Re: [SI-LIST] : skin effect

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From: GARY ROSEN (gmr@appsig.com)
Date: Sat Sep 02 2000 - 15:01:38 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.

- Gary Rosen



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