FreeLists / si-list / [SI-LIST] Re: HSPICE W element field solver model

[greg kimball <gkimball@xxxxxxxxx>]

ALL-
YES, THIS IS TRUE!!
There are server timouts of around 5mins or so,
that can limit transfer of large files. MAIL was designed for small text
messages. I just had to call my provider and have them blow the two
files away.
Thanks,
Greg

Mark Alexander wrote:

> Michael,
>
> In the future, please DO NOT send large attachments with your emails.  It's
> better to put it on a server and give a url in the email, or specify that 
> people
> contact you to have it emailed to them directly.  Some of us access email
> through dialup.
>
> thanks,
> mark
>
> "Greim, Michael" wrote:
>
> > Here is something on materials from AMP that
> > may prove interesting...
> >
> > See attached....
> >
> > Best Regards,
> >
> > Michael C. Greim                 Sonus Networks
> > mgreim@xxxxxxxxxxxx        978-589-8336
> >
> > Making the world safe for digital signals everywhere
> >
> > And all this science I don't understand
> > It's just my job six days a week
> >
> > The time is gone. The email's over
> > Thought I'd something more to say......
> >
> > -----Original Message-----
> > From: Alex Horvath [mailto:alexh@xxxxxxxxxxxxxxxx]
> > Sent: Friday, June 08, 2001 1:31 PM
> > To: si-list@xxxxxxxxxxxxx
> > Subject: [SI-LIST] Re: HSPICE W element field solver model
> >
> > Chris,
> > I found your statements below very interesting because we have a consultant
> > working for us that's telling us 3 gig on a FR-4 backplane (20") is no big
> > deal. I told him I had some concerns based on the chip manufacturers data
> > which recommended GETEK or similar. Do any simulators take losses into
> > account?
> >
> > Are there any publications or papers that discuss in more detail the DK and
> > loss tan you mentioned below? This is the first time I have worked at
> > frequencies where this is a concern.
> >
> > Thanks,  Alex H
> >
> > -----Original Message-----
> > From: si-list-bounce@xxxxxxxxxxxxx
> > [mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Chris Mesibov
> > Sent: Friday, June 08, 2001 4:58 AM
> > To: si-list@xxxxxxxxxxxxx
> > Subject: [SI-LIST] Re: HSPICE W element field solver model
> >
> > Most PCB fabricators and their lamenate suppliers don't characterize FR4
> > above
> > 1.5 GHz (i.e. for DK and loss tan).  Therefore specifying controlled
> > impedance
> > lines intended for this bandwidth should be rejected by any fab house worth
> > their salt.
> > The problem is that the studies of FR4 at frequencies up to 10Ghz show
> > dramatic
> > changes in loss tan and DK over freq and temp.  What this would result in
> > for
> > digital signals is group delay and rise time degradation.  Group delay is
> > when
> > the fourier components of the waveform propagate down the transmission line
> > at
> > different rates.  The rise time degrades because as the frequency increases,
> > so
> > does the loss tangent.  This has the effect of attenuating the harmonics of
> > the
> > waveform, thus slowing the rise time.
> >
> > Hope this sheds some light.
> >
> > Chris
> >
> > Alex March wrote:
> >
> > >   Dear SI experts,
> > >
> > >   I would like to ask about your experiences with the
> > > W element field solver model in HSPICE. I am trying to
> > > make some simulations in the Gigahertz range with FR4
> > > material and I am not sure about what value I should
> > > use for the conductivity of FR4.
> > >
> > > Thank you,
> > >
> > > Alex
> > >
> > >
> > > __________________________________________________
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> >
> > --
> >  Chris Mesibov
> >  Sr. Hardware Engineer Fujitsu Network Communications, Inc.
> >  Phone:(845)731-2037   2 Blue Hill Plaza, 6th Floor
> >  Fax:  (845)731-2011   Pearl River, NY 10965
> >
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> >
> >   --------------------------------------------------
> >                    Name: amp_5gig.pdf
> >    amp_5gig.pdf    Type: Acrobat (application/pdf)
> >                Encoding: base64
> >
> >                                    Name: amp_high_speed_materials.pdf
> >    amp_high_speed_materials.pdf    Type: Acrobat (application/pdf)
> >                                Encoding: base64
>
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