We found this circuit in the Linear Applications Handbook by National Semiconductor. The circuit is from 1994, but it can be made with more modern equivalent components.
This circuit was found in a 1967 US documentation. The circuit applies to modern general purpose...
This is an interesting idea that we found in the May 1971 issue of Radio Electronics magazine. It can...
The frequency range of this circuit depends on the transistors used. The circuit is from a Radio...