Problem 1: Consider a MOS amplifier incorporating the resistive-divider biasing circuit with source degeneration RG1 = RG2 = 10 kΩ μnCox = 400 μA/V2 VDD = 4.0 V VTH = 0.4 V W/L = 28 μm/280 nm RD = 500 Ω RS = 20 Ω λ = 0.08 V−1 Question 1: Calculate the drain current assuming M1 to be in saturation Fig. 1 Question 2: Calculate voltage gain