This circuit, which can be built with several CMOS gates, was found in the March 1996 issue of Electronics Now magazine. The circuit has the base frequency determined by R1 and C1.
The circuit shown in the figure is suggested by National Semiconductor and makes use of an...
This circuit, suitable for tube equipment, was found in an old documentation. It uses a high...
This circuit is part of an integrated circuit tester published in an article in Radio Electronics...