Editing Hartley oscillator (section)

{{short description|Electronic oscillator}}
The '''Hartley oscillator''' is an [[electronic oscillator]] [[electronic circuit|circuit]] in which the oscillation frequency is determined by a [[tuned circuit]] consisting of [[capacitor]]s and [[inductor]]s, that is, an [[LC circuit|LC]] oscillator.  The circuit was invented in 1915 by American engineer [[Ralph Hartley]]. The distinguishing feature of the Hartley oscillator is that the tuned circuit consists of a single capacitor [[in parallel]] with two inductors [[in series]] (or a single tapped inductor), and the [[feedback]] signal needed for oscillation is taken from the center connection of the two inductors.