Consider the CS amp with a current source load.
Vin = 1 V and Vb = 1.5 V. The transistor parameters are (W/L)1 = (W/L)2 = 100. Use
Table 2.1 in the textbook for all other transistor parameters.
(a) Show why both M1 and M2 cannot be in the saturation region.
(b) Find operation regions of M1 and M2. What is Vout?
(c) We want to adjust Vb to make both M1 and M2 in the saturation
region. Find the range of Vb. If such a range does not exist,
show it.

 

Vb Vin 3 V VDD M - Vout M