This circuit was found in documentation from the 1980s. It is powered by the audio signal that must be cut. Transformers are the critical components and transistors are 2N2222.
We published this circuit in a magazine of the 90s, but it is still present by the components it...
The circuit is from the 1990 Motorola Linear Databook, but can be implemented with other operating...
This circuit was found in the January 1996 issue of Electronics Now magazine. The circuit is...