Circuitry for suppressing audible noise

Claim 1

An arrangement for suppressing audible noise occurring when audio equipment is switched on and off, comprising: an amplifier with output means; a first electronic switch connected to said output means of said amplifier; an amplifier load impedance connected to said amplifier output means through said first electronic switch: said amplifier having a negative feedback loop formed between said output means and an inverting input of said amplifier; junction connection means between said load impedance and said first electronic switch; and a second electronic switch connected between said junction connection means and said inverting input of said amplifier; a power-amplification stage connected to said output means of said amplifier; a voltage-amplification stage with an inverting input terminal; and a third electronic switch closing said negative-feedback loop from an output connection of said power-amplification stage to said inverting input terminal of said voltage-amplification stage when said first electronic switch and said second electronic switch are simultaneously blocked, said first electronic switch and said second electronic switch operating in a mute mode when being blocked simultaneously.