This step of good gain was obtained in an American publication of the 1980s. The circuit can be powered by voltages from 3 to 9 V and the FET can be of almost any type.
This circuit simulates an inductor. Or operational amplifier of old type, but a configuration is...
This very high input impedance JFET circuit was found in the 1995 Encyclopedia of Electronic...
Found in a 90’s 303 Circuits, this circuit uses components that are still common and has a common...