[SI-LIST] Re: Ground vias around signal via
- From: "Bert Simonovich" <bertsimonovich@xxxxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Wed, 15 Oct 2014 17:24:44 -0400
For a pair of vias driven differentially, the addition of stitching via(s)
provide a path for common signal to return. Here is a link to a DesignCon
paper, "Effects of Nearby Ground Vias on
High Speed Single-ended and Differential Signals"
http://e.ubmelectronics.com/images/DesignCon2014/12-WA2_Paper_EffectofNearby
GroundVia.pdf
Bert Simonovich
Backplane Specialist and Founder
LAMSIM Enterprises Inc.
http://lamsimenterprises.com
>
> -----Original Message-----
> From: Aaditya K
> Sent: Wednesday, October 15, 2014 10:41 AM
> To: si-list
> Subject: [SI-LIST] Ground vias around signal via
>
> Hello Experts,
> I have a question on ground vias placement around signal via.
>
> My opinion is, if we have a proper return path, they are not
> necessary. Am I correct?
>
> Any situations they are useful other than shielding?
>
> How will they help? When do we need them?
>
> Please help.
>
> Thanks
> Aaditya
>
>
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