Electronics Engg 3RD SEMESTER Anna University Previous Question Papers & 3RD SEMESTER SYLLABUS

Electronics Engg

3RD SEMESTER PAPER

3RD SEMESTER SYLLABUS

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EC 256 COMMUNICATION ENGINEERING Question paper EEE Fifth semester

COMMUNICATION ENGINEERING Question paper EEE Fifth semester

EC 256 — COMMUNICATION ENGINEERING

(Common to Electronics and Instrumentation Engineering and Instrumentation and Control Engineering)

Time : Three hours Maximum : 100 marks

Answer ALL questions.

PART A — (10 ? 2 = 20 marks)

1. State the primary mode of microwave propagation? What factors determine the range of it?
2. Define (a) Passive Satellite (b) Active Satellite.
3. Define Nyquist sampling rate.
4. What is the operation of a Compander?
5. What is meant by coherent reception in data transmission?
6. How the probability of error can be reduced in data transmission?
7. What are the advantages of fiber optics over wire systems?
8. Define characteristic impedance of a cable.
9. What are the video and audio IF carrier frequencies?
10. Define (a) luminance signal (b) chrominance signal.

PART B — (5 ? 16 = 80 marks)

11. Give a detailed comparison of (i) data transmission systems (ii) digital modulation systems.
12. (a) Explain the direct method of FM generation.
Or
(b) Draw the block diagram of an AM superheterodyne radio receiver and explain the function of each block.
13. (a) Explain in detail :
(i) Quantization
(ii) Companding
with regard to pulse code modulation scheme.
Or
(b) (i) Describe the slope overload error and the ways to minimize it.
(ii) Compare the various pulse modulation schemes.
14. (a) Explain in detail about TDM.
Or
(b) Explain the essential components of an optical communication system.
15. (a) Sketch the block diagram of a monochrome television receiver and explain.
Or
(b) (i) Explain interlaced scanning.
(ii) Sketch the electron gun in a typical CRT. Explain briefly how the electron beam is focussed.

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EC2204 SIGNALS AND SYSTEMS ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER APRIL/MAY 2010 FOR ECE DEPARTMENT ...

EC2204 SIGNALS AND SYSTEMS ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER   APRIL/MAY 2010 FOR ECE DEPARTMENT ...

B.E./B.Tech. DEGREE EXAMINATION, APRIL/MAY 2010

Third Semester

Electronics and Communication Engineering

EC2204 — SIGNALS AND SYSTEMS

(Regulation 2008)

Time: Three hours Maximum: 100 Marks

Answer ALL Questions

PART A — (10 × 2 = 20 Marks)

1. Define unit impulse and unit step signals.
2. When is a system said to be memoryless? Give an example.
3. State any two properties of Continuous – Time Fourier Transform.
4. Find the Laplace transform of the signal ) ( ) ( t u e t x at − = .
5. State the convolution integral for continuous time LTI systems.
6. What is the impulse response of two LTI systems connected in parallel?
7. State the Sampling theorem.
8. State the sufficient condition for the existence of DTFT for an aperiodic
sequence ) (n x .
9. Define one sided Z-transform and Two-sided Z-transform.
10. Define the shifting property of the discrete time unit Impulse function.

PART B — (5 × 16 = 80 Marks)

11. (a) Distinguish between the following:
(i) Continuous Time Signal and Discrete Time Signal. (4)
(ii) Unit step and Unit Ramp functions. (4)
(iii) Periodic and Aperiodic signals. (4)
(iv) Deterministic and Random signals. (4)
Or
(b) (i) Find whether the signal ) 1 4 ( sin ) 1 10 ( cos 2 ) ( − − + = t t t x is periodic
or not. (4)
(ii) Find the summation ∑∞
− =
−
8
2 ) 2 (
n
n n e δ . (4)
(iii) Explain the properties of unit impulse function. (4)
(iv) Find the fundamental period T of the continuous time signal




