described boosting unit, the tap ground connection of described secondary coil.
In addition, in described audio signal switching device, also comprise:
Rectification unit, be connected with described boosting unit, carries out rectification for the audio signal to after boosting, and the level obtained after rectification is exported to the output of described filter unit;
Filter unit, be connected with described rectification unit, for described level is carried out to filtering, and the DC level obtained after filtering exported to the power supply output pin of described output port.
In described rectification unit, comprise at least one diode, the positive pole of described diode is connected with the input of described rectification unit, and the negative pole of described diode is connected with the output of described rectification unit.
In addition, the secondary coil of described step-up transformer comprises two output pins; The input of described rectification unit comprises two input pins;
Two output pins of described secondary coil are connected with two input pins of described rectification unit respectively;
In described rectification unit, comprise two diodes, the positive pole of described two diodes is connected with two input pins of described rectification unit respectively.
In addition, in described filter unit, comprise capacitor;
One end of described capacitor is connected with input or the output of described filter unit;
The input of described filter unit is connected with output.
Audio signal switching device as claimed in claim 1, is characterized in that,
In described input port, also comprise Mike's pin, described Mike's pin is used for to connected audio signal transmitting apparatus output signal.
In addition, described the first audio signal input pin comprises: L channel pin and/or R channel pin.
In sum, the above embodiment of the present invention has realized the audio frequency feeding function by lower hardware cost, with audio signal switching device of the present invention (for example, tone frequency channel wire or audio conversion joint) while being used in conjunction with, electronic equipment (audio signal receiving equipment) can obtain electric energy in received audio signal, reduce the cost of electronic equipment, reduced the volume of electronic equipment.
The accompanying drawing explanation
Fig. 1 is the structural representation of audio signal switching device the first embodiment of the present invention;
Fig. 2 is the structural representation of audio signal switching device the second embodiment of the present invention;
Fig. 3 is the structural representation of audio signal switching device of the present invention the 3rd embodiment;
Fig. 4 is the structural representation of audio signal switching device of the present invention the 4th embodiment;
Fig. 5 is the structural representation of audio signal switching device of the present invention the 5th embodiment.
Embodiment
Below in conjunction with drawings and Examples, describe the present invention.
Audio signal switching device of the present invention can be that tone frequency channel wire, audio transiting wire, audio repeating are first-class.
The first embodiment
Fig. 1 is the structural representation of audio signal switching device the first embodiment of the present invention; As shown in Figure 1, this audio signal switching device comprises: horn interface, boosting unit (step-up transformer as shown in Figure 1), rectification unit, filter unit, power supply output pin (VCC pin as shown in Figure 1), audio signal output pin; Wherein:
Horn interface, for for example, with audio signal transmitting apparatus (, mobile phone), being connected, the audio signal of received audio signal transmitting apparatus output.
Above-mentioned horn interface can be low-resistance voice coil type horn interface (for example, earphone interface), wherein comprises: audio signal input pin (AUDIO pin as shown in Figure 1), ground wire pin (GND pin as shown in Figure 1).
In addition, in horn interface, can also comprise Mike (MIC) pin, this pin is used for to connected audio signal transmitting apparatus output signal.
The audio signal input pin of horn interface is connected with a pin of the primary coil of step-up transformer; For example, for the audio signal of received audio signal transmitting apparatus (, mobile phone) transmission, and export it above-mentioned pin of primary coil to; The ground wire pin ground connection of horn interface.
Alternatively, in order to reduce the power consumption of audio signal transmitting apparatus, not shown in the resistance R 2(Fig. 1 that can also connect between audio signal input pin and step-up transformer).
Step-up transformer, comprise primary coil and secondary coil, for the input voltage by input (primary coil) (being generally the 1V left and right), is increased to the output voltage (for example, being more than or equal to 5V) of output (secondary coil).
The primary coil of step-up transformer comprises two pins, and a pin is connected with the audio signal input pin of horn interface, another pin ground connection.
The output winding of step-up transformer comprises two output pins and a tap, and two output pins are connected with two input pins of rectification unit input respectively, tap ground connection.
Rectification unit, comprise input and output, carries out rectification for the interchange level to the input of its input, exports the level after rectification by output.
In the present embodiment, rectification unit comprises two input pins of input, an output pin of output; Correspondingly, in rectification unit, comprise two diodes, the positive pole of two diodes is connected with two input pins of rectification unit respectively, and the negative pole of two diodes is connected with the output pin of rectification unit.
Filter unit, comprise input and output, for the level by the input input, is converted into the smooth direct current level, and exports by output.
