Re: [SI-LIST] : skin effect

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From: Doug ([email protected])
Date: Sat Sep 02 2000 - 18:23:10 PDT

> Sunil Kumar wrote:
> > I would like to make one more point. In digital environment, an edge is
> > made up of various frequency components, the highest is given by 0.35/rise
> > time. Now higher the frequency, lower will be the skin depth, that means
> > skin resistance will be higher. Hence skin effect acts like a low pass
> > filter, rise time will increase. Any comments?
> >
> > Sunil
> >
> Not taking into account transmission line effects (i. e. propagation
> delay), I think this effect would be small if the trace resistance
> is << line impedance. I'm not sure of the magnitude of the
> transmission line effects, i. e. dispersion caused by varying
> wave velocity over frequency.

< nod >
A "filter" would have to include at least one energy
storing component and do a variety of phase adjustments.
Resistance all by itself would affect only amplitude.

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