Download Take Home Midterm Exam

Spring 2006
EXAM
Name: ____________________________
CSE598A/EE597G
This exam is due on 3/2/2006, 11:30pm.
When finished, send this file to [email protected] as an email attachment. If the assumptions
are not clear, you may make reasonable assumptions, state them and explain clearly.
1. Why is the analog IC design important?
2. What are the advantages of CMOS ICs over others (technology)?
3. For the 0.5um CMOS technology, what is the size of smallest transistor? What is the optimal
supply voltage and why? What is the turn-on resistance of NMOS and PMOS transistors
(assume minimum size transistors, and for the rest)? What are the saturated drain currents?
What are the Vth of each transistor?
4. Show large positive gain single stage CMOS amplifier circuits with least number of transistors.
5. Show large negative gain single stage CMOS amplifier circuits with least number of
transistors.
6. List advantages and disadvantages of differential amplifiers over single ended amplifiers.
7. Why is the constant current source important in CMOS IC design?
8. List the reasons why CMOS amplifier gain is lower at high frequency.
9. List the ways to improve CMOS amplifier gain at high frequency.
10. List advantages and disadvantages of feedback amplifiers over non-feedback amplifiers.
11. What are the conditions for oscillation in feedback amplifiers?
12. List advantages and disadvantages of two-stage op amp over single-stage or three-stage op
amps.
13. What are the ways to compensate frequency for better stability of op amps?
14. How do the parameters in problem 3 change if the chip temperature increases? List the
changes for both NMOS and PMOS transistors.