Stats

  • Locked Locked
  • Replies 5
  • Subscribers 125
  • Views 14687
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Altering model parameter of single instance

ChrisEAS

Hi there. I'd like to convince Spectre to alter a model parameter of a single instance only. Say I'm having...

 M0 (d g 0 0) mymodel l=1 w=1

 M1 (d g 0 0) mymodel l=1 w=1

and I'd like to have something like

 alter1 alter dev=M1 param=tox value=3.141

However, the above statement won't work. I'd really like to avoid defining a new model each time...

Thanks!

  • I don't think you can - it would have to disable model sharing in this situation. You'll need to contact customer support an request an enhancement (unless I'm mistaken and it can be done somehow). For example, you can't do dev=M1 mod=mymodel - dev and mod are mutually exclusive.

    Andrew.

  • Since I wanted to work with several alters, this is quite a shame. I was then trying to create model aliases, eg.

     model tox_model mymodel tox=3.141

    but that didn't work either. Might be due to my Spectre version 6.1.1. So my only option seems to be a separate model card for each altered parameter, or is there another possiblity?

    Chris

  • That's quite an old version of spectre - probably 5-6 years old - newer versions do support model aliases (although not sure if you can modify the parameters still - I'll leave that as an experiment for  you),

    Andrew.

  • Is it possible to have a model alias for a model from a model group? Suppose there this group model_group. Writin

      model tox_model model_group tox=3.141

    I get the cryptic error message "It is illegal for model tox_model which based on model group model_group". Next I tried to pick a model from the group by writing

      model tox_model model_group.1 tox=3.141

    which didn't work either. Is there a way to achieve this?

     Chris

  • Chris,

    Not as far as I know. I'd suggest contact Customer Support.

    Regards,

    Andrew.

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.