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OrcaD Capture : How to simulate frequency dependent resistor

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Meryl

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Cc everyone

Please, I want to know how to simulate a frequency dependent resistor , the problem is that I don't know how to write the equation of the resistor, and where, here is the equation of my component R, it is for an electrical modeling purpose:

R = sqrt((R_ac)^2 + (R_dc)^2);

and R_ac = a/ ((b*Skin) - (pi*(Skin^2))) ;
R_dc = 5.94e-4;
a=1.68e-12 , b = 1.884e-4;
the variable skin that represent the skin effect that occurs to a resistance at high frequency: Skin = 1./sqrt(pi*freq*5.9524e7)


Best regards
Thanks
 

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