Stats

  • Locked Locked
  • Replies 19
  • Subscribers 130
  • Views 32681
  • 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

How to use BSIM-CMG models to build and simulate FinFET circuits

Ahmed Taha

Hi All,

I need to simulate FinFET based circuits

I have BSIM-CMG codes and models from www-device.eecs.berkeley.edu/.../

this includes veriloga files.va and files.include and model card.nmos files

I tried several methods to add these in Cadence, but still something missing 

so I am asking about the right way to add such files to enable circuit simualtion. 

 if any one managed to do this before, could help.

Thanks 

Parents
  • Andrew Beckett

    It should not be necessary to use the VerilogA models, since bsimcmg is built in to spectre (MMSIM11.1  contains the latest version of bsimcmg, 106.1 (as mentioned on the page you gave).

    You can run the examples as provided directly in spectre (I commented out the .hdl lines, but even with the .hdl line it runs). Whether the results are as expected is another matter, but then these are slightly artificial examples.

    For example: spectre inverter_transient.sp

    If you're talking about ADE, you can add the model file (modelcard.nmos) directly in ADE in Setup->Model Libraries. You'd probably need to create a transistor component (based on nmos4 maybe) with the right parameters, since bsimcmg has different parameters than most MOS models (see "spectre -h bsimcmg" - it doesn't have w and l, but has w,d, nf, nfin etc). 

    Best is to get the models from the foundry process you're using.

    Andrew.

     

     

Reply
  • Andrew Beckett

    It should not be necessary to use the VerilogA models, since bsimcmg is built in to spectre (MMSIM11.1  contains the latest version of bsimcmg, 106.1 (as mentioned on the page you gave).

    You can run the examples as provided directly in spectre (I commented out the .hdl lines, but even with the .hdl line it runs). Whether the results are as expected is another matter, but then these are slightly artificial examples.

    For example: spectre inverter_transient.sp

    If you're talking about ADE, you can add the model file (modelcard.nmos) directly in ADE in Setup->Model Libraries. You'd probably need to create a transistor component (based on nmos4 maybe) with the right parameters, since bsimcmg has different parameters than most MOS models (see "spectre -h bsimcmg" - it doesn't have w and l, but has w,d, nf, nfin etc). 

    Best is to get the models from the foundry process you're using.

    Andrew.

     

     

Children
No Data

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.