The idea of this circuit found in a Radio Electronics from January 1966. The idea of the circuit is to improve the reception of audio signals, mainly telegraphy, working as a filter.
The 50 kHz signal generated by this circuit is applied to a low impedance inductive transducer. A...
This circuit can also use other series operational amplifiers such as MC33172, MC33174, MC35171,...
This circuit was found in an Analog Devices publication from the 1990s. The circuit performs input...