Stereo FM Transmitter (CB8459E)

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

DC Regulated DC Converter (CB6099E)
This circuit was found in Siliconix documentation from the 1980s. Equivalent operational...
Ripple suppressor (CB6934E)
Found in documentation from the 90's this circuit is for low currents. The transistor can be...
Code Switch (CB16902E)
Only when the programmed key sequence is activated, and within a minimum time determined by the...