Find the transition points for the p-channel and nchannel

Question

Consider the CMOS inverter in Figure biased at V_DD = 2.5 V. The transistor parameters are V_TN = 0.4 V, V_TP = -0.4 V, and K_n = K_p = 100μA/V².

(a) Find the transition points for the p-channel and nchannel transistors.

(b) Sketch the voltage transfer characteristics, including the appropriate voltage values at the transition points.

(c) Determine v_O for v_I = 1.1 V and v_I = 1.4 V.