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 was found in a publication of1994, originally obtained from the National...
This circuit was found in a 1977 Radio Shack documentation. The circuit is TTL, which must be...
This circuit was found in an American 1980s documentation. It analyzes the exhaust gas of a...