FreeLists / si-list / [SI-LIST] Re: Differential pair via modeling

[Ivan Ndip <ndip@xxxxxxxxxxxxxxxxx>]

Hi Doug,
here are some papers on  differential via modeling.

Laermans, E., De Geest, J., et al.,"*Modeling Differential Via Holes",* 
IEEE Topical Meeting on Electrical Performance of Electronic 
Packaging, pp. 127-130, October 2000.

Abhari, R., Eleftheriades, G.V., van Deventer-Perkins, E., "*Analysis of 
Differential Vias in a Multilayer Parallel Plate Environment Using a 
Physics-Based CAD Model",*  2001 IEEE MTT-S, Volume 3, pp. 2031-2034.

Chen Wang, Jun Fan et al.,"*The Effects of Via Transitions on 
Differential Signals",* IEEE Topical Meeting on Electrical Performance 
of Electronic Packaging, pp. 39-42,  October  2001.

Best regards,

Ivan Ndip


Doug Hopperstad wrote:

>Hi all,
>I am looking for some information on differential via modeling. The
>differential nets travel through via holes between non-adjacent layers.
>A return stitch is typically placed near the layer jump via to provide a
>return path for single-ended nets. With differential pairs, the
>common-mode signal would need a return path but I am not finding any
>information on how to calculate the anti-pad size, placement of the vias
>and return stitch for differential nets.=20
>
>I have been reading Howard Johnson's latest book on via modeling but it
>only talks about single-ended vias.=20
>
>Can someone provide a good reference source on this issue, thanks.
>
>Doug Hopperstad
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