audio amplifier integrated with unified regulatory functions of 'mute' and 'standby' and of the transient switching.

摘要

An integrated audio amplifier has "mute" and "stand-by" states through which it passes when passing between normal operation and a cut-off state. The amplifier comprises an amplifier circuit (OP) and three threshold comparators (K1, K2, K3) each having an input terminal connected to a common circuit node (P). As a function of the potential values at the circuit node (P), the comparators (K1, K2, K3) regulate the biasing of the amplifier circuit and the transduction of signals.