This circuit was found in a Popular Electronics from the 90s. The circuit uses a general purpose JFET. The coils depend on the signal range that must be amplified.
This circuit is a high voltage source for a gas LASER. We found it in a documentation from the...
With this circuit it is possible to control a current of several amps, depending on Q1, from a low...
Datasheet of We found this circuit in the 1982 SGS Linear Integrated Circuits manual. A | table...