Subject: RE: Simulating IBIS models using XTK
From: Khalid Ansari (khalida@vitesse.com)
Date: Thu Jan 24 2002 - 14:35:56 PST
Hi all,
I am using the B element of HSPICE ( as recommended by
the gurus) to simulate my IBIS model that I created. This
IBIS model is for TTL I/Os that I created using the s2ibis utility.
The complete model looks fine but when I simulate one of the
macro models I see a digital signal rather than an analog signal
that I should see at the output. When I take the hspice deck
for the TTL I/O and simulate it I see a nice analog signal at the
end. This, I believe but the B element simulation of the IBIS
model I do not believe. Basically this is what it looks like:
---------------
*
*
*
--------------------------------
for the hspice output and
--------------
*
*
*
-------------------------------------
for the IBIS output.
What could I be doing wrong here? Any inputs will be appreciated.
My hspice deck with the b element looks like this:
.option post probe
.option accurate
.opt dv=1
vin nd_in 0 pulse(0.8 2.0 2.0ns 1ns 1ns 2ns 6ns)
b1 nd_pc nd_gc nd_in nd_out_of_in
+ file = '871.ibs' model = 'pnl_it2nn8'
rpadx nd_in nd_inx 2
.op all
cload nd_out_of_in 0 20ff
.probe tran v(nd_in)
.probe tran v(nd_out_of_in)
.tran 5ps 5ns
.end
Thanks,
Khalid
At 12:42 PM 1/23/02 -0800, Muranyi, Arpad wrote:
>Khalid,
>
>You don't need to do any conversion if you want to use HSPICE
>with IBIS models. They have now a B-element which can read IBIS
>files directly.
>
>Arpad Muranyi
>Intel Corporation
>==============================================================
>
>-----Original Message-----
>From: Khalid Ansari [mailto:khalida@vitesse.com]
>Sent: Wednesday, January 23, 2002 10:23 AM
>To: Alan Hilton-Nickel
>Cc: ibis-users@eda.org; ibis-support@nqesv1.nms.nec.co.jp
>Subject: Re: Simulating IBIS models using XTK
>
>
>Alan, Bill, Tadashi and others,
>
>Thank you all for your responses.
>
>I use HSpice quite a bit. I guess I can run the simulations in
>Hspice too since I don't have Scratchpad. When converting IBIS
>models to Hspice compatible using ibis2spice is there any chances
>of me loosing any important part of the IBIS model?
>
>Khalid
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