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Multisim and Ultiboard

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How do I configure an NMOS component to the specifications I need?

The virtual NMOS model in MultiSim says that it's fully configurable.  However, I'm not sure how to configure it to the parameters I need.

I need to configure the following parameters:


Width
Length
V_t
u_n C_ox
Lambda
Cgs
Cgd
Cdb
Csb


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How do I configure an NMOS component so that I can set the specifications above?

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Hi Doven,

 

The virtual model does allow you to change the NMOS spice parameters. You can double-click on part to view the model.

 

SPICE does not have some of the parameters you listed; this is why you don't it in Multisim.  You can refer to the following page for more information about SPICE syntax:

http://bwrcs.eecs.berkeley.edu/Classes/IcBook/SPICE/UserGuide/elements_fr.html

 

Most SPICE models are created by curve fitting, so you cannot use datasheet information too directly to create a custom SPICE model.

 

 

Tien P.

National Instruments
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