[SI-LIST] Re: Simulated time doamin using freq domain models

Hi Joel,

Yes, this POLE-ZERO model is supported in HSPICE transient time domain =
simulation.

Jinghua

-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] =
On Behalf Of Joel Brown
Sent: 2007=C4=EA11=D4=C228=C8=D5 6:57
To: 'SI LIST'
Subject: [SI-LIST] Simulated time doamin using freq domain models

I am trying to run a simulation in LTSpice using what I think is a freq
domain spice model supplied by a connector manufacturer.
I tried this previously with a different model that had LAPLACE =
statements
in it. I was told by Linear Tech this would probably not work in the =
time
domain.=20

The model I have now has POLE-ZERO functions like this:

=20

G_1_1 161 pg POLE 161 pg

+ -0.5113259737

+ -8.024176907e+010 0

+ 1064165150 -9906054846

+ 298211672 -6750230161

+ 3400708536 -6577097876

+ 727752505.4 -4935354629

+ -8556525.328 0

+ /

+ 1

+ 1416036658 -9898181440

+ 5.271741172e+010 0

+ 1.421215765e+010 -7131900170

+ 321756585.2 -6751551020

+ 748855739.3 -4995138526

+ 1.767690749e+010 0

=20

It is really an Hspice model and according the Hspice manual this format =
is
supported. The LTSpice manual does not show a POLE function being =
supported
so I am not sure if it even knows what it is. I do have Hspice but =
cannot
run it right now due to some licensing issues. But even if I could, will =
a
POLE-ZERO function work in a transient time domain simulation? If not =
what
good are these spice models?

=20

Thanks - Joel

=20

=20



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