For the circuit in Fig.2, there is a constant current source which requires 0.8 V voltage drop to generate the constant current. Compute the value of gate voltages of each transistor (VG1, VG2, and VG3) for this circuit where (W/L)1 = (W/L)2 = 4*(W/L )3 = 20. Draw a representative MOSFET circuit for the constant current source. Assume λ = 0, μnCox = 200 μA/V2 , Vt,n = 0.4 V.
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For the circuit in Fig.2, there is a constant current source which requires 0.8 V voltage drop to generate the constant current. Compute the value of gate voltages of each transistor (VG1, VG2, and VG3) for this circuit where (W/L)1 = (W/L)2 = 4*(W/L )3 = 20. Draw a representative MOSFET circuit for the constant current source. Assume λ = 0, μnCox = 200 μA/V2 , Vt,n = 0.4 V.
![(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)