Colpitts Oscillator Calculator

Colpitts Tank Circuit

This Colpitts calculator will compute the values of C1 and C2, providing you supply the oscillator frequency, inductance value of the coil (L), and beta. The feedback ratio is usually 1:10, therefore beta is usually 0.1. The default values are for an oscillator frequency of 1 MHz, and coil inductance of 10 µH. In the second part, if you provide the DC resistance of the coil, then it will also compute the quality factor Q.


Circuit Parameters

Frequency (Hz)


Coil Inductance (H)


Beta




Calculated Parameters

Total Capacitance (F)


C1 (F)


C2 (F)


Calculate Quality Factor

Coil DC Resistance (Ω)





Q Value



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