[SI-LIST] Re: Use of package model in SPECCTRAQuest

Ravinder,

One more thing I'd like to mention is the hierarchy in which parasitic =
parameters are handled in SQ (see SQ Simulation and Analysis Reference =
documentation for detail).

There are three levels:=20
1. Estimated pin parasitic data in a device model
2. Individual pin data in a device model
3. Package Model used with a device model

When individual pin data is used, item 1 is ignored.
When a package model is used, items 1 and 2 are completely ignored. This =
means that each pin's parasitic value must be defined in the package =
model.

Regards

 Juergen Flamm
=20

-----Original Message-----
From: Ravinder.Ajmani@xxxxxxxx [mailto:Ravinder.Ajmani@xxxxxxxx]=20
Sent: Friday, August 15, 2003 4:23 PM
To: Ken Willis
Cc: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Use of package model in SPECCTRAQuest

Ken,
Thanks a lot for your tip.  Also thanks to all of you who responded. =
After=20
I ran ibis2signoise to translate the .ibs and .pkg models, the .dml =
files=20
were generated for both the models, and Device model had a reference to=20
the Package model.  Only, it didn't show up as pin parasitic in the pin=20
data.  As you indicated in your note, I was able to see the package =
model=20
in the subcircuit, when I simulated the net in SigXp.
Regards, Ravinder
Server PCB and Flex Development
Hitachi Global Storage Technologies


Email: Ravinder.Ajmani@xxxxxxxx






"Ken Willis" <kwillis@xxxxxxxxxxx>
Sent by: si-list-bounce@xxxxxxxxxxxxx
08/15/2003 05:42 AM
Please respond to kwillis

=20
        To:     <Ravinder.Ajmani@xxxxxxxx>, <si-list@xxxxxxxxxxxxx>
        cc:=20
        From:   si-list-bounce@xxxxxxxxxxxxx
        Subject:        [SI-LIST] Re: Use of package model in =
SPECCTRAQuest




Hi,

If the device-level IbisDevice model calls out the PackageModel,
and finds it in the library, then it will get used in the
simulation. If you want to double-check, you can run a sim in
SigXp, and go look at the spice file it generated in the
latest sigxp.run\case#\sim#\comps.spc file. You should see the
subcircuit in there.

Ken


-----Original Message-----
From: Ravinder.Ajmani@xxxxxxxx [mailto:Ravinder.Ajmani@xxxxxxxx]=3D20
Sent: Wednesday, August 13, 2003 5:50 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Use of package model in SPECCTRAQuest


Hi SI experts,
A vendor has sent me a separate package model along with the IBIS model. =
=3D

When I converted the .ibs file to .dml file for SPECCTRAQuest, it =3D
inserted=3D20
the name of package model in the .dml model, but there was no =
package=3D20
model to be seen in the model library.  Later, I translated the .pkg =3D
file=3D20
to another .dml file and now I can see the package model in the =
model=3D20
library with the same name contained in the buffer .dml file.  However, =
=3D
I=3D20
am not sure if SPECCTRAQuest will use this package model during run =3D
time,=3D20
because the .dml file for buffer model still does not show any pin info. =
=3D

Am I doing something wrong here.
I will very much appreciate your help in this matter.=3D20
Regards, Ravinder
Server PCB and Flex Development
Hitachi Global Storage Technologies

Email: Ravinder.Ajmani@xxxxxxxx



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