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gmoverid in dc operating point is not equal to gm/id

Hi,

I just want to do the gm/id plot, by following circuit

and i included one scs file with "save NM0:all", i can got gm, id and gmoverid by dc simulation. use following 3 expression to get the gm/id plot.

found in weak inversion region, why NM0:gmoverid is not same as getdata("NM0:gm"?result"dc") / getdata("NM0:id"?result"dc") ? thanks.

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highspeedio over 7 years ago

Hi Andrew, what is the difference between ids and id?

Furthermore, is the Vdsat number also given by id/gm on the dc opt point? I notice that Vdsat is not equal to what some designers call V* = gm/id
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highspeedio over 7 years ago

Hi Andrew, what is the difference between ids and id?

Furthermore, is the Vdsat number also given by id/gm on the dc opt point? I notice that Vdsat is not equal to what some designers call V* = gm/id
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