[SI-LIST] Re: Proximity effect and the HSPICE w-element field solver
- From: Scott McMorrow <scott@xxxxxxxxxxxxxxxx>
- To: chris.h.simon@xxxxxxxxx
- Date: Wed, 19 Sep 2001 07:13:28 -0700
Chris,
The new version of the field solver in HSPICE 2001.2 does correctly
include all effects. Just remember that your dielectric material, FR4,
is not as accurate as your field solver.
scott
--
Scott McMorrow
Principal Engineer
SiQual, Signal Quality Engineering
18735 SW Boones Ferry Road
Tualatin, OR 97062-3090
(503) 885-1231
http://www.siqual.com
chris.h.simon@xxxxxxxxx wrote:
> I have searched the SI-LIST archives and actually came across a thread
> on the HSPICE w-element field solver from June of this year.
> Unfortunately the responses in the thread did not address the original
> question. (They did, however give lots of useful information on
> dielectric loss of FR-4)
>
> At any rate I am beginning a system design which will use 2.5 Gbit/sec
> differential signalling with Infiniband type of signal
> characteristics. My question is whether the HSPICE internal field
> solver (which I have not yet used) includes the effects of proximity
> of differential lines when it calculates the line losses. I assume
> that when two PWB traces are "tightly coupled" as has been discussed
> in this forum, the currents in the traces at high frequencies crowd
> towards the surface due to skin effect AND crowd towards the near
> edges of the traces due to proximity effect. Does anyone know of any
> good resources that specifically discuss the proximity effect at GHz
> frequencies? I would think that for signal edge rates on the order of
> 50 ps this could have a profound effect on losses.
>
> Several years ago I used a tool called SIMIAN out of U Texas which I
> believed included proximity effect. If the HSPICE field solver does
> not include these effects does anyone know of another tool which does?
>
> Chris
>
> <>-<>--<>----<>------<>--------<>--------<>--------<>------<>----<>--<>-<>
> Chris Simon chris.h.simon@xxxxxxxxx
> General Dynamics Information Systems
>
> To an optimist, it's half full.
> To a pessimist, it's half empty.
> To an engineer, it's twice as large as necessary.
> <>-<>--<>----<>------<>--------<>--------<>--------<>------<>----<>--<>-<>
>
> ------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
> or to administer your membership from a web page, go to:
> //www.freelists.org/webpage/si-list
>
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
> List archives are viewable at:
> //www.freelists.org/archives/si-list
> or at our remote archives:
> http://groups.yahoo.com/group/si-list/messages
> Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
>
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts: