This circuit was found in the August 1996 Electronics Now magazine. The circuit is based on an operational circuit whose type determines the gains and limits for the frequency.
This circuit was found in a Radio Electronics issue from May 1989. Please note that it may not...
The circuit in the figure is very interesting because it simulates an SCR triggered by light. When...
The circuit shown is a suggestion by National Semiconductor in its 1994 Linear Applications...