Noise gate and on-off mute combined circuit

Abstract

The invention provides a noise gate and on-off mute combined circuit. The circuit comprises an on-off mute circuit and a noise gate circuit. The noise gate circuit comprises a level amplifying and phase-inverting circuit module, a full-wave rectifying and retaining circuit module and a voltage amplifying and current amplifying circuit module. The output end of the level amplifying and phase-inverting circuit module is connected with the input end of the full-wave rectifying and retaining circuit module. The output end of the full-wave rectifying and retaining circuit module is connected with the input end of the voltage amplifying and current amplifying circuit module. The output end of the voltage amplifying and current amplifying circuit module is connected with the input end of a mute execution circuit module. The on-off mute circuit is connected with the input end of the mute execution circuit module. A signal input end is connected with the input end of the noise gate circuit. The output end of the mute execution circuit module is connected with a signal output end. A noise gate function and an on-off mute function are achieved. At the same time, the material cost is lowered, and the circuit is simple and reliable.

Description

technical field [0001] The invention belongs to the technical field of audio circuits, and in particular relates to a combination circuit of a noise gate and a switch for mute. Background technique [0002] Audio devices are widely used in various occasions such as KTV, bars, public broadcasting, background music, home theater, etc. to bring beautiful auditory effects to people. In actual use, the audio system often emits "slightly" noise when there is no audio signal. Noise sources include: the slightest noise from the speaker, the background noise from the mixer of the microphone, the pre-equipment of the microphone or other reasons, and the impact noise of the equipment when switching on and off. Especially in a relatively quiet environment, the noise is unbearable. [0003] Generally speaking, all the existing audio devices are equipped with a power-on / off mute circuit for eliminating the power-on / off impact noise, but it only eliminates the power-on / off impact noise, ...

AI Technical Summary

Problems solved by technology

However, in the existing audio devices, the noise gate circuit and the switch mute circuit used are independent, resulting in complex and redundant circuit structure of the equipment, many circuit components, high manufacturing cost, and many fault points.

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