CCE 301 Midterm, Fall 2011
American University of Science and Technology · Electronics · 9 pages · Dr. Adel Chit
More CCE 301 files
Show the text of this exam
CCE301: Electronics Midterm Exam Dr. Adel Chit (Beirut)
Dr. Fadi Fayad (Saida)
Dr, Adel Chit (Zahle)
AMERICAN UNIVERSITY OF SCIENCE & TECHNOLOGY
DEPARTMENT OF COMPUTER AND COMMUNICATIONS ENGINEERING
CCE 301: Electronics
Fall Term 2011-2012
Midterm Exam
April 21, 2011
Student Name: __________________________
ID Number: _______________
CLOSED BOOK (90 Minutes)
IT IS IMPORTANT THAT YOU READ AND UNDERSTAND THE FOLLOWING:
Questions are not allowed during the examination. If you believe that there is ambiguity in a specific
question, simply write your own assumptions and proceed with the answer.
The CHEATING penalty will result in an F in the course.
Mobile Phones are strictly prohibited in the examination hall.
Programmable Calculators are not allowed in this exam.
Borrowing of any material is not permissible.
Write your Name and ID Number in the indicated space of the question booklet.
You may use the back of any page of for scratch or for your answers.
Do not detach any sheet from the question booklet.
This exam consists of 9 pages. Make sure that you have the correct number of pages.
THE WHOLE EXAM SHOULD BE MADE ON THIS QUESTION BOOKLET
ANY OTHER SUBMISSION IS NOT GOING TO BE GRADED
YOU NEED TO SHOW ALL OF YOUR WORK TO GET COMPLETE CREDIT.
Good Luck!
PROBLEM
POINTS
1
: 20
2
: 20
3
: 20
4
: 20
5
: 20
SCORE:
/100
1
CCE301: Electronics Midterm Exam Dr. Adel Chit (Beirut)
Dr. Fadi Fayad (Saida)
Dr, Adel Chit (Zahle)
Problem 1 (20 Points)
Analyze the circuit below to determine the voltages VB and VC and the currents IC.
2
CCE301: Electronics Midterm Exam Dr. Adel Chit (Beirut)
Dr. Fadi Fayad (Saida)
Dr, Adel Chit (Zahle)
Problem #2 (20 points)
a.
Determine the maximum and minimum load currents for which the zener diode
will maintain regulation.
b. What is the minimum value of RL that can be used?
Vz = 12 V, Izk = 0.25 mA, PD = 600 mW, Zz = 10 Ω
RL
+24 V
R1
3
CCE301: Electronics Midterm Exam Dr. Adel Chit (Beirut)
Dr. Fadi Fayad (Saida)
Dr, Adel Chit (Zahle)
Problem 3
(20 Points)
Determine the most probable failures, if any, in each of the circuits below, based on the
indicated measurements.
4
CCE301: Electronics Midterm Exam Dr. Adel Chit (Beirut)
Dr. Fadi Fayad (Saida)
Dr, Adel Chit (Zahle)
5
CCE301: Electronics Midterm Exam Dr. Adel Chit (Beirut)
Dr. Fadi Fayad (Saida)
Dr, Adel Chit (Zahle)
Problem 4 (20 Points)
a. Analyze the circuit below to determine the DC voltages VB, VC and VE at the transistor terminals with
respect to ground. (15 points)
b. Find the coordinates of the Q-point. (5 points)
6
CCE301: Electronics Midterm Exam Dr. Adel Chit (Beirut)
Dr. Fadi Fayad (Saida)
Dr, Adel Chit (Zahle)
7
CCE301: Electronics Midterm Exam Dr. Adel Chit (Beirut)
Dr. Fadi Fayad (Saida)
Dr, Adel Chit (Zahle)
Problem 5 (20 points)
For the shown circuit:
a. Determine Vout at Izk and IzM. (10 points)
b. Calculate the value of R that should be used. (5 points)
c.
Determine the value of RL that can be used. (5 points)
Vz = 15 V, Iz = 20 mA, Izk = 0.5 mA, PD = 1000 mW
RL
Vz
+
Vin
24 V
R1
8
CCE301: Electronics Midterm Exam Dr. Adel Chit (Beirut)
Dr. Fadi Fayad (Saida)
Dr, Adel Chit (Zahle)
9