) The small-signal transconductance in the saturation region is defined as gmat ≡ dId sat/Vgs. Derive an expression for gmsat using Eq. (3.79) based on the n = 1 velocity saturation model. Show that gmsat approaches the saturation-velocity-limited value, Eq. (3.96), when L → 0. What becomes of the expression for gmsat in the long-channel limit when ʊsat→[infinity]