14.5 The logic threshold voltage Vth of a CMOS inverter from (5.87) iswhere(a). Assuming t...

14.5 The logic threshold voltage V_th of a CMOS inverter from (5.87) is

where

(a). Assuming that μ_n = 2.5 μ _p, L_n = L_p for simplicity, derive an expression for the percentage change in V_th in terms of percentage change in V_T0,n,V_T0,p and W_p/W_n.

(b). For nominal values of V_T0,n = 0.8 V, V_T0,p = -0.8 V and W_p = 2.5W_n, determine the maximum (worst-case) deviation of V_th for a ±0.1V change in both V_T0,n and V_T0,p, and a ±15% change in W_p/W_n.