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Simulators >> Circuit Simulators >> has BSIM4 been incorporated into Cadence yet?
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Message started by naren on Mar 10^th, 2006, 12:12am

Title: has BSIM4 been incorporated into Cadence yet?
Post by naren on Mar 10^th, 2006, 12:12am

Hello,

I am trying to find out which version of analog artist has the ability to recognize BSIM4 modle files.

Does anyone know about this?

Thank you very much

Naren

Title: Re: has BSIM4 been incorporated into Cadence yet?
Post by bernd on Mar 10^th, 2006, 2:09am

Find out yourself

spectre -W
spectre -help bsim4

Bernd

Title: Re: has BSIM4 been incorporated into Cadence yet?
Post by Geoffrey_Coram on Mar 15^th, 2006, 5:22am

BSIM4.2.1 was in Spectre 4.4.6 years ago. If you need a later BSIM4 (Berkeley is on 4.5), you'll need a newer version of Spectre.

Title: Re: has BSIM4 been incorporated into Cadence yet?
Post by naren on Mar 15^th, 2006, 11:50pm

I think the version of SpectreRF is 4.4.6.

I typed in "spectre -W" and I get "sub-version 4.4.6.061301"

"spectre -help bsim4" gives "No such analysis, device etc etc.....".......there is no Bsim4...highest is bsim v3.3.2.

please help.

Title: Re: has BSIM4 been incorporated into Cadence yet?
Post by bernd on Mar 16^th, 2006, 1:11am

sub-version 4.4.6.061301 is equal to Cadence DFII 4.4.6 QSR2
and it is pretty old (June 2001) and you're right bism4 is not supported in this
release.

Can you update? The higher version the better it would be.
If you are on a University program and you don't have access to
the latest DFII version, you should update at least to
Cadence DFII 4.4.6 MSR10 == sub-version 4.4.6.031103 (March 2003).
This version supports bsim4 version 2.1, which is not the newest, but
might help you.

Bernd

Title: Re: has BSIM4 been incorporated into Cadence yet?
Post by naren on Mar 16^th, 2006, 9:25pm

I am trying to find out how an LNA using a 65nm process works.

I have the model files for such nm process from

http://rfic.eecs.berkeley.edu/~niknejad/ee142/pdf/models65.lib

However, I do not have the required version of spectre to try these out.

I am unable to upgrade either!

guess I am handicapped eh!

Title: Re: has BSIM4 been incorporated into Cadence yet?
Post by Geoffrey_Coram on Mar 17^th, 2006, 5:15am

That's an odd set of models -- no STI stress parameters, no well-proximity effect, ... and the version is 4.0.

I don't think this really corresponds particularly well to an actual 65nm process. Do you have a netlist built for this specific model library? If not, the LNA is probably not biased correctly because it will have been designed using other models. Are you trying to understand how a generic LNA works? In which case you should look for bsim3 models for an older technology.