This low frequency circuit was found in documentation from the 1980s. The values of R and C determine the frequency. Inverters can also be designed with logic gates.
This circuit was obtained from the Encyclopedia of Electronic Circuits volume 5 of 1995. The...
This circuit is suggested by Sanyo and is based on the integrated circuit LA4430, manufactured by it. With a...
This automotive grade circuit was found in a 1991 Electronics Hobbyist. The transistors are...