We found this circuit in the 1990 Philips Databook. The circuit is a commercial application of the decoder in stereo FM radio receivers.
The circuit shown is from the 1994 National Semiconductor Linear Applications Handbook. The...
This precision circuit, which also functions as a bridge, was found in a February 1967 Popular...
This circuit was obtained from a Hands On-Electronics, an American magazine from January 1987. This...