This circuit was suggested by General Electric / RCA in a 1980s documentation. The components are of the time and the circuit must be powered by symmetrical source.
The circuit shown in the figure was found in a 1974 publication. The field effect transistor may...
I found this circuit in an English publication from 1989. This configuration can be mounted with...
We found this circuit in a small espionage manual from 1993. The components are current, and the...