Re: [SI-LIST] : Anyone doing SI simulations for Pentium

Todd Westerhoff (toddw@cadence.com)
Fri, 10 Sep 1999 09:26:12 -0400

Oops. Scott is absolutely right. It's Len, not L, that specifies length.

That's what I get for writing email too late at night!

Thanks, Scott!

Todd.

At 06:52 PM 9/9/1999 -0700, you wrote:
>All,
>
>Todd ment to say:
>
>"Everything with Len=0 is a lumped value, while everything with a nonzero
>Len is actually being modeled as a transmission line."
>
>Regards,
>
>scott
>
>
>Todd Westerhoff wrote:
>
>> Everything with L=0 is a lumped value, while everything with a nonzero L is
>> actually being modeled as a lossless transmission line.
>> .
>>
>> At 12:41 PM 9/8/1999 -0700, you wrote:
>> >I face the following puzzle in running a signal integrity
>> >simulation on Pentium II board. I'm using SpecctraQuest
>> >and Signoise, in case this matters.
>> >
>> >I have a Pentium II IBIS model (which I converted to Cadence's
>> >.dml format). This model appears to model all the parasitics
>> >of the Slot 1 board in a lumped manner; I presume that the
>> >model includes parasitics up to the edge fingers. (Does anyone
>> >know different?)
>> >
>> >I also have a model of a Slot 1 connector in SPICE format. Quite
>> >aside from issues of how this model is to be used (I'm trying to
>> >get the answer to that from the supplier) is the issue of how to
>> >include the Slot 1 connector parasitics in the simulation. At
>> >first, I thought I could use a design link and treat the connector
>> >as a cable connecting the main board and the Slot 1 module, but I
>> >think that requires that I have the "board layout" of the Pentium
>> >module. The next thought was to treat the connector as a package, but
>> >this doesn't work since the Pentium II module is already a package
>> >model. So I'm left with adding the connector parasitics in some
>> >fashion to the existing Pentium II model. I just want to check
>> >that this is in fact the correct approach, or else find out whether
>> >I'm giving up too soon on one of the first two approaches mentioned,
>> >or whether there's another approach I haven't considered.
>> >
>> >I'm sure I'm not the only one facing this, so how are others
>> >solving it?
>> >
>> >
>> >--
>> >Kim Helliwell
>> >Senior CAE Engineer
>> >Acuson Corporation
>> >Phone: 650 694 5030 FAX: 650 943 7260
>> >
>> >**** To unsubscribe from si-list: send e-mail to
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>> >
>> >
>> >
>>
>> Todd Westerhoff
>> Technical Marketing Director | High Speed Systems Design | Performance
>> Engineering
>> Cadence Design Systems | 270 Billerica Road | Chelmsford, MA 01824
>>
>> ph: (978) 262-6327
>> fx: (978) 446-6798
>> email: toddw@cadence.com
>> internal information website: http://www-ma.cadence.com/~toddw
>>
>> **** To unsubscribe from si-list: send e-mail to
majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE
si-list, for more help, put HELP. si-list archives are accessible at
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>
>--
>Scott McMorrow
>Principal Engineer
>SiQual, Signal Quality Engineering
>18735 SW Boones Ferry Road
>Tualatin, OR 97062-3090
>(503) 885-1231
>http://www.siqual.com
>
>
>Attachment Converted: "C:\Program Files\Eudora\Attach\scott3.vcf"
>

Todd Westerhoff
Technical Marketing Director | High Speed Systems Design | Performance
Engineering
Cadence Design Systems | 270 Billerica Road | Chelmsford, MA 01824

ph: (978) 262-6327
fx: (978) 446-6798
email: toddw@cadence.com
internal information website: http://www-ma.cadence.com/~toddw

**** To unsubscribe from si-list: send e-mail to majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE si-list, for more help, put HELP. si-list archives are accessible at http://www.qsl.net/wb6tpu/si-list ****