In the figure we have a good rectangular signals generator with several frequency bands. The circuit is based on old logic but can be implemented with modern equivalents.
This circuit is from the 1983 Intersil Databook. This is a configuration that is still used today...
This shield circuit, from a documentation from the 70s, employs an optocoupler with two SCRs to...
We found this circuit in the 1982 SGS Linear Integrated Circuits manual. The integrated circuit used...