This circuit serves as a reference for the components used and the time. The circuit is from 1967 RCA documentation. MOSFETs from that time are used.
This sensitive voltage measuring circuit has a very high input resistance, of the order of Mohms,...
This circuit was found in 2003 documentation, but all components used are still current. The alarm...
This circuit, which operates with frequency up to a few tens of megahertz, is from a 1976...