[SI-LIST] Re: PCB Gnd discontinuity on simulation software
- From: Gregory Fitzgerald <gpfitzgerald2000@xxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx, steve weir <weirsi@xxxxxxxxxx>
- Date: Wed, 7 Mar 2012 14:34:19 -0800 (PST)
Ettore:
As a consultant, I have worked with some clients that had access to new FAST
2.5D solvers that accurately account for the situation mentioned below (signals
crossing over split planes). Unfortunately, this work was under an NDA so I
cannot provide more information. What I can state is that the products are
from a ~3 year old new start up that is working with a few, large teaching
customers before they roll out a product to the mass market.
Product was a little immature but was quickly maturing into a full SI/PI
platform. It is different and better approach to current products on the
market.
Greg
--- On Fri, 2/24/12, steve weir <weirsi@xxxxxxxxxx> wrote:
From: steve weir <weirsi@xxxxxxxxxx>
Subject: [SI-LIST] Re: PCB Gnd discontinuity on simulation software
To: si-list@xxxxxxxxxxxxx
Date: Friday, February 24, 2012, 7:30 AM
Ettore, your picture did not come through as the SI-list does not
support attachments.
I do not believe that present versions of Hyperlynx account for signals
crossing plane splits. If I am wrong, I am sure the Mentor guys will
chime in. In order to evaluate those kinds of effects accurately, a
full-wave solver is the best way to go. However, I will tell you right
now that you don't need a full wave tool to accurately predict that you
are setting yourself up for EMI headaches by introducing such a
discontinuity. You should really do what you can to maintain a
contiguous transmission path.
Steve.
On 2/24/2012 2:29 AM, ruscino wrote:
> Content-Type: text/plain; charset=ISO-8859-15; format=flowed
> Content-Transfer-Encoding: 7bit
> Hi all, in my circuit there are lvds nets that are on gnd shape
> (microstrip topology).
> These nets crossing also a circuit area where there is not the gnd shape.
> When I simulate this circuit on simulation software like Hyperlynx
> take the software into account this gnd discontinuity?
> See the picture in attach, please.
>
> Thanks a lot
> Ettore
>
>
>
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