This circuit was found in the January 1991 issue of Radio Electronics magazine. The circuit uses integrated circuits of the time and the coils depend on the tuned bands.
This beat frequency oscillator or BFO was found in an American 1980s documentation. The circuit is...
This circuit is from the 1990 Motorola Linear Databook. The circuit can be implemented with other...
In the figure we have the simple way of controlling a load or having a signal from an optical...