[SI-LIST] Re: How to simulate length mismatch of PCB traces
- From: "Ihsan Erdin" <erdinih@xxxxxxxxx>
- To: yc2158@xxxxxxxxx
- Date: Thu, 30 Mar 2006 13:21:34 -0500
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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