The NMOS and PMOS transistors in the circuit of Fig. 5.26(a) are matched, with kn′(Wn/Ln) = kp′(Wp/Lp) = 1 mA/V2 and Vtn = −Vtp = 1 V. Assuming λ = 0 for both devices, find the drain currents iDN and iDP, as well as the voltage vo, for vI = 0 V, +2.5 V, and −2.5 V. (a) (b) Figure 5.26 Circuits for Example 5.8.