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Modeling >> Behavioral Models >> Modelling of frequency-dependent resistor (ferrit choke)
https://designers-guide.org/forum/YaBB.pl?num=1231227836

Message started by Berti on Jan 5^th, 2009, 11:43pm

Title: Modelling of frequency-dependent resistor (ferrit choke)
Post by Berti on Jan 5^th, 2009, 11:43pm

Hi,

I need to model a frequency-dependent resistor (phase should be relatively constant) - basically a ferrit choke. How can I do that in spectre/veriloga? A combination of R-L-C elements doesn't work since this doesn't result in a constant phase?

Any ideas?

Regards

Title: Re: Modelling of frequency-dependent resistor (ferrit choke)
Post by ACWWong on Jan 6^th, 2009, 12:55am

Maybe this piece on skin effect (resistance varying with sqrt(freq) in this case) will help ?
http://www.designers-guide.org/Modeling/ind.pdf

Title: Re: Modelling of frequency-dependent resistor (ferrit choke)
Post by Berti on Jan 6^th, 2009, 6:49am

Cool, thanks a lot! That's what I was looking for.

Cheers