[SI-LIST] Re: How to simulate length mismatch of PCB traces

Hi, Ihsan

It is appreciated if you can give me a reference
where I can find the ladder circuit or U-element
addressing this mismatch issue.

adiu


On Thu, 30 Mar 2006, Ihsan Erdin wrote:

> The question implies that the mutual coupling between the lines be included
> otherwise the solution is trivial. If the length difference is short
> cascading a w-element is not a good solution. Indeed the w-element for
> electrically short lines should be avoided at all times. A quick and dirty
> way is to make a ladder circuit or use a U-element (if anybody can remember
> that...) to account for the length difference.
> Regards
> 
> Ihsan
> 
> 
> On 3/29/06, YongJin CHOI <yc2158@xxxxxxxxx> wrote:
> >
> > Dear SI members,
> > I am looking for a simple simulation method to get a
> > rough idea if one or two of the four traces is a
> > little bit longer like 1~2mm. The transmission line
> > models I am having are W-model from Hspice field
> > solver(2-D) and S-parameter model from HFSS. I can use
> > Hspice or Spectre depending on the simplicity.
> > Any comments would be appreciated.
> > Thanks,
> >
> > Yongjin CHOI
> >
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