The integrated circuit used in this Electronics Now amplifier is not very common today. However, this configuration can be found in commercial equipment of the time.
This circuit, which appears at other points on this site, can be designed with both 4011 and 4001...
This traditional SCR flip-flop configuration is from an American publication from the 1970s. The...
This circuit is from a 1980s Signetics documentation. The circuit separates the modulation signal from a...