From what I read about gm/Id methodology, I thought we will chart all spec as a function of (gm/Id), which can be associated with Inversion Coeff. However, EE214 notes also chart fundamental "figure of merits" as a function of Vov (over drive voltage), which I thought we want to avoid doing so. Can anyone shed some light?
@ hdmi
- Vov (overdrive voltage) can be seen as useful parameter only in the region of strong inversion. In moderate inversion are the equations with Vov (the most of them, at least) not applicable.
- gm/Id methodology, on the other hand, applies not only for strong inversion, but also for moderate inversion and weak inversion.