Tuned Circuit Example 1

In this parallel LC tuned circuit, the coil value is 100 µH, and the variable capacitor has a range of 20 pF to 500 pF. You have to find the value of the tuning capacitor C required to receive a carrier frequency of 909 kHz

You need to use the resonance formula and transpose it for C. Another page of this multi-page article shows how. You simply plug in the values you have to find the capacitance C.

Here is the previously transposed resonance formula to find capacitance.

f=909000 Hz, L=100 µH

I decided to do it the long way to keep it simple!

It is better to give the answer in picofarads.

Tuned Circuit Articles