Typical electronic volume control circuit

Typical electronic volume control circuit

Shown is a typical electronic volume control circuit . This circuit is often used in stereo audio equipment to adjust and control the volume through a computer ( CPU ) .
Stereo signals are input via @ and ⑩ pins respectively, and output from ② and ◎ pins after adjustment. The control signals of the CPU
(clock, data and standby) are sent to the TC9211P from the ⑩~@ pins, decoded and D/A converted by the interface circuit, and turned into analog signals to control the amplitude of the input
signal , thereby achieving the purpose of controlling the volume. .