B.E-B.E Electronics and Communication Engineering Electronic Circuits II (Sathyabama University, Chennai, Tamil Nadu-2011)
Monday, 19 August 2013 07:42Duraimani
SATHYABAMA UNIVERSITY
(Established under section 3 of UGC Act,1956)
Course & Branch :B.E - P-ECE
Title of the Paper :Electronic Circuits – II Max. Marks:80
Sub. Code :SECX1013 (2010-2011) Time : 3 Hours
Date :15/11/2011 Session :AN
PART - A (10 x 2 = 20)
Answer ALL the Questions
1. State the Barkhausen criterion for Oscillator.
2. Draw the frequency response of amplifier with feedback
3. Mention the features of crystal oscillators.
4. State the conditions for oscillators.
5. What are the functions of resonant circuit in a tuned amplifier?
6. Mention the applications of class C tuned amplifier.
7. What are the applications of Schmitt trigger circuit?
8. Why is the astable multivibrator referred to as a free running oscillator?
9. Mention any two applications of blocking oscillator.
10. Draw the circuit diagram of miller saw tooth generator.
PART – B (5 x 12 = 60)
Answer All the Questions
11. Explain the various steps in the methodology of feed back amplifier analysis.
(or)
12. Derive suitable expression for the effects of negative feed back on amplifier input and output resistances.
13. With a neat circuit diagram obtain an expression for the frequency of oscillation of a colpitt’s oscillators.
(or)
14. Explain the wein bridge oscillator and derive its frequency of oscillation.
15. Discuss about double tuned amplifier.
(or)
16. What is the need for neutralization in tuned amplifier? Explain a narrow band and a broad band neutralization method used.
17. Draw the circuit of a collector-coupled transistor astable multivibrator. Sketch the base and collector wave form and explain the circuit operation.
(or)
18. Sketch the circuit of a bistable multivibrator and explain the circuit operation.
19. With a neat sketch, describe the principle of operation of monostable blocking oscillator with emitter timing.
(or)
20. Draw the circuit of transistor bootstrap ramp generator and explain how the circuit operates.
| Earning: ₹ 4.65/- |
