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Electronic device provided with audio control circuit

An electronic device and audio control technology, applied in transducer circuits, electrical components, sensors, etc., can solve problems affecting normal use of users, and achieve the effect of avoiding POP sound

Inactive Publication Date: 2015-03-25
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The current portable electronic device will produce popping sound at the audio signal output end when switching on and off, that is, POP sound, which will affect the normal use of users

Method used

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  • Electronic device provided with audio control circuit

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Experimental program
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Effect test

Embodiment Construction

[0010] see figure 1 , is a circuit diagram of the audio control circuit in the electronic device in the preferred embodiment of the present invention. The electronic device 1 includes a system decoder chip 10 , a power amplifier chip 20 , an output port 30 , a micro control unit (MCU) 40 , and an audio control circuit 50 . Wherein, the power amplifier chip 20 is connected between the system decoder chip 10 and the output port 30 . The output port 30 is used to connect output devices such as earphones or speakers. The system decoding chip 10 is used to decode the audio signal generated by the electronic device 1 , and the power amplifier chip 20 is used to amplify the decoded audio signal, and then output it to output devices such as earphones or speakers through the output port 30 . The power amplifier chip includes a MUTE port.

[0011] The audio control circuit 50 is connected to the micro control unit 40 and the power amplifier chip 20 . The control unit 40 generates a ...

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PUM

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Abstract

The invention provides an electronic device provided with an audio control circuit. The electronic device comprises a system decoding chip, a power amplification chip and an output port, wherein the power amplification chip is connected between the system decoding chip and the output port. The electronic device further comprises a micro control unit and an audio control unit, wherein the audio control unit is connected with the micro control unit and the power amplification chip; and the micro control unit is used for generating a GPIO (General Purpose Input / Output) control signal to the audio control unit at startup / shutdown to control the audio control signal to generate a mute control signal to the MUTE port of the power amplification chip in order that the power amplification chip executes a mute function without outputting any audio signal to the output port. According to the electronic device, the decoding chip is controlled to perform mute output at startup / shutdown, so that the generation of POP sound is effectively avoided.

Description

technical field [0001] The invention relates to an electronic device with an audio frequency control circuit, in particular to an electronic device for preventing POP sound from being turned on and off. Background technique [0002] When the current portable electronic device is turned on and off, a plosive sound, that is, a POP sound, will be generated at the audio signal output end, thereby affecting the normal use of the user. Contents of the invention [0003] The invention provides an electronic device with an audio control circuit. [0004] An electronic device, comprising a system decoding chip, a power amplifier chip and an output port, wherein the power amplifier chip is connected between the system decoding chip and the output port, the output port is used to connect the output device, and the system decoding chip is used to connect the electronic device The generated audio signal is decoded, and the power amplifier chip is used to amplify the decoded audio sign...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/00
Inventor 任东亮
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD