Colpitts Oscillator

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The Colpitts oscillator is an oscillator topology noted for using a capacitive voltage divider.

Image:colpitts.png


[edit] Choosing frequency

The frequency that the oscillator will run at is given by:

f_0 = {1 \over 2 \pi \sqrt {L \cdot \left ({ C_1 \cdot C_2 \over C_1 + C_2 }\right ) }}

Reactance sheets are available which provide a chart of inductance and capacitance, and the frequency they will resonate at.

[edit] further reading

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