This very high input impedance JFET circuit was found in the 1995 Encyclopedia of Electronic Circuits Volume 5. The JFET is a general-purpose transistor as is the output transistor.
This circuit is an excellent application for the PIC in audio, but the reader who intends to do...
In this simple receiver from a 1966 documentation, the base-emitter junction of a germanium...
Using common components, this circuit found in a 2003 publication, controls the level of a water...