Q2) The circuit parameters for the three-transistor current source shown in the figure are as follows: V+ = 3 V V− = −3 V R1 = 30 kΩ For transistors 1 and 2; VBE1,2(ON) = 0.7 V and β1,2 = 120 For transistor 3; VBE3(ON) = 0.6 V and β3 = 80. Determine IREF, IO, IB1, IB2, IB3, IC1, IC2 and IE3.
![(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)
