This FM advertising suppressor (SCA) decoder circuit was suggested by Signetics in a 1980s documentation. The circuitry decodes the 67 kHz signal. The integrated circuit used is of the time.
The circuit presented was found in the National Semiconductor Linear Applications Handbook. The...
With the circuit shown in the figure we have a frequency modulation which is produced by a...
The configurations of the two previous circuits can be modified to operate with a simple power...