MAGIC Magic Mailing List
 
 
From: Martin, Mark (Mark.Martin AT jhuapl DOT edu)
Date: Mon Jun 23 2003 - 08:32:55 EDT

  • Next message: Stefan Jones: "RE: [Ngspice-users] Re: Saturday, I give up" 

    No, I was not sure and a recent message from Stefan, clearly
shows that I am wrong.  However, a quick glance at the BSIM3v3
manual and the HSPICE manual this morning may clear this up.

I don't see the XL or XW parameters in the actual BSIM3v3 docs.
However, they are mentioned in the HSPICE docs.  They are basically
corrections in L and W to account for etching of the silicon that
results in the W,L being smaller than drawn.

Anyway, based on my 10 minutes of research I believe that the XL
and XW parameters are specific to the HSPICE implementation (and
HSPICE compatible simulators).  I would think that one could just
remove them from the deck (and of course change the model number
from 49 to 8) and all should be well.  However Charles claims this
didn't work for him so I am at a loss.

Unfortunately, I can't code myself out of a paper bag so I am of
little use in tracking this down at the source level. :-)

That said, as a prospective user, I hope this can be resolved in 
short order.  It looks like the tools are starting to come together
and I am getting anxious :)

Mark

> -----Original Message-----
> From: Michael Doster [mailto:mtdos AT erols DOT com]
> Sent: Sunday, June 22, 2003 5:15 PM
> To: Martin, Mark; 'magic-dev AT csl DOT cornell.edu';
> 'ngspice-users AT lists DOT sourceforge.net'
> Subject: Re: [Ngspice-users] Re: Saturday, I give up
> 
> 
> Mark,
> 
> Are you sure. In the 
> tclspice/src/spicelib/devices/bsim3v1/bsim3v1init.c, I
> see the following lines:
> 
> SPICEdev BSIM3V1info = {
>     {
>         "BSIM3V1",
>         "Berkeley Short Channel IGFET Model Version-3 (3v3.1)",
> 
> 
> -- Michael Doster
> 
> > it doesn't seem that tclspice has the correct model.
> > 
> > The parameters from MOSIS are for the BSIM3v3.1
> > 
> > Based on the directories I see in the tclspice tree,
> > BSIM3v3 is not present (only BSIM3v1,BSIM3v2)
> > 
> > The source for BSIM3v3 can be found at
> > 
> > http://www-device.eecs.berkeley.edu/~bsim3/get.html
> > 
> > I hope this can be integrated into the simulator soon.
> > It would be nice to have a simulator to use at home.
> > Since BSIM3v3 is the industry standard, it goes without
> > saying, that tclspice must have it.
> > 
> > Additionally, I think the EKV model would also be a nice
> > addition. 
> > 
> > I believe a coworker has already done this with a copy of
> > spice3f.  
> > 
> > Mark
> > 
> > 
> > -----Original Message-----
> > From: Jeff Sondeen
> > To: cfk
> > Cc: ngspice-users@lists.sourceforge.net; magic-dev AT csl DOT cornell.edu
> > Sent: 6/21/2003 10:18 PM
> > Subject: [Ngspice-users] Re: Saturday, I give up
> > 
> > 
> > cfk writes:
> > ...
> >> output lines. I am puzzled here because I am trying to 
> tell it to use
> > BSIM4
> > 
> > Hi Charles, it sounds like you're trying to pass a bsim 3.1 model,
> > which isn't being accepted by tclspice, as a bsim4 model (which it
> > isn't).  i would also not trust the simulation results.
> > 
> > /jeff
> > 
> > PS. we agree, i hope, that the model in the file:
> > 
> > 
> > 
> http://www.mosis.org/cgi-bin/cgiwrap/umosis/swp/params/tsmc-01
8/t34b_mm_
> non_epi-params.txt
> 
> clearly says it's a bsim3.1 model:
> 
> T34B SPICE BSIM3 VERSION 3.1 PARAMETERS
> SPICE 3f5 Level 8, Star-HSPICE Level 49, UTMOST Level 8
> 
> /jeff
> 
> 
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