Problem:
The MOSFET in the circuit of Figure has Vt = 0.8 V, kn = 5 mA/V2, and VA = 40 V.
(a) Find the values of RS , RD, and RG so that ID = 0.4 mA, the largest possible value for RD is used while a maximum signal swing at the drain of ± 0.8 V is possible, and the input resistance at the gate is 10MΩ . Neglect the Early effect.
(b) Find the values of gm and ro at the bias point.
(c) If terminal Z is grounded, terminal X is connected to a signal source having a resistance of 1MΩ, and terminal Y is connected to a load resistance of 10 kΩ, find the voltage gain from signal source to load.
(d) If terminal Y is grounded, find the voltage gain from X to Z with Z open-circuited. What is the output resistance of the source follower?
(e) If terminal X is grounded and terminal Z is connected to a current source delivering a signal current of 50 μA and having a resistance of 100 kΩ , find the voltage signal that can be measured at Y. For simplicity, neglect the effect of ro.
