The circuit below was suggested by the Motorola Linear Databook of 1990. The component used is uncommon and the power can be between 7.5 and 12 V.
This simple audio signal tracer or follower can be made with a BC548 instead of the original...
The LM105 integrated circuit consists of a voltage regulator integrated in a metallic enclosure. The...
This circuit for analog video signals was found in a March 1988 Radio Electronics. The Maxim...