This circuit is from a 1980s Signetics documentation. The circuit separates the modulation signal from a carrier. The used components are not common today.
This circuit is from a 1976 documentation. It makes use of isolated gate MOSFET which is already very...
This setting appears multiple times on the site from different sources. This is from a 2000 manual...
This circuit uses a current regulator from the 90's. This component is uncommon nowadays. The...