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 an Electronic Design from the 90's, this circuit supplies voltages according to the...
This simple two-transistor circuit used transistors from the 60s, having been found in a...
The circuit shown, found in French documentation from the 1970s, functions as a variable...