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Audio signal transfer device

An audio signal and switching device technology, applied in the electronic field, can solve the problems of increasing the cost of electronic equipment, low output power of the low-impedance voice coil speaker interface, increasing the volume of electronic equipment, etc., to achieve reduced volume and low hardware cost , cost reduction effect

Active Publication Date: 2013-08-21
TENDYRON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the output power of the low-impedance voice coil speaker interface is very small, except for electronic devices with low power consumption (such as headphones), electronic devices that receive audio signals through the low-impedance voice coil speaker interface usually need to use an external power supply or a built-in Only batteries can work normally, which increases the cost of electronic equipment and increases the volume of electronic equipment

Method used

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  • Audio signal transfer device
  • Audio signal transfer device
  • Audio signal transfer device

Examples

Experimental program
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no. 1 example

[0048] figure 1 It is a schematic structural diagram of the first embodiment of the audio signal switching device of the present invention; figure 1 As shown, the audio signal conversion device includes: speaker interface, booster unit (such as figure 1 Step-up transformer shown), rectifier unit, filter unit, power supply output pin (such as figure 1 VCC pin shown), the audio signal output pin; where:

[0049] The speaker interface is used for connecting with an audio signal sending device (for example, a mobile phone) and receiving an audio signal output by the audio signal sending device.

[0050] The above-mentioned speaker interface can be a low-impedance voice coil speaker interface (for example, a headphone interface), which includes: audio signal input pins (such as figure 1 AUDIO pin shown), ground pin (as figure 1 GND pin shown).

[0051] In addition, the speaker interface may also include a microphone (MIC) pin, which is used to output a signal to an audio signa...

no. 2 example

[0067] figure 2 It is a schematic structural diagram of the second embodiment of the audio signal switching device of the present invention; figure 2 As shown, the difference between the second embodiment of the present invention and the first embodiment is:

[0068] The audio signal output pin is connected with the audio signal input pin of the speaker interface.

[0069] Optionally, a signal amplifier may also be included between the audio signal output pin and the audio signal input pin of the speaker interface, that is, the input end of the signal amplifier is connected to the audio signal input pin, and the output end of the signal amplifier is used as the audio signal output pin. Pin (or connected to the audio signal output pin), output the amplified audio signal.

no. 3 example

[0071] image 3 It is a schematic structural diagram of the third embodiment of the audio signal switching device of the present invention; image 3 As shown, the difference between the third embodiment of the present invention and the first embodiment is:

[0072] In the third embodiment of the present invention, only one output pin of the secondary coil of the step-up transformer is connected to the input pin of the rectification unit, so the rectification unit only needs to include one input pin, and the rectification unit only needs to include one diode. Can.

[0073] Obviously, compared with the first embodiment, this embodiment will lose half of the electric energy of the secondary coil of the step-up transformer, but the circuit structure can be simplified and the hardware cost can be reduced.

[0074] In this embodiment, another output pin of the secondary coil of the step-up transformer is grounded, and the step-up transformer does not include taps.

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Abstract

An audio signal transfer device includes an input port and an output port; the device also includes: a boosting unit, a rectifying unit, and a filtering unit; in which, the input port comprises a first audio signal input pin, which is utilized for receiving an audio signal sent from an audio signal transmit device, and outputting it to an input port of the boosting unit; the boosting unit is utilized for boosting the audio signal input from its input port, and outputting a boosted audio signal through its output port to an input port of the rectifying unit; the rectifying unit is utilized for rectifying a boosted audio signal input from its input port, and outputting a level obtained from the rectify through its output port to an output port of the filtering unit; and a filtering unit is utilized for filtering a level input from its input port, and outputting a direct current level obtained from the filtration through its output port to a power output pin of the output port.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to an audio signal switching device. Background technique [0002] With the development of audio signal encoding / decoding technology, more and more electronic devices transmit data through audio interface. For example, the electronic device may be connected to the mobile communication device through a low-impedance voice coil speaker interface (eg, earphone interface) of the mobile communication device (eg, a mobile phone), and receive audio signals output by the mobile communication device. [0003] Since the output power of the low-impedance voice coil speaker interface is very small, except for electronic devices with low power consumption (such as headphones), electronic devices that receive audio signals through the low-impedance voice coil speaker interface usually need to use an external power supply or a built-in Only batteries can work normally, which increases the cos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01R31/06H01R13/66H01R13/719
CPCH01R31/06H01R13/719H04R3/12H01R13/66H04R3/00H04R2499/11H04R5/033H04R5/04
Inventor 李东声
Owner TENDYRON CORP