Resonance Frequency of Circuit Involving Multiple Inductors

AI Thread Summary
The discussion centers on calculating the resonance frequency of a circuit with two inductors and a capacitor in series. The user questions whether the formula L1 + L2 + k√(L1*L2) is applicable due to the inductors being separated by a capacitor. It is noted that if there is no coupling between the inductors, they can be treated as impedances in series, leading to a straightforward addition of their inductances. The need for a different formula arises if the inductors are coupled, which would require considering their mutual inductance. Understanding the coupling effect is crucial for accurate resonance frequency calculations in this circuit configuration.
Fischer777
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I have two inductors and a capacitor in series, in the order of inductor, capacitor, inductor. I'm not sure if the equation L1+L2+k*√(L1*L2) will work in this case or not, given the inductors are separated (or offset) electrically from each other by a capacitor. So I guess my question is, can the formula for calculating effective inductance be used in this situation, or will I need a different formula?
 
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If there is no coupling between the inductors, then inductors in series simply add. (You treat the problem as impedances in series.)
 
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