FreeLists / si-list / [SI-LIST] Diff signals

[snsrao sns <rao_silist@xxxxxxxxxxx>]

Hi,
   
  Have any one worked on Crosstalk analysis for broadside coupled traces. We 
have broadside traces routed in a dual stripline configuration with spacing to 
adjacent ground plane being 7.9 mils. The stack structure is as below.
   
  ----------------------------- Plane (7.9)
  +    +    +                                 
  -     -     -
  ----------------------------- Plane (7.9)
   
  The dielectric height between + and - signal layers is also 7.9 mils.
   
  The trace width is 4 mils and if we have followed 3W rule with adjacent 
signals. The signals are running above 300 Mhz and the length is around 4 
inches. The signalling topology is LVDS.
   
  I would like to know as how to model broadside traces for crosstalk analysis. 
Does the conventional formula DV/1+(D/H)^2 works? Or it requires a detailed 
analysis to be done using SI tools. Any inputs or feedback on the same will 
help.
   
   
   
                                
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