Northwestern Polytechnic UniversityEE468 - Microelectronics Circuit Design and Analysis

Homework #3 Due day: 2/23/2015Instruction:

A. Print your answers for each question in “word” file and show the script if you calculate inMatlab.B. Overdue homework submission can not be accepted.C. Takes academic honesty and integrity seriously (Zero Tolerance of Cheating & Plagiarism)

1. In the following circuit, given Vth0 = 0.7V, Vsb = 0, λ=0.1 1V and K’=120uA/ 2V , if Vo = 1.2V,what is DC bias of Vin to make two MOSFETs work in saturation region? In this DC quiescentpoint, find Av, Rin and Rout.

2. In the following circuit, given R=10K, Kn’=120uA/ 2V , Kp’=40uA/ 2V , Vthn=0.8V,Vthp= - 0.9V and λn=λp=0, find Vo1 and Vo2’s values. Is start-up circuit needed to make circuitwork? If so, explain why.

3. If R=3Kohm, Vth0 = 0.7V, Vsb = 0, λ=0 and K’=120uA/ 2V , do M1, M3 and M5 work insaturation region? If not, what is R’s minium value to let 3 devices in saturation region? At thisvalue of R, what are Vo(min), Io and Rout? Is that excellent current match (λ≠0) in twolegs?Explain it.