Ex 4.13: For the circuit shown in Figure 4.45(a), assume transistor parameters of VTN = +0.5 V, VTP = −0.5 V, kn′ = 80 μA/V2, kp′ = 40 μA/V2, and λn = λp = 0.015 V−1. Assume IBias = 0.1 mA. Assume M2 and M3 are matched. Find the width-to-length ratio of M1 such that the small-signal voltage gain is Av = −250. (Ans. (W/L)1 = 35.2)
4.61 The ac equivalent circuit of a CMOS common-source amplifier is shown in Figure P4.61. The transistor parameters for M1 are VTN = 0.5 V, kn′ = 85 μA/V2, (W/L)1 = 50, and λ = 0.05 V−1, and for M2 and M3 are VTP = −0.5 V, kp′ = 40 μA/V2, (W/L)2, 3 = 50, and λ = 0.075 V−1. Determine the small-signal voltage gain. Figure P4.61