This circuit was found in the April 1993 Electronics Now magazine. With it, it is possible to control the gain of an operational circuit with a JFET.
August 2016 - It can be obtained from Mouser Electronics Mikromidia of the MikroElektronika...
This transistorized oscillator, a modification of the Colpitts oscillator, was found in the...
This oscillator that operates at 80 kHz was found in the July 1993 issue of Electronics Now...