Calculating resonant frequency
المؤلف:
Stan Gibilisco
المصدر:
Teach Yourself Electricity and Electronics
الجزء والصفحة:
319
3-5-2021
1971
Calculating resonant frequency
The formula for calculating resonant frequency fo, in terms of the inductance L in henrys and the capacitance C in farads, is
The 1/2 power is the square root.
If you know L and C in henrys and farads, and you want to find fo, do these calculations in this order: First, find the product LC, then take the square root, then divide 0.159 by this value. The result is fo in hertz.
The formula will also work to find fo in megahertz (MHz), when L is given in microhenrys (μH) and C is in microfarads (μF). These values are far more common than hertz, henrys, and farads in electronic circuits. Just remember that millions of hertz go with millionths of henrys and millionths of farads.
This formula works for both series-resonant and parallel-resonant RLC circuits.
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