Please consider the CMOS amplifier of Figure 3. Given that IREF = 50 μA, VX = 1.5 V and λn = λp = 0.0125 V−1. Assume that all NMOS transistors have kn′ = 50 μA/V2, VTN = 1 V and all PMOS transistors have kp′ = 25 μA/V2, VTP = −1 V. Neglect λ for bias calculations. Assume saturation region operation for all transistors. The transistor aspect ratio W/L is given on the figure for each transistor. (Recall: kp′ = Cox⋅μn and kp′ = Cox⋅μp) (30 points). a) Please, find IREF and R. b) Please, find IDQ for each transistor c) Please, find the voltage gain, vo3/vo2. Figure 3
![(b) For a MOSFET current source shown in Figure 5 the circuit parameters are: V+ = 3 V and V − = −3 V. Transistor parameters for NMOS are: VTN = 0.7 V, kn′ = 200 μA/V2 and λn = 0.01 V−1; and the transistor parameters for PMOS are: VTP = −0.6 V, kp′ = 80 μA/V2 and λp = 0.03 V−1. The transistor aspect ratios are: (W/L)1 = 10, (W/L)2 = 35, (W/L)3 = 5 and (W/L)4 = 15. Find IO, IREF and the VGS voltages for all transistors if the minimum voltage at the drain of transistor M2, i.e. VD2 is −2.3 V. [12 Marks] Figure 5](https://www.doubtrix.com/uploads/editor/2283158972ZKWioHWPli.jpg)
