This circuit is from a 1967 documentation. It makes use of varicap and diode tunnel in addition to currently uncommon FET. It serves as a reference.
To be used in analog computing, this circuit outputs the difference between the values of the...
This detector with ultra-low deviation was found in an American documentation from the 90s....
This 1 MHz oscillator was found in the February 1992 issue of Radio Electronics magazine. The...