The NMOS transistors in the circuit shown in Figure have parameters Kn = 0.2 mA/V2, VT N = 0.5 V, λ = 0, and γ = 0.
(a) For gate voltages of φ = 2.5 V, determine the quasi-steady-state output voltage for (i) vI = 0, (ii) vI = 2.5 V, and (iii) vI = 1.8 V.
(b) Repeat part (a) for gate voltages of φ = 2.0 V.