This circuit was found in RCA documentation from the 1970s. It was suggested to produce tones for a remote-control encoder at the time. The circuit generates sinusoidal tones of frequencies adjusted in the trimpots.
This circuit was found in RCA documentation from the 1970s. It was suggested to produce tones for a remote-control encoder at the time. The circuit generates sinusoidal tones of frequencies adjusted in the trimpots.