This volume compressor uses unusual components today. The circuit was found in documentation from the 1980s. The circuit is for audio signals. The LS150 is a high-performance operational amplifier.
This is the receiver circuit for the previous remote control published in the same Radio...
This circuit, for signals up to 1 MHz, is based on an RCA operational amplifier. The circuit was...
This frequency shift modulation circuit was found in the November 1994 issue of Electronics Now...