Hartley oscillator
Schematic Diagram
The Hartley oscillator is an LC electronic oscillator that derives its feedback from a tapped coil and is varied in frequency by a variable capacitor. A Hartley oscillator is therefore a type of inductively coupled variable frequency oscillator.
Hartley oscillators may be series or shunt fed.
Structure:
- One centre tapped inductor.
- One tuning capacitor.
Advantages:
- Frequency simply varied by capacity net value in the tank circuit.
- Output amplitude remains constant (over the frequency range).
- Feedback ratio of inductor 1 to inductor 2 remains constant.
Disadvantages:
- Harmonic content rich.
- Not suitable for a pure sine wave.
See also:
Colpitts oscillator |
Clapp oscillator |
Vackar oscillator |
Armstrong oscillator
External links, references, resources
