This circuit with a dual power supply generates sinusoidal, triangular and rectangular signals. We found it in the magazine Electronics Now of January 1996. The frequency goes up to a few megahertz.
This 1997 documentation circuit was originally created for use with Camcorder type video cameras....
This circuit was found in a 1968’s publication and uses germanium transistors. The characteristic...
This simple circuit was found in a 2001 documentation. With each touch of CH1, a 4017 output...