The circuit transistors, found in a 1974 documentation, may be the BC548. The circuit is used in quadriphonic systems to combine signals.
This circuit is suggested by an English publication from 1980. It is an RF detector that uses a...
This circuit was found in a Electronics World of 1968. The integrated circuit is the MC1320P from...
The presented circuit simulates a high power zener that depends on the characteristics of the...