This circuit is from a 1980s Signetics documentation. The circuit separates the modulation signal from a carrier. The used components are not common today.
Found in documentation from the 1990s, this circuit drives an SCR with a delay that depends on C1...
This circuit is from a documentation from the 70s, but it can be assembled with a TIP32 transistor in an...
This circuit was found in the September 1984 issue of Radio Electronics magazine. The circuit is...