A low-power calming circuit
By detecting audio signals through a low-voltage mute circuit and controlling the output high and low levels of the mute circuit using a transistor, the problems of poor real-time performance and noise interference in existing mute solutions are solved, achieving efficient mute control and improving the signal-to-noise ratio and auditory purity.
CN224459985UActive Publication Date: 2026-07-03GUANGZHOU BAOLUN ELECTRONICS CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU BAOLUN ELECTRONICS CO LTD
- Filing Date
- 2025-08-13
- Publication Date
- 2026-07-03
Smart Images
Figure CN224459985U_ABST
Abstract
This invention provides a low-level mute circuit, comprising: a first audio input terminal, a first audio operational amplifier circuit, a first audio differential output terminal, a mute circuit, a second audio input terminal, a second audio operational amplifier circuit, and a second audio differential output terminal. The mute circuit includes a first mute control terminal and a second mute control terminal. When there is a signal input at the first audio input terminal and no signal input at the second audio input terminal, the second mute control terminal outputs a low level, and the mute circuit controls the second audio differential output terminal to be pulled low to ground. When there is a signal input at the second audio input terminal and no signal input at the first audio input terminal, the first mute control terminal outputs a low level, and the mute circuit controls the first audio differential output terminal to be pulled low to ground. This invention controls the amplification or mute of the audio input signal by controlling the conduction or cutoff of a transistor through the high or low level of the mute signal output.
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