This circuit was found in a 303 Circuits issue of Elektor magazine from the 1990s. The circuit uses an equivalent operating system. The source is not symmetrical.
This circuit shows how to implement a negative resistance device with an operational amplifier. The...
This fast Schmitt trigger operates at frequencies from 10 Hz to 100 Hz, with very short rise time....
This circuit detects the presence of strong signals from spy transmitters, enabling their...