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An audio signal receiving and switching device

An audio signal and switching device technology, applied in the field of electronics, can solve the problems of low output power of a low-impedance voice coil speaker interface, increase the cost of electronic devices, increase the volume of electronic devices, etc., and achieve low hardware costs and reduced volume. , the effect of reducing costs

Active Publication Date: 2016-08-10
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 the battery can work normally, which increases the cost of the electronic device and increases the volume of the electronic device

Method used

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  • An audio signal receiving and switching device
  • An audio signal receiving and switching device
  • An audio signal receiving and switching device

Examples

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no. 1 example

[0068] figure 1 It is a schematic diagram of the structure of the first embodiment of the audio signal switching device of the present invention; figure 1 As shown, the audio signal switching device includes: a speaker interface, a boost unit (such as figure 1 Step-up transformer shown), rectifier unit, filter unit, USB output interface (such as figure 1 USB plug shown); where:

[0069] The speaker interface is used to connect to an audio signal sending device (for example, a mobile phone), to receive audio signals output by the audio signal sending device, and to output signals to the audio signal sending device.

[0070] The aforementioned speaker interface can be a low-impedance voice coil speaker interface (for example, a headphone jack), which includes: audio signal input pins (such as figure 1 AUDIO pin shown), microphone pin (such as figure 1 MIC pin shown), ground pin (such as figure 1 GND pin shown).

[0071] The audio signal input pin of the speaker interface is connected to...

no. 2 example

[0108] image 3 It is a schematic structural diagram of the second embodiment of the audio signal switching device of the present invention; image 3 As shown, the difference between the second embodiment of the audio signal switching device and the first embodiment is:

[0109] In the second embodiment of the audio signal switching device, the audio signal output pin (D+ pin) is connected to any output pin of the output terminal of the step-up transformer for outputting audio signals to the USB device connected to it.

[0110] The second embodiment of the audio signal receiving device is the same as the first embodiment.

no. 3 example

[0112] Figure 4 It is a schematic diagram of the structure of the third embodiment of the audio signal switching device of the present invention; Figure 4 As shown, the difference between the third embodiment of the audio signal switching device and the first embodiment is:

[0113] In the third embodiment of the audio signal switching device, only one output pin in the secondary coil of the step-up transformer is connected to the input pin of the rectifier unit. Therefore, the rectifier unit only needs to include one input pin, and only one input pin is required in the rectifier unit. Just include a diode.

[0114] Obviously, compared with the first embodiment, using this embodiment will lose half of the power of the secondary coil of the step-up transformer, but can simplify the circuit structure and reduce the hardware cost.

[0115] In this embodiment, the other output pin in the secondary coil of the step-up transformer is grounded, and the step-up transformer does not include...

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Abstract

The invention discloses an audio signal switching device which comprises an input interface and a USB output interface. The audio signal switching device further comprises a boosting unit and a signal amplifier. The input interface is a headphone jack and 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 connected with the first audio signal input pin, and outputting the audio signal to the input end of the boosting unit. The USB output interface comprises an audio signal output pin. The boosting unit is used for boosting the audio signal input by the input end of the boosting unit and outputting the boosted audio signal to the signal amplifier through the output end of the boosting unit. The signal amplifier is connected with the output end of the boosting unit and the audio signal output pin of the USB output interface to be used for outputting the amplified audio signal. The audio signal output pin is a D+ pin or a D- pin in the USB output interface.

Description

Technical field [0001] The invention relates to the field of electronic technology, and in particular to an audio signal receiving device and 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 interfaces. For example, the electronic device may be connected to the mobile communication device through a low-impedance voice coil speaker interface (for example, a headphone jack) of the mobile communication device (for example, 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, in addition to 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 built-in The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01R31/06H01R13/66
Inventor 李东声
Owner TENDYRON CORP
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