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 Change models in cadence from bsim3V3 to EKV 

Last post Wed, Dec 5 2007 2:38 PM by archive. 4 replies.
Started by archive 05 Dec 2007 02:38 PM. Topic has 4 replies and 1798 views
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  • Wed, Dec 5 2007 2:38 PM

    • archive
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    Change models in cadence from bsim3V3 to EKV Reply

        Hi all,
    I know many models (BSIM3V3,BSIM4,EKV...)are available in Spectre simulator in Cadence, but how can I change the default model to another (e.g change bsim model to EKV model).

    Thanks a lot for your answers...

    Best regards


    Originally posted in cdnusers.org by isazul
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  • Wed, Dec 5 2007 11:40 PM

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    RE: Change models in cadence from bsim3V3 to EKV Reply

    Not sure this question makes sense. There's no "default model". Each instance of a transistor in a spectre netlist will instantiate a model - which is in turn a definition of a particular set of parameters for one of the built-in devices (such as bsim3v3, bsim4, psp, ekv etc).

    Normally design kits will have a set of symbols, each of which will be set up to netlist with a given model name. Those models will be defined in some files which get referenced via include statements into the spectre netlist.

    To change the definition of a model, you'd have to create a model file which has model statements in to give an appropriate set of parameters for whichever model you want to use - this is not something an end designer would normally do, since device characterisation is a non-trivial task. You can't just say - OK, I want to change to use EKV now - it's not as simple as that!

    Perhaps I've misunderstood the question - if so, please provide more detail so we don't have to guess what you really are asking...

    Regards,

    Andrew.


    Originally posted in cdnusers.org by adbeckett
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  • Thu, Dec 6 2007 11:31 AM

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    RE: Change models in cadence from bsim3V3 to EKV Reply

    I think you awsered my question. If I understood it's impossible to use the EKV transistor model unless the foundry give me the model parameters I need that caraterize their transistors.

    But If got the EKV model file, I think spectre is compatible with but is Hspice also compatible?

    Regards





    Originally posted in cdnusers.org by isazul
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  • Thu, Dec 6 2007 1:48 PM

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    RE: Change models in cadence from bsim3V3 to EKV Reply

    I can't answer that, sorry. Whilst I've used hspice a lot, I don't have detailed up to date knowledge since it is a Synopsys tool rather than a Cadence tool (as I work for Cadence). I've never used EKV models in HSPICE.

    Regards,

    Andrew.


    Originally posted in cdnusers.org by adbeckett
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  • Fri, Dec 7 2007 6:46 AM

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    RE: Change models in cadence from bsim3V3 to EKV Reply

    Ok Andrew,

    Thanks

    With best Regards


    Originally posted in cdnusers.org by isazul
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Started by archive at 05 Dec 2007 02:38 PM. Topic has 4 replies.