Series parallel LC tank circuit Resonant Frequency equation?

AI Thread Summary
To calculate the resonant frequency of a series-parallel LC circuit, the total inductance of inductors in parallel is found by adding their reciprocals and then taking the reciprocal of that sum. Conversely, the total capacitance of capacitors in series is calculated by adding their reciprocals as well. The user initially attempted to sum the values directly, which is incorrect for this configuration. A visual representation of the circuit can aid in understanding the connections. Accurate calculations are essential for determining the resonant frequency in such circuits.
bitencrypt
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Hi

How would I calculate a series-parallel LC circuit for resonance? I added up all the μH and pF for the equation, would that be correct? The inductors are in parallel, and the capacitors in series.
 
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bitencrypt said:
Hi

How would I calculate a series-parallel LC circuit for resonance? I added up all the μH and pF for the equation, would that be correct? The inductors are in parallel, and the capacitors in series.

Welcome to the PF.

Can you post a drawing of the circuit, along with whatever is driving it?

Inductors in parallel and capacitors in series do not add linearly...
 
You could look here:
https://en.m.wikipedia.org/wiki/Series_and_parallel_circuits

You will see that the total inductance of inductors in parallel is calculated by adding their reciprocals, and then taking the reciprocal of that, just like resistors.

The capacitance of capacitors in series is calculated the same way
 


Here is the circuit. 1 element is 2 inductors and 2 capacitors, they are connected together
 
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