Stereo FM Transmitter (CB8459E)

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

Debouncer (CB9277E)
This circuit was found in a 1967 American documentation. The switching diode (tunnel) used is an...
Sampling and Retention with CA3140 (CB12166E)
This sample and hold circuit is traditionally configured and uses an operational amplifier with...
100 MHz Butler Oscillator (CB9647E)
This oscillator with emitter follower was found in an American documentation from the 80's. The...