In the present embodiment, the input of filter unit is connected with the output of rectification unit, and the output of filter unit is as power supply output pin (or being connected with the power supply output pin), for the functional module of coupled electronic equipment or electronic equipment provides power supply.
In the present embodiment, the input of filter unit is connected with output, and comprises the capacitor C 1 that an end is connected with input/output, the other end ground connection of capacitor C 1.
In addition, in the present embodiment, the audio signal output pin is connected with an output pin of the output winding of step-up transformer, for output audio signal.
Alternatively, between the output pin of the output winding of audio signal output pin and step-up transformer, can also comprise signal amplifier, the input that is signal amplifier is connected with an output pin of the output winding of step-up transformer, the output of signal amplifier, as audio signal output pin (or being connected with the audio signal output pin), is exported the audio signal after amplifying.
As shown in Figure 1, in the present embodiment, in signal amplifier, comprise resistance R 1 and NPN type triode, one end of resistance R 1 is connected with the input of signal amplifier, the other end is connected with the base stage (B) of NPN type triode, the collector electrode (C) of NPN type triode is connected with the output of signal amplifier, emitter (E) ground connection of NPN type triode.
In addition, in signal amplifier, also can comprise resistance R 1 and positive-negative-positive triode, one end of resistance R 1 is connected with the input of signal amplifier, the other end is connected with the collector electrode (C) of positive-negative-positive triode, the base stage of positive-negative-positive triode (B) is connected with the output of signal amplifier, the emitter of positive-negative-positive triode (E) ground connection.
The second embodiment
Fig. 2 is the structural representation of audio signal switching device the second embodiment of the present invention; As shown in Figure 2, the difference of second embodiment of the invention and the first embodiment is:
The audio signal output pin is connected with the audio signal input pin of horn interface.
Alternatively, between the audio signal input pin of audio signal output pin and horn interface, can also comprise signal amplifier, the input that is signal amplifier is connected with the audio signal input pin, the output of signal amplifier, as audio signal output pin (or being connected with the audio signal output pin), is exported the audio signal after amplifying.
The 3rd embodiment
Fig. 3 is the structural representation of audio signal switching device of the present invention the 3rd embodiment; As shown in Figure 3, the difference of third embodiment of the invention and the first embodiment is:
In third embodiment of the invention, only an output pin in the step-up transformer secondary coil is connected with the input pin of rectification unit, so rectification unit only need comprise an input pin, in rectification unit, only need comprise a diode and get final product.
Obviously, compare with the first embodiment, adopt the present embodiment will lose half electric energy of step-up transformer secondary coil, but can simplify circuit structure, reduce hardware cost.
In the present embodiment, another output pin ground connection in the step-up transformer secondary coil, and step-up transformer does not comprise tap.
The 4th embodiment
Fig. 4 is the structural representation of audio signal switching device of the present invention the 4th embodiment; As shown in Figure 4, the difference of fourth embodiment of the invention and the first embodiment is:
In the 4th embodiment, the audio signal input pin of horn interface comprises L channel pin and R channel pin, and the L channel pin is connected with the same pin of the primary coil of step-up transformer with the R channel pin.
The 5th embodiment
Fig. 5 is the structural representation of audio signal switching device of the present invention the 5th embodiment; As shown in Figure 5, the difference of fifth embodiment of the invention and the 4th embodiment is:
In the 5th embodiment, the audio signal input pin of horn interface comprises L channel pin and R channel pin, and the L channel pin is connected with the input of signal amplifier, for output audio signal; The R channel pin is connected with a pin of the primary coil of step-up transformer, be used to exporting electric energy.
Certainly, can be also that the R channel pin is connected with the input of signal amplifier, for output audio signal; The L channel pin is connected with a pin of the primary coil of step-up transformer, be used to exporting electric energy.
The above embodiment of the present invention has realized the audio frequency feeding function by lower hardware cost, while with audio signal switching device of the present invention, being used in conjunction with, electronic equipment can obtain electric energy in received audio signal, reduced the cost of electronic equipment, has reduced the volume of electronic equipment.
Certainly, according to basic principle of the present invention, the horn interface in above-described embodiment can be replaced with have the audio signal input pin, the input port of other type of Mike's pin and ground wire pin.
In addition, above-mentioned input port can be fixedly connected on the audio signal transmitting apparatus.
In addition, above-mentioned output port can be fixedly connected on electronic equipment (audio signal receiving equipment).
Above-mentioned input port can be divided into a plurality of plugs, for example, is divided into the audio signal plug that comprises the audio signal input pin, and the Mike's plug that comprises Mike's pin.
