Traditionally, tuning RF oscillator circuits has been a function of an adjustable capacitor. But capacitance is only part of the circuit, with inductance being the other important portion.

We’ll start off with one oscillator (yawn!) and then turn it into something much more interesting really quickly. Making this circuit playable takes a little more experimentation, but that’s ...

In a superheterodyne radio, a local oscillator is an electronic circuit that generates a frequency based on the desired channel. The output of the oscillator is the channel frequency typically ...