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  1. #1
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    How can I get the comprehensible parameters from model parameters? - See more at: htt

    hello:

    I have acquired the physical parameters of MOSFET from TSMC PDK model XXX.scs file.

    it appears like this:

    model nch bsim4 {
    1: type=n
    + lmin=9.999997e-006-(dxln+dlmisn) lmax=2.00001e-05
    + wmin=1e-005-(dxwn+dwmisn) wmax=0.0009000001 version=4.5
    + gbmin=1.00e-12 rbsb=50 ud=0
    + rbdb=50 rgeomod=1 rbpb=50
    + rshg=1.539650e+01 rbps=50 rbpd=50
    + ngcon=1 binunit=2 paramchk=1
    + mobmod=0 capmod=2 igcmod=1
    + igbmod=1 diomod=1 rdsmod=1....................this is just a slice of the whole definition


    I am trying to get the design variables such as Cgs, Cds, gm, Id, and etc. which I can get from ADE browser. right now, I need the equations that could link the physical parameters to these regular design variables. I have looked up the MMSIM151 doc: spectremod:Virtuoso ® Simulator Components and Device Models Reference. it says that "The TSMC Model Interface (TMI) implements a modified version of the BSIM4 model, known as TMIBSIM4." in page 1317. my question is where can i get the TSMC model equation. thanks in advance.
    - See more at: https://community.cadence.com/cadenc....ul4PcNWq.dpuf

    •   Alt11th January 2017, 13:54

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  2. #2
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    Re: How can I get the comprehensible parameters from model parameters? - See more at:

    BSIM is an empirical model, without correlation to
    classical device physics in many aspects (but some
    params are still recognizable / useful).

    The "design variables" you mention are not design
    variables, they're operating-point characteristics.

    I believe I've found good BSIMx.y documentation at
    the source, University of California at Berkeley. You
    may also try places like designersguide.org (Ken
    Kundert's stuff).

    But why you'd rather calculate than simulate (which
    performs the same steps as you would, only without
    missing any or fat-fingering calculator buttons) is a
    question.



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