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Hey Erikl:
But I wanna see the characteristic of gm of the rail-to-rail op. It might be
gm=gmp when vicm< Vdsat+Vgsn
gm=gmn when vicm>Vdsat+Vgnp
gm=gmp+gmn when Vdsat+Vgsn>vicm>Vdsat+Vgnp
I am supposed to see the graph of this trend based on the book of Allen Holberg.
I do know how to simulate the gm of a transistor by using deriv function. However, I wanna run the result of gmp+gmn vs Vicm. I can't use the above method because the current will be flat when the vicm reaches transition point.
It turns out that the gm will be zero when the slope of current is...
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