Figure 3 shows a current source. The NMOS transistor parameters are VTN = 0.4 V, kn = 100 uA/V2, lambdan = 0 and the PMOS transistor parameters are VTP = -0.6 V, kp = 40 uA/V2, lambdap = 0. The width-to-length ratios are (W/L)1 = 15, (W/L)2 = (W/L)3 = 9, and (W/L)4 = 20. Assume IREF = 200 uA. What is the value of I0.
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Figure 3 shows a current source. The NMOS transistor parameters are VTN = 0.4 V, kn = 100 uA/V2, lambdan = 0 and the PMOS transistor parameters are VTP = -0.6 V, kp = 40 uA/V2, lambdap = 0. The width-to-length ratios are (W/L)1 = 15, (W/L)2 = (W/L)3 = 9, and (W/L)4 = 20. Assume IREF = 200 uA. What is the value of I0.
![(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)
