We found this circuit in a 1977 National Semiconductor Databook. The circuit can use other FETs like the BF245 and has an input impedance of 10 megohms. The circuit gain is unitary.
We have already explored this configuration in several of our projects. It is equivalent to a...
The figure shows how to increase the output voltage of a 7812 IC with a zener diode. Other...
This circuit, found in a 1980 publication, limits the amplitude of the output signal to a value...