How to find the Q of a network?

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lionel_lei

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Hi, if I have a network consist of (R+sL) in parallel with C, how do I find the Q of the network.

Obviously there are many way to calculate it. One way is to use the definition of Q which is energy stored divided by energy loss. But is there any intuitive way to calcualte it? Suppose the network is a black box, what you have access is the input and output V, I, and Z, can you calculate the Q?

This is an interview question I encounterred that bothers me.

Thanks for any suggestions.

Lionel
 

Re: Q of a network?

If you can measure forexample the Y-Z-parameters then you can express the Q as: Q=Imag(1/Y11)/Real(1/Y11)=Imag(Z11)/Real(Z11).

But as you state yourself: "One way is to use the definition of Q which is energy stored divided by energy loss.", this is the way to do it.

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    lionel_lei

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Re: Q of a network?

Thanks, that works.
 

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