Subject: [IBIS-Users] FW: Convergence problem
From: John Angulo (jangulo@innoveda.com)
Date: Wed Jul 10 2002 - 17:25:41 PDT
The following is posted on behalf of Ambrish Varma at NC State University,
Raleigh, NC. Please send all private replies to akvarma@ncsu.edu.
John Angulo
IBIS Open Forum Postmaster
-----Original Message-----
From: "Ambrish Varma" <akvarma@ncsu.edu>
Hi,
I am trying out the s2ibis2 examples that illustrate the use of S2IBIS2 -but
having convergence problems with all of the examples. Each time I am running
hspice on the *.spi files(which are generated after I run S2IBIS2 on the
*.s2i file), I am getting an error 'time step too small in pseudo tran.,
delta = xyz'
'no convergence in dc sweep curves at -3.300'
I am using Hspice and doing a DC sweep from-3.3 to 6.6 .
I notice that at -3.3 v, the current is shown as 1.704s+17 - which is
absurd.
Also, the ibs value of the mosfets is of the order of e+16.
What am I doing wrong? or am I missing something crucial?
Thanks for your help in advance.
Ambrish Varma
NC State University, Raleigh, NC.
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