A Colpitts oscillator, named after its inventor Edwin H. Colpitts,[1] is one of a number of designs for electronic oscillator circuits using the combination of an inductance (L) with a capacitor (C) for frequency determination, thus also called LC oscillator. The distinguishing feature of the Colpitts circuit is that the feedback signal is taken from a voltage divider made by two capacitors in series. One of the key features of this type of oscillator is its simplicity (needs only a single inductor) and robustness. The left picture shows the schematic as used in the first publication. Colpitts obtained US Patent 1624537 for this circuit.
The frequency is generally determined by the inductor and the two capacitors at the bottom of the drawing.
The frequency is generally determined by the inductor and the two capacitors at the bottom of the drawing.
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