Found in an EDN from the 90s, this circuit has a distortion of only 0.003%. Capacitors and double potentiometer determine the frequency.
This circuit allows the detection of RF signals using the lowest range of direct currents of a...
The MC496 integrated circuit used in this application is not common today. Motorola's circuit...
This window comparator circuit was found in a Popular Electronics from the 90s. The circuit has a...