This circuit uses a dual-gate MOSFET, a rare component today. We found it in American documentation from the 1980s. The rest of the components are common.
This 2-CK722 oscillator was found in a march 1961 Radio Electronics Magazine. The circuits need...
This crystal oscillator is indicated for the calibration of IF steps of common radio receivers. The...
We find this simple circuit in an English publication called Electronic Circuit Design on spring 3 of...