hartley oscillator

The Hartley oscillator is an L C electronic oscillator that derives its feedback from a tapped coil in parallel with a capacitor (the tank circuit). A Hartley oscillator is therefore a type of inductively coupled variable frequency oscillator. Hartley oscillators may be series or shunt fed. Structure:

One center-tapped inductor

One tuning capacitor

Advantages:

Frequency varied using a variable capacitor

Output amplitude remains constant over the frequency range

Feedback ratio of tapped inductor remains constant

Disadvantages:

Harmonic-rich content

Not suitable for a pure sine wave

See also: Colpitts oscillator | Clapp oscillator | Vackar oscillator | Armstrong oscillator

External links, references, resources

Integrated Publishing's Hartley oscillator

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