This JFET amplifier stage was found in the Encyclopedia of Electronic Circuits Volume 5 from 1995. Any JFET can be used and the bias controlled externally.
This circuit is part of an article published in the March 1990 issue of Radio Electronics...
Found in an American publication from 1968, this circuit aims to keep the torque of a DC motor...
In the figure we have the typical circuit of a Baxandall tone control applied to an operational...