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How can i know the model which the simulator is using?

Muffassir

 Hi all,

 

I am using Cadence 6.1.4 and virtuoso ,gpdk180 and ADE L.

I want to know which model (BSIM3.3, BSIM4.6, BSIM SOI 4.0 or EKV 2.6)  of transistor (MOS) is being used by the simulator .how can i do that . Further how can i change the model to EKV 2.6 if possible. what are the steps to be followed.

 

Thanks in advance..

 

 

Parents
  • Andrew Beckett

    In OCEAN you can extract this after a dc operating point having been run (with spectre as the simulator):

    openResults("/path/to/psf")
    selectResult('dcOpInfo)
    outputs() => will list all the devices in the operating point data
    dataType("/I7/M2") => "bsim3v3" (for example)

    I don't think there's an interactive way to get this - but then it's a fairly unusual thing to do.

    The gpdk180 transistor models are bsim3v3. You can see this (as was suggested by kennethbrun) by looking in the model files, which are at <GPDK180instDir>/models/spectre/*mos*.scs . 

    Changing them to EKV will involve you having to provide a different set of model files (you'd have to create these yourself) and reference the models in Setup->Model Libraries in ADE. Given that model files are "characterized" (although in GPDK it's an artificial process, so they're effectively made up), that's not a trivial task unless you have some EKV models from elsewhere.

    Regards,

    Andrew.

     

Reply
  • Andrew Beckett

    In OCEAN you can extract this after a dc operating point having been run (with spectre as the simulator):

    openResults("/path/to/psf")
    selectResult('dcOpInfo)
    outputs() => will list all the devices in the operating point data
    dataType("/I7/M2") => "bsim3v3" (for example)

    I don't think there's an interactive way to get this - but then it's a fairly unusual thing to do.

    The gpdk180 transistor models are bsim3v3. You can see this (as was suggested by kennethbrun) by looking in the model files, which are at <GPDK180instDir>/models/spectre/*mos*.scs . 

    Changing them to EKV will involve you having to provide a different set of model files (you'd have to create these yourself) and reference the models in Setup->Model Libraries in ADE. Given that model files are "characterized" (although in GPDK it's an artificial process, so they're effectively made up), that's not a trivial task unless you have some EKV models from elsewhere.

    Regards,

    Andrew.

     

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