This circuit was found in the August 1994 issue of Electronics Now magazine. The 4046 is uncommon these days and the frequency range is given by C1.
This circuit was found in the March 1997 Electronics Now magazine. It uses a common analog...
This tunnel diode circuit was found in American documentation from 1966. The tunnel diode is the...
This circuit was found in the comparator's own documentation, serving others in the same series. The...