Circuit for eliminating impact sound generated in switching process

A technology to eliminate switches and switching circuits, applied in the direction of electrical components, amplification control, gain control, etc., can solve the problems of high cost, generation of large current pulses, hidden dangers of reliability, etc., achieve low circuit cost, eliminate impact sound, Simple and reasonable effect

Active Publication Date: 2010-05-12
SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to eliminate the impact sound generated by the audio equipment at the moment of power-on and power-off, audio equipment generally adopts the method of making the audio power amplifier in the mute state at the moment of power-on and power-off, but the current circuit for realizing this method has complex circuit structure, high cost, and There will be a large current pulse at the moment of turning on and off, and there are certain hidden dangers in reliability

Method used

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  • Circuit for eliminating impact sound generated in switching process
  • Circuit for eliminating impact sound generated in switching process
  • Circuit for eliminating impact sound generated in switching process

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Embodiment Construction

[0009] see figure 1 As shown, the present invention is a circuit for eliminating the impact sound of switching machines, including a power supply, a switching voltage generating circuit, a power-on response switching circuit and a power-off response switching circuit connected to the switching voltage generating circuit, and a power-on response switching circuit and a power-off response switching circuit connected to the power-on response switching circuit. The audio power amplifier at the output end of the switch circuit is connected to the power supply. The power supply provides +5V voltage, and the switch voltage generating circuit provides a switch voltage signal U1 to control the power-on response switch circuit and the power-off response switch circuit; the power-on response switch circuit is turned on when the audio equipment is turned on Instantly provide a mute signal MUTE for the audio power amplifier; the shutdown response switch circuit provides a mute signal MUTE f...

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PUM

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Abstract

The invention discloses a circuit for eliminating impact sounds generated in switching process. The circuit comprises a power supply and an audio power amplifier. A switch voltage generation circuit is connected with the power supply, and the switch voltage generation circuit is connected with a turn-on response switch circuit and a turn-off response switch circuit; the switch voltage generation circuit provides a switch voltage signal to control the turn-on response switch circuit and the turn-off response switch circuit; and the output terminals of the turn-on response switch circuit and the turn-off response switch circuit are connected with the audio power amplifier so as to provide a silencing signal for the audio power amplifier during the turn-on and turn-off moment. The switch voltage generation circuit outputs a switch voltage signal U1 to control the turn-on response switch circuit and the turn-off response switch circuit, thus outputting effective silencing signal MUTE, andeliminating the impact sounds during the turn-on and turn-off process. The circuit can effectively and reliably eliminate the impact sounds of the audio equipment in the turn-on and turn-off process,has low cost, and is simple, reasonable, safe and reliable.

Description

【Technical field】 [0001] The invention relates to the technical field of audio equipment products, in particular to a circuit for eliminating the impact sound of switching on and off the audio equipment. 【Background technique】 [0002] For audio equipment such as televisions, DVDs, and stereos, the sound system generally inputs small audio signals into the audio power amplifier circuit, and then outputs them to the speaker after being processed and amplified by the audio power amplifier circuit, and the speaker emits sound. The audio power amplifier circuit of audio equipment is very important to the sound system, and the design of the audio power amplifier circuit often affects the effect of the TV sound system. When the audio equipment is turned on and off, due to the coupling effect of the internal capacitance and inductance of the audio power amplifier, irregular audio signals are easily output to the speaker, resulting in an impact sound. In order to eliminate the impa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03G3/00
Inventor 徐遥令
Owner SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
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