I have a question to ask about BSIM model, I hope it
will not take too much time for you to answer this question. Since now
I am using a BSIM3.3 0.18-um CMOS model in my work (Cadence, Spectre)
and I am wondering about how to figure out the total parasitic
capacitances of a transistor. In PSPICE, after I ran a simulation and
click on the Probe window to see the output file, I can see a list of
small-signal parameters saying that, for example, Cgs = 10 fF (for
intrinsic), Cgsov = 20 fF (for overlap capacitance), etc.
However, for BSIM3.3 and for Spectre simulator, I received a set of
small-signal parameters after running a simulation, for example, as
shown in the attached file. For these parameters, for the capacitances,
I don't know how to calculate the total intrinsic and extrinsic
capacitances since they are separated into several capacitances. Would
you mind to explain me a little bit about this ?