QUESTION 11: Consider the basic two-transistor NMOS current source shown in the following figure. The circuit parameters are V+ = 5 V, V− = −5 V, and IREF = 217 μA. The transistor parameters are VTN = 1.0 V, kn′ = 80 μA/V2, and λ = 14×10−3 V−1. For (W/L)1 = (W/L)2 = 3, calculate IO for VDS2 = 3.2 V. VGS(V) Format : 9.7562 RO(kΩ) Format : 765.9257 △IO(μA) Format : 9.6594875803085 IO at required VDS2(μA) Format : 553.8432
![(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)
