Problem 2: Consider the amplifier shown in Figure 2. Ignore

CL. Assume that all transistors are in saturation.

(a) Express the small signal transconductance of M3 namely gm3,

in terms the small signal transconductance of M2, namely gm2.

Hint: You can assume that VSD is the same for M2 and M3.

(b) Determine the gain, Ay, of the amplifier.

(3+7= 10 points)

Bs

M₂

W/L

WHhM₁ R₂.

Figure 2

M₂

4W/L

C₂₁