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Mute circuits and audio equipment

A technology for audio equipment and mute circuits, applied in transducer circuits, electrical components, signal processing, etc., can solve problems such as damage to speaker speakers and unacceptable users

Active Publication Date: 2020-11-17
SHENZHEN TENDZONE INTELLIGENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The audio signals of audio equipment such as digital audio processors and digital tuners are output by a digital-to-analog converter (DAC), and then sent to speakers via an audio amplifier. ) process, the speaker will emit popping sound, making it difficult for users to accept, and even damage the speaker

Method used

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  • Mute circuits and audio equipment
  • Mute circuits and audio equipment

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Embodiment Construction

[0021] In order to facilitate the understanding of the present invention, the invention will be described more fully below with reference to the associated drawings. A preferred embodiment of the invention is shown in the drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present invention will be thorough and complete.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0023] figure 1 It i...

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PUM

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Abstract

The invention relates to a silencing circuit and audio equipment. An on / off detection module is used for detecting whether the audio equipment is powered on or not, outputting a first level when thatthe audio equipment is powered on is detected, and outputting a second level when that the audio equipment is powered off is detected; and the first level is higher than the second level. A main control delay module is used for outputting the second level when the audio equipment is powered on or off and the main control module is unstable, and outputting the first level when the main control module is powered on and stable. A silence control module is used for outputting a control signal for controlling the audio equipment to communicate with an audio amplifier when both a first input end anda second input end receive the first level, and outputting a control signal for controlling the audio equipment and the audio amplifier to be switched off when at least one of the first input end andthe second input end receives the second level. The silencing circuit can eliminate the burst sound in the process of powering-on and off of the audio equipment well.

Description

technical field [0001] The invention relates to the field of audio circuits, in particular to a mute circuit and audio equipment. Background technique [0002] The audio signals of audio equipment such as digital audio processors and digital tuners are output by a digital-to-analog converter (DAC), and then sent to speakers via an audio amplifier. ) process, the speaker will emit a popping sound, which is unacceptable to the user and may even damage the speaker. The main reason for this phenomenon is that when the power is turned on or off, the positive and negative power supply voltages of the audio equipment are not synchronized, the DC potential difference between the two ends of the coupling capacitor is charged and discharged, or the data error of the digital-to-analog converter causes a large voltage change, resulting in electric shock. Contents of the invention [0003] Based on this, it is necessary to provide a mute circuit and audio equipment that can effective...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R3/00
CPCH04R3/00H04R2430/00
Inventor 刘付武卢浩陈丽霞
Owner SHENZHEN TENDZONE INTELLIGENT TECH