Perhaps, I should repeat my question above more clearly.
first, why the Vgs should be vt+200mV while ploting gm*ro versus vds?
second, while sweeping vds, the actual threshold voltage would change as well, how should we define the value of "vt" in the "vt+200mV". Is the "vt" equal to "vth0" listed in the technology file?
v*=vgs-vt, usually use v*=200mv for design.
vth≠vth0
Just my points.
peterlau1984 said:
Perhaps, I should repeat my question above more clearly.
first, why the Vgs should be vt+200mV while ploting gm*ro versus vds?
second, while sweeping vds, the actual threshold voltage would change as well, how should we define the value of "vt" in the "vt+200mV". Is the "vt" equal to "vth0" listed in the technology file?