Volume control for audio signal system has receiver connected to control module and variable amplifier circuit connected to loudspeaker

摘要

The system may be for a radio. An antenna (1) is connected to a receiver (2) with outputs to a control module (4) and a variable amplifier (3). The control module is connected to a volume control knob (7) and there is a connection (2) to the amplifier. Amplification levels for normal operation are stored in two memory units (A,B). The loudspeaker (6) is driven from the amplifier.