EECS 140 Midterm Solutions for UC Berkeley - EECS Department by R.W. Brodersen, Exams of Electrical Circuit Analysis

The solutions to the midterm exam for eecs 140, a course offered by the university of california, berkeley's department of electrical engineering and computer science. The exam, administered by r.w. Brodersen, covers various topics related to electrical engineering, including transistor circuits and voltage-current relationships. Students are required to show their work, make approximations, and write their answers on the exam page.

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2012/2013

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UNIVERSITY OF CALIFORNIA AT BERKELEY
College of Engineering
Department of Electrical Engineering and Computer Science
R.W. Brodersen Midterm Exam EECS 140
(3/11/04) Spring 2004
Name:________________________ SID:______________________
-Show your work.
-Make approximations to be within 10%.
-Write your answers on this page for 5 points.
Use the following parameters:
-Assume all (W/L)=2, unless otherwise shown in the circuit as
-Kn’=Kp’=10
-4
A/V
2
-n=p=0.01
-=0.2 V
1/2
-2
f
=0.6 V
-Vto,n=Vto,p=0.3 V
-Assume all substrates tied to appropriate supply unless otherwise shown in the circuit.
pf3
pf4
pf5

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UNIVERSITY OF CALIFORNIA AT BERKELEY

College of Engineering Department of Electrical Engineering and Computer Science

R.W. Brodersen Midterm Exam EECS 140 (3/11/04) Spring 2004

Name:________________________ SID:______________________

-Show your work. -Make approximations to be within 10%. -Write your answers on this page for 5 points.

Use the following parameters:

-Assume all (W/L)=2, unless otherwise shown in the circuit as -Kn’=Kp’=10-4^ A/V^2

  • n=p=0.
  • =0.2 V1/ -2f=0.6 V -Vto,n=Vto,p=0.3 V -Assume all substrates tied to appropriate supply unless otherwise shown in the circuit.

Vin V

out

-1 V

1 V

100 K

50 K

a) What is Vin to set Vout=0?

Iout

1 V

-1 V

0 V

Rout

10K 10K

20 uA

Vout

a) What is the maximum output voltage, Vout?

b) If Iout = 10 μA, what is Rout?

vin

-1 V

1 V

Vout

10 K 10 K

10 uA

iout

Assume the DC voltage at Vout is 0 V:

a) What is = (^) Vout = 0 in

out v

i Gm?

b) What is Rout?

1 V

-1 V

0.2V

10 uA

(2)

vout

(4)

(2)

v1 v

a) What is the DC voltage at output node, vout?

b) What is the gain v 1 v 2

vout