We found this circuit in the August 1994 issue of Electronics Now magazine. The circuit is based on the now uncommon CMOS 4046. The frequency range is given by C1.
This configuration was obtained in a 1977 FET Databook. The circuit can be practically any JFET...
The integrated circuit used in this regulator is not very common today. The circuit is from old...
The operational used is uncommon today, but equivalents can be used. Unlike the previous one, this...