+ =
6
10 cos 20 ) (
π
πt t x . (4)
12. (a) (i) Find the trigonometric Fourier series for the periodic signal ) (t x
shown in the figure given below : (10)
(ii) Explain the Fourier spectrum of a periodic signal ) (t x . (6)
Or
(b) (i) Find the Laplace transform of the signal
) ( ) ( ) ( t u e t u e t x bt t a − + = − − . (8)
(ii) Find the Fourier transform of
t e t x
− = ) ( for 1 1 ≤ ≤ − t
otherwise 0 = . (8)
 132  132  132 
E 3074 3
13. (a) (i) Explain the steps to compute the convolution integral. (8)
(ii) Find the convolution of the following signals: (8)
) ( ) ( 2 t u e t x t − =
) 2 ( ) ( + = t u t h .
Or
(b) (i) Using Laplace transform, find the impulse response of an LTI
system described by the differential equation
) ( ) ( 2
) ( ) (
2
2
t x t y
dt
t dy
t d
t y d = − − . (8)
(ii) Explain the properties of convolution integral. (8)
14. (a) (i) Find the Fourier Transform of
N n
N n A n x
> =
≤ =
0
) (
. (8)
(ii) Explain any four properties of DTFT. (8)
Or
(b) (i) Find the Z-transform of the given signal ) (n x and find ROC.
( ) ( ) sin ( ) o
x n w n u n =     . (10)
(ii) Describe the sampling operation and explain how aliasing error can
be prevented. (6)
15. (a) (i) Find the impulse response of the discrete time system described by
the difference equation
) 1 ( ) ( 2 ) 1 ( 3 ) 2 ( − = + − − − n x n y n y n y . (8)
(ii) Discuss the block diagram representation for LTI discrete time
systems. (8)
Or
(b) (i) Describe the state variable model for discrete time systems. (8)
(ii) Find the state variable matrices A, B, C, D for the equation
) 2 ( 6 ) 1 ( 5 ) ( ) 2 ( 2 ) 1 ( 3 ) ( − + − + = − − − − n x n x n x n y n y n y . (8)

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EC 2202 Data Structures and Object Oriented Programming (DS OOPS) in C++ Nov/Dec 2009 question paper - ECE 3rd sem- previous year Question Papers

EC 2202 Data Structures and Object Oriented Programming (DS OOPS) in C++ Nov/Dec 2009 question paper - ECE 3rd sem- previous year Question Papers

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2009

Third Semester

Electronics and Communication Engineering

EC 2202 — DATA STRUCTURES AND OBJECT ORIENTED

PROGRAMMING IN C++

(Regulation 2008)

Time : Three hours Maximum : 100 Marks

Answer ALL Questions

PART A — (10 × 2 = 20 Marks)

1. When do we declare a member of a class static?

2. Why is it necessary to overload an operator?

3. What is an abstract class?

4. What does ‘this’ pointer point to?

5. What is deque?

6. What is a heap and mention its types?

7. What is AVL tree?

8. When does a graph become tree?

9. What is the worst case and best case time complexity of binary tree sort?

10. What is indexed sequential search?

PART B — (5 × 16 = 80 Marks)

11. (a) (i) What is a friend function? What are the merits and demerits of

using friend function? (8)

(ii) Define a class ‘string’. Use overload ‘= =’ operator to compare two

strings. (8)

Or

(b) (i) What is a parameterized constructor? Explain with example. (8)

(ii) What is a conversion function? How is it created? Explain its

syntax. (8)

12. (a) (i) Describe the syntax of multiple inheritance. When do we use such

an inheritance? (10)

(ii) What is a virtual function? When do we make a virtual function

‘‘pure’’? (6)

Or

(b) (i) What is a file mode? Describe the various file mode options

available. (8)

(ii) What is an exception? How is an exception handled in C++? (8)

13. (a) Define double linked list. Explain the various operations of double linked

list with algorithm. (16)

Or

(b) (i) What is hashing? Explain the various hash functions with example.

(10)

(ii) What is priority queue? Discuss the array implementation of

priority queue. (6)

14. (a) Discuss the different methods of traversing a binary tree with algorithm.

