Prob #1

Answer the following questions for the common source amplifier below. You are given the following

information:

½ U.C. -60UA/V²

All L=2Lmin=1um

All Veff=0.2V

Ve=0.8V

C₁=10pF

Ibics

½ u, C., 20uA/V²

Lambda Lambdamas 0.1V¹ for 1um gate length

Ibias 50uA

V= -0.9V

Vour Vos/2

J

VIN TED

a

5V

Vont

좋은

+50

1:1 mirror

1. What is the voltage at node a?

2. What is the width of devices 2 and 3?

3. In terms of transconductances and output conductances and capacitances, what is the dominant

pole?

4. Approximately, what is the value of this pole? Note that the load capacitance is very large.

5. What is the equation for low frequency gain? Evaluate numerically.

6. How does the low frequency gain change if I doubles holding Van and L constant for all

devices?