Audio Amplifier turn-off control circuit.

摘要

A circuit comprising a transistor (10) which, when supply (VS) is turned off, locks the output (9) of the audio amplifier (1) to the supply line (11), the potential of which is reduced gradually by a filter capacitor (25), so that the output voltage (Vo) follows the supply voltage (VS) with the same slope, and is so controlled by the filter capacitor (25), thus eliminating undesired noise ("popping") at the output (9) caused by electric transients in the audio amplifier. <IMAGE>