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How does spectre read the value of each parameter from the spice model file.

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How does spectre read the value of each parameter from the spice model file. I compared the ami model file and the attached model file. There appears to be some difference in the symbol representation like in attached file threshold voltage is represented by Vt0 but in ami file its represented as VTH0.

How is spectre able to understand Vt0 also as threshold voltage and VTH0 also as threshold voltage
m1_typ.doc
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  • Each model will be a particular model type. In SPICE syntax, you'll see it's something like:

    .model modelName modelType ... level=N

    The modelType and level map to one of the models in spectre (for example, mos1, mos2, bsim3v3, bsim4,psp102 etc).

    In spectre syntax it's more explicit:

    model modelName modelType type=n

    where modelType is mos1, bsim3v3, hicumhv etc.

    For the equations of each model, if you run <MMSIMinstDir>/tools/bin/cdnshelp and then navigate to MMSIM->Virtuoso Simulator Components and Device Models Reference, or look at <MMSIMinstDir>/doc/spectremod/spectremod.pdf or even at http://support.cadence.com/wps/mypoc/cos?uri=deeplinkmin:DocumentViewer;src=pubs;q=spectremod/spectremod13.1.1/spectremodTOC.html then you'll see the equations used. Also "spectre -h mos1" or "spectre -h bsim4" will tell you a short definition of each model parameter. 

    Regards,

    Andrew. 

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  • Each model will be a particular model type. In SPICE syntax, you'll see it's something like:

    .model modelName modelType ... level=N

    The modelType and level map to one of the models in spectre (for example, mos1, mos2, bsim3v3, bsim4,psp102 etc).

    In spectre syntax it's more explicit:

    model modelName modelType type=n

    where modelType is mos1, bsim3v3, hicumhv etc.

    For the equations of each model, if you run <MMSIMinstDir>/tools/bin/cdnshelp and then navigate to MMSIM->Virtuoso Simulator Components and Device Models Reference, or look at <MMSIMinstDir>/doc/spectremod/spectremod.pdf or even at http://support.cadence.com/wps/mypoc/cos?uri=deeplinkmin:DocumentViewer;src=pubs;q=spectremod/spectremod13.1.1/spectremodTOC.html then you'll see the equations used. Also "spectre -h mos1" or "spectre -h bsim4" will tell you a short definition of each model parameter. 

    Regards,

    Andrew. 

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