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Device (BSIM4) operating-point parameters

HoWei

Hi,

I do have one general and three specific questions concerning operating-point parameters (especially for BSIM4).

General question:

1. The operating-point parameters are not defined by the BSIM4 model, but are specific to the simulator used (Spectre, HSpice, Eldo), correct ?

This is why I find the operating point parameters documented in the Spectre documentation only and not in the BSIM4 manual, right ?

Specific questions to operating point parameters:

2. What is the difference between OP "vdsat" and "vdss" (I don't find any explanation in the latest spectre documentation v18.10 and the values after simulation seem to be the same) ?

3. What is the difference between OP "betaeff" and "beff" (I don't find any explanation in the latest spectre documentation v18.10 and the values after simulation differ) ?

4. What is OP "self_gain" ( I assume it is the intrinsic gain of gm*rout, but did not find documentation for it) ?

Parents
  • Andrew Beckett

    I don't know the answer. I suggest you contact customer support as this probably needs R&D input to ensure the documentation gets updated to link to the explanation of each parameter.

    Regards,

    Andrew

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  • Andrew Beckett

    I don't know the answer. I suggest you contact customer support as this probably needs R&D input to ensure the documentation gets updated to link to the explanation of each parameter.

    Regards,

    Andrew

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