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define parasitic fringing capacitance

Question asked by labdevo on Sep 22, 2015
Latest reply on Oct 2, 2015 by Dr_joel
Hi :)

I have a question about how to define the parasitic capacitance.
In the following Paper it is described on page 10 how it works:

I don't really understand how it works. In the first Method they write: "Measure the phase response of the open and solve
for the capacitance function."
Did the mean the equation Ceff? And how I find out the Coefficients C0 to C3 for the cubic polynomial?
Has anybody an idea how it works?
Thank you very much in advance.