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How to extract BSIM3 capacitances with a DC sweep?

Question asked by kemsyt on May 25, 2015
Latest reply on May 26, 2015 by aehoward
Dear all,

I'm trying to extract the BSIM3 capacitance (particularly interested in the "Cgs" one). 

However, I can only do it for one DC operating point, but not for a DC sweep. How can I do it? In particular, I want to do it because I want to peform Gm/Id based design, so I'm looking into plotting the F_t against Gm/Id of a transistor.

If you know ways to do either of those things, I'd truly appreciate it if you could let me know.

I'm attaching my setup. The NMOS transistor is of course a top-level view of the BSIM3 model.

Best regards,