Muting circuit

Electrical audio signal processing systems and devices – Noise or distortion suppression – Soft switching – muting – or noise gating

Patent

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Details

330 51, 381 94, H04B 1500

Patent

active

058388036

ABSTRACT:
There is provided a mute control circuit which is simplified to efficiently remove switching noise during the muting of each output and reducing the number of connection pins required for a given integrated circuit. The mute control circuit includes a pulse generator for receiving the each mute signal and generating a control pulse; a charge/discharge signal generator for receiving the control pulse and generating a charge/discharge signal and a switching control signal; a controller for receiving the charge/discharge signal and controlling the mute operation of the output terminal according to the switching control signal; and a switching signal generator for receiving the mute signal, generating a switching signal according to the switching control signal of the charge/discharge signal generator, and supplying the switching signal to the controller.

REFERENCES:
patent: Re32278 (1986-11-01), Yokota
patent: 4390847 (1983-06-01), Yamada

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