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 is recommended for alarm systems since it has a good output stage. The circuit is...
) Suggested by Philips in a 1968 documentation this circuit has very high 10 ohm on-load voltage...
No information is given about the transformers in this circuit suggested by Motorola in a 1968...