This 80's Exar circuit has a carrier detector for frequencies up to 500 kHz. The circuit uses a company 567 which is still a common component.
We found this circuit in an American 1980s documentation. Other comparators can be used and the...
Employing transistors of the time, this circuit was found in a documentation from 1963. The coils...
This circuit was found in a 1980s instrumentation publication and can be applied to virtually any...