Hartley Oscillator
by Ahmadfarid Ahmadfarid
1. An electronic oscillator circuit that uses an inductor and capacitor in parallel to determine frequency.
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2. A Hartley oscillator is essentially any configuration that uses two series-connected coils and a single capacitor (see Colpitts oscillator for the equivalent oscillator using two capacitors and one coil). Although there is no requirement for there to be mutual coupling between the two coil segments, the circuit is usually
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4. Advantages of the Hartley oscillator include: • The frequency may be adjusted using a single variable capacitor • The output amplitude remains constant over the frequency range • Either a tapped coil or two fixed inductors are needed Disadvantages include: • Harmonic-rich content if taken from the amplifier and not directly from the LC circuit.
