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### EE2203 ELECTRONIC DEVICES AND CIRCUITS ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER NOV/DEC 2010, IMPORTANT QUESTIONS, 2 MARKS AND 16 MARKS QUESTIONS FOR EEE DEPARTMENT

Sunday, September 25, 2011 ·

EE 2203 ELECTRONIC DEVICES AND CIRCUITS ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER NOV/DEC 2010, IMPORTANT QUESTIONS, 2 MARKS AND 16 MARKS QUESTIONS FOR EEE DEPARTMENT

ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER  EE2203 ELECTRONIC DEVICES AND CIRCUITS NOV/DEC 2010, IMPORTANT QUESTIONS, 2 MARKS AND 16 MARKS QUESTIONS FOR EEE DEPARTMENT

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2010
Third Semester
Electrical and Electronics Engineering
EE 2203 — ELECTRONIC DEVICES AND CIRCUITS
(Regulation 2008)
Time : Three hours Maximum : 100 Marks
PART A — (10 × 2 = 20 Marks)
1. Define Knee voltage of a diode.
2. What is peak inverse voltage?
3. Name the operating modes of a transistor.
4. What are hybrid parameters?
5. Draw the high frequency model of JFET.
6. Write the AC input impedance of a Darlington Transistor.
7. Mention the operating modes of MOSFET.
8. Mention any two high frequency LC oscillators.
9. Write the frequency equation of an Astable multivibrator.
10. What is Schmitt Trigger?
PART B — (5 × 16 = 80 Marks)
11. (a) (i) Explain the operation of FWR with centre tap transformer. Also
derive the following for this transformer. (6)
(ii) dc output voltage (4)
(iii) dc output current (2)
(iv) RMS output voltage. (4)
Or
(b) Explain the following regulator circuits :
(i) Transistorized shunt regulator. (8)
(ii) Zener diode shunt regulator. (8)
12. (a) Describe the static input and output characteristics of a CB transistor
with neat circuit diagram. (16)
Or
(b) Derive the expression for current gain, input impedance and voltage gain
of a CE Transistor Amplifier. (16)
13. (a) Explain the construction of N channel JFET. Also explain the drain and
transfer characteristics of the same. (16)
Or
(b) (i) Describe the operation of common drain FET amplifier and derive
the equation for voltage gain. (12)
(ii) In the common drain FET amplifier of above Let
. 35 ; 50 ; 4 K r K R d S = = = ยต Evaluate the voltage gain V A . (4)
14. (a) Derive the equation for differential mode gain and common mode gain of
a differential amplifier. (8 + 8 =16)
Or
(b) Draw and explain the operation of a Hartley oscillator. Derive the
equation for fe r h f and . (16)
15. (a) Explain the working of UJT as a relaxation oscillator with necessary
wave forms and equations. (16)
Or
(b) (i) Draw the circuit of a monostable multivibrator and explain. (14)
(ii) What are the applications of monostable multivibrator? (2)