We found this circuit in the April 1993 Electronics Now magazine. Almost any general-purpose JFET can be used. Power is supplied by a battery (2 x 9V).
This is a typical amplifier circuit for a commercial tape recorder from 1968. The circuit has an...
This circuit functions as a variable capacitor controlled by a potentiometer, multiplying the...
This differentiator for the positive front of the input signal can be elaborated based on any...