Claims (8)
1. an audio signal switching device, comprise: input port, output port; It is characterized in that, also comprise in described audio signal switching device: boosting unit and signal amplifier, wherein:
Described input port is earphone interface, in described earphone interface, comprises the first audio signal input pin, the audio signal that described the first audio signal input pin sends for the received audio signal transmitting apparatus, and export it input of described boosting unit to;
In described output port, comprise the audio signal output pin;
Described boosting unit, be connected with the first audio signal pin in described earphone interface, for the audio signal that the first audio signal input pin is received, boosts, and the output of the audio signal after boosting;
Described signal amplifier, be connected with the output of described boosting unit, and the output of described signal amplifier is connected with described audio signal output pin, be used to exporting the audio signal after amplification.
2. audio signal switching device as claimed in claim 1, is characterized in that,
Described boosting unit is step-up transformer, and described step-up transformer comprises primary coil and secondary coil;
A pin of described primary coil is connected with described the first audio signal input pin as the input of described boosting unit, another pin ground connection of described primary coil;
At least one output pin of described secondary coil is connected with the input of described rectification unit as the output of described boosting unit, the tap ground connection of described secondary coil.
3. audio signal switching device as claimed in claim 1 or 2, is characterized in that, also comprises in described audio signal switching device:
Rectification unit, be connected with described boosting unit, carries out rectification for the audio signal to after boosting, and the level obtained after rectification is exported to the input of described rectification unit;
Filter unit, be connected with described rectification unit, for described level is carried out to filtering, and the DC level obtained after filtering exported to the power supply output pin of described output port.
4. audio signal switching device as claimed in claim 3, is characterized in that,
In described rectification unit, comprise at least one diode, the positive pole of described diode is connected with the input of described rectification unit, and the negative pole of described diode is connected with the output of described rectification unit.
5. audio signal switching device as claimed in claim 4, is characterized in that,
The secondary coil of described step-up transformer comprises two output pins; The input of described rectification unit comprises two input pins;
Two output pins of described secondary coil are connected with two input pins of described rectification unit respectively;
In described rectification unit, comprise two diodes, the positive pole of described two diodes is connected with two input pins of described rectification unit respectively.
6. audio signal switching device as claimed in claim 3, is characterized in that,
In described filter unit, comprise capacitor;
One end of described capacitor is connected with input or the output of described filter unit;
The input of described filter unit is connected with output.
7. audio signal switching device as claimed in claim 1, is characterized in that,
In described input port, also comprise Mike's pin, described Mike's pin is used for to connected audio signal transmitting apparatus output signal.
8. described audio signal switching device as arbitrary as claim 1 to 7, is characterized in that,
Described the first audio signal input pin comprises: L channel pin and/or R channel pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310317753.0A CN103414068B (en) | 2011-06-15 | 2011-06-15 | A kind of audio signal switching device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310317753.0A CN103414068B (en) | 2011-06-15 | 2011-06-15 | A kind of audio signal switching device |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110161194.XA Division CN102354883B (en) | 2011-06-15 | 2011-06-15 | Audio signal transfer device |
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| CN103414068A true CN103414068A (en) | 2013-11-27 |
| CN103414068B CN103414068B (en) | 2016-06-15 |
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| CN201310317753.0A Active CN103414068B (en) | 2011-06-15 | 2011-06-15 | A kind of audio signal switching device |
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| CN201805500U (en) * | 2010-10-19 | 2011-04-20 | 广州市索爱数码科技有限公司 | Audio-video selection switching circuit |
| 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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2011
- 2011-06-15 CN CN201310317753.0A patent/CN103414068B/en active Active
Patent Citations (8)
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| CN201025577Y (en) * | 2007-02-12 | 2008-02-20 | 姜小华 | A sound picker device with voltage increase circuit |
| CN201130933Y (en) * | 2007-11-27 | 2008-10-08 | 蔡南星 | Wireless acoustic enclosure |
| US20090156036A1 (en) * | 2007-12-18 | 2009-06-18 | Hyundai Motor Company | Multimedia cable |
| CN201315646Y (en) * | 2008-12-23 | 2009-09-23 | 深圳创维－Rgb电子有限公司 | Digital audio interface circuit for TV |
| CN201601813U (en) * | 2009-12-16 | 2010-10-06 | 比亚迪股份有限公司 | Earphone output circuit and mobile communication terminal |
| CN201663675U (en) * | 2010-04-23 | 2010-12-01 | 中兴通讯股份有限公司 | Headphone audio power amplifier |
| 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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