Stereo FM Transmitter (CB8459E)

This circuit was found in a 90s Radio Electronics. The FM encoder or multiplexer is an uncommon component today.

Variable Pulse Generator (CB12684E)
The width of the pulses produced by the oscillator in the figure is determined by the value of R1,...
Quadrature Oscillator (CB14044E)
We found this approximately 1.5 kHz oscillator in Texas Instruments technical documentation. The...
Event Detector (CB16936E)
This circuit was suggested by old French documentation, but it can be used as a shield, in which...