Discussion
What distinguishes a Colpitts oscillator?
Answer: D
A Colpitts uses two capacitors in series across the inductor, with the feedback taken from their junction, so their ratio sets the feedback fraction. The tapped inductor is the Hartley. It is easier to make two good capacitors than one accurately tapped inductor, which is why the Colpitts is by far the more common of the two in modern equipment and why it adapts so readily to integrated form.
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