(16)

Or

(b) Discuss Prim’s and Kruskal’s algorithm for computing the minimal

spanning tree weighted undirected graph. (16)

15. (a) (i) Write a ‘C’ program to implement binary search and compute its

complexity. (8)

(ii) Compare the worst case and best case time complexity of various

sorting techniques. (8)

Or

(b) Explain the all pairs shortest path algorithm with an example. (16)

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EC2203 Digital Electronics B.E. Anna university APRIL / MAY 2011 Question paper

Anna University Chennai B.E./B.Tech

EC2203 Digital Electronics                      

B.E.  Anna university APRIL / MAY 2011 Question paper

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PART 1

PART 2


PART 3

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EC2204 Signals and Systems B.E. Anna university APRIL / MAY 2011 Question paper

Anna University Chennai B.E./B.Tech

EC2204 Signals and Systems                      

B.E.  Anna university APRIL / MAY 2011 Question paper

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PART 1

PART 2


PART 3

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EC2253 Electro Magnetic Fields B.E. Anna university APRIL / MAY 2011 Question paper

Anna University Chennai B.E./B.Tech

EC2253 Electro Magnetic Fields                      

B.E.  Anna university APRIL / MAY 2011 Question paper

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PART 1

PART 2


PART 3

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EC2303 Computer Architecture and Organization B.E. Anna university APRIL / MAY 2011 Question paper

Anna University Chennai B.E./B.Tech

EC2303 Computer Architecture and Organization                        

B.E.  Anna university APRIL / MAY 2011 Question paper

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PART 1

PART 2

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EC2021 Medical Electronics B.E. Anna university APRIL / MAY 2011 Question paper

Anna University Chennai B.E./B.Tech

EC2021 Medical Electronics        

B.E.  Anna university APRIL / MAY 2011 Question paper

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PART 1

PART 2

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EC 2205 Electronic Circuits I B.E. Anna university APRIL / MAY 2011 Question paper

Anna University Chennai B.E./B.Tech

EC 2205 Electronic Circuits I       

B.E.  Anna university APRIL / MAY 2011 Question paper

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PART 1

PART 2

PART 3

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EC 2254 Linear Integrated Circuits B.E. Anna university APRIL / MAY 2011 Question paper

Anna University Chennai B.E./B.Tech

EC 2254 Linear Integrated Circuits      

B.E.  Anna university APRIL / MAY 2011 Question paper

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PART 1

PART 2

PART 3

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EC2354 VLSI Design B.E. Anna university APRIL / MAY 2011 Question paper

Anna University Chennai B.E./B.Tech

EC2354 VLSI Design     

B.E.  Anna university APRIL / MAY 2011 Question paper

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PART 1

PART 2

PART 3

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MA2261-Probability and Random Process B.E. Anna university APRIL / MAY 2011 Question paper

Anna University Chennai B.E./B.Tech

MA2261-Probability and Random Process  

B.E.  Anna university APRIL / MAY 2011 Question paper

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PART 1

PART 2

PART 3


PART 4

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B.E. / B.Tech Electrical Communication Engineering Third Year & Final Year Sample Question Paper

Sample Question Paper

                                                    Third Year

Subject Code	Subject Name
EC 2301	Digital Communication
EC 2302	Digital Signal Processing
EC 2303	Computer Architecture & Organization
EC 2304	Microprocessors and Microcontroller
EC 2305	Transmission Lines and Wave Guides
GE 2211	Environmental Science & Engineering

                                                            Final Year

Subject Code	Subject Name
EC 2401	Wireless Communication
EC 2402	Optical Communication and Networking
EC 2403	RF and Microwave Engineering
EC 2035	Cryptography and Network Engineering
GE 2021	Professional Ethics & Engineering
EC 2027	Advanced Microprocessors
EC 2029	Digital Image Processing

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CS 2311 OBJECT ORIENTED PROGRAMMING B.E. Anna university APRIL / MAY 2011 Question paper

Anna University Chennai B.E./B.Tech

CS 2311 OBJECT ORIENTED PROGRAMMING  

B.E.  Anna university APRIL / MAY 2011 Question paper

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PART 1

PART 2

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EC 2251 ELECTRONIC CIRCUITS II B.E. Anna university APRIL / MAY 2011 Question paper

Anna University Chennai B.E./B.Tech

EC 2251 ELECTRONIC CIRCUITS II  

B.E.  Anna university APRIL / MAY 2011 Question paper

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PART 1

PART 2

PART 3

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EC 2252 COMMUNICATION THEORY B.E. Anna university APRIL / MAY 2011 Question paper

Anna University Chennai B.E./B.Tech

EC 2252 COMMUNICATION THEORY  

B.E.  Anna university APRIL / MAY 2011 Question paper

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PART 1

PART 2

PART 3

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