[SI-LIST] Re: S-Parameter model interpretation.
- From: Surjendra Goswami <goswamisurjendra@xxxxxxxxx>
- Date: Fri, 13 Feb 2015 19:00:55 +0530
Hi Karthik,
Return loss qualification criteria is mentioned in the standard
specification.
As regarding the way to modify layout to meet the insertion and the return
loss specification, the answer lies in the definition of the s-parameters.
In case insertion loss specs of the extracted data is higher than spec you
need to bring the trace losses down i.e. decrease trace losses which can be
done through decreasing trace length or using lower loss material etc.
In case return loss specs of the extracted data is higher than spec you
need to match the impedance better.
I think the above guidelines might not be too specific but I hope that
gives a pointer.
Regards
Surjendra
On Fri, Feb 13, 2015 at 5:58 PM, Karthik P <dmarc-noreply@xxxxxxxxxxxxx>
wrote:
> Hi All, Am running s-parameter model extraction for IC Packages.I have
> defined the port b/w Die Pin and Pkg Pin. It is for PCIE 2.0
> Results helps to find out return loss, insertion loss and Xtalk of each
> Tx/Rx pair
> Now the query is, how to find the results are meeting the spec or failing?
> If it is failing, what recommendation should be given to the Layout
> Engineers. That too esp for Insertion loss? and return loss..
> Would appreciate kind response from you guys.
> Thanks
> RegardsKar
>
>
>
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