This circuit generates sinusoidal signals that depend on the input oscillator. The circuit is from a Radio Elecrtronics from April 1988. The signals are in the range of a few hundred kilohertz.
This field effect transistor amplifier circuit in common gate or common port configuration is from an old...
I found this simple circuit from an English magazine from 1984. The circuit can be easily...
This circuit shows how to get 5 V under low current from an operating amplifier 741. I got this...