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

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

Third Semester

Electronics and Communication Engineering

EC2204 — SIGNALS AND SYSTEMS

MOST IMPORTANT QUESTION PAPERS

(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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DIGITAL ELECTRONICS Electronics Question Papers and question papers huge collection with solutions download

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

Third Semester

 DIGITAL ELECTRONICS Electronics Question Papers and question papers huge collection with solutions download

Electronics and Communication Engineering

EC 2203 — DIGITAL ELECTRONICS

(Regulation 2008)

Time : Three hours Maximum : 100 Marks

Answer ALL Questions

PART A — (10 × 2 = 20 Marks)

1. Prove that the logical sum of all minterms of a Boolean function of 2 variables is 1.

2. Show that a positive logic NAND gate is a negative logic NOR gate.

3. Suggest a solution to overcome the limitation on the speed of an adder.

4. Differentiate a decoder from a demultiplexer.

5. Write down the characteristic equation for JK flipflop.

6. Distinguish between synchronous and asynchronous sequential circuits.

7. Compare and contrast static RAM and dynamic RAM.

8. What is PAL? How does it differ from PLA?

9. What are Hazards?

10. Compare the ASM chart with a conventional flow chart.

PART B — (5 × 16 = 80 Marks)

11. (a) (i) Express the Boolean function Z X XY F + = in product of Maxterm.

(6)

(ii) Reduce the following function using K-map technique

( ) ( ) ( ) 6 , 2 14 , 12 , 10 , 8 , 7 , 4 , 3 , 0 , , , d D C B A f + = π . (10)

Or

(b) Simplify the following Boolean function by using Quine-Mcclusky method

( ) ( ) ∑ = 13 , 12 , 10 , 8 , 7 , 6 , 3 , 2 , 0 , , , D C B A F . (16)

12. (a) Design a carry look ahead adder with necessary diagrams. (16)

Or

(b) (i) Implement full subtractor using demultiplexer. (10)

(ii) Implement the given Boolean function using 8 : 1 multiplexer

( ) ( ) ∑ = 6 , 5 , 3 , 1 , , C B A F . (6)

13. (a) (i) How will you convert a D flipflop into JK flipflop? (8)

(ii) Explain the operation of a JK master slave flipflop. (8)

Or

(b) Explain in detail the operation of a 4 bit binary ripple counter. (16)

14. (a) Implement the following Boolean functions with a PLA

( ) ( ) ∑ = 4 , 2 , 1 , 0 , , 1 C B A F

( ) ( ) ∑ = 7 , 6 , 5 , 0 , , 2 C B A F

( ) ( ) ∑ = 7 , 5 , 3 , 0 , , 3 C B A F . (16)

Or

(b) Design a combinational circuit using a ROM. The circuit accepts a three

bit number and outputs a binary number equal to the square of the input

number. (16)

15. (a) Design a three bit binary counter using T flipflops. (16)

Or

(b) Design a negative-edge triggered ‘T flipflop’. (16)

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MEASUREMENTS AND INSTRUMENTATION important modal question papers Anna university

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

 MEASUREMENTS AND INSTRUMENTATION important modal question papers Anna university 

Third Semester

Electricaland Electronics Engineering

EE2201 — MEASUREMENTS AND INSTRUMENTATION

(Regulation 2008)

Time : Three hours Maximum : 100 Marks

Answer ALL Questions

PART A — (10 × 2 = 20 Marks)

1. Differentiate Resolution from Threshold.
2. How are the absolute and relative errors expressed mathematically?
3. What are the essential torques required for operating an instrument?
4. What is phase meter? Mention the types of phase meter.
5. What is an isolation amplifier? Where is it used?
6. State the condition for balance in a Wheatstone bridge.
7. What are the types of printers according to printing methodology?
8. What are the main parts of the cathode ray tube?
9. Differentiate sensor from transducer.
10. Draw the block diagram for 4 bit Analog to Digital Converter.

PART B — (5 × 16 = 80 Marks)

11. (a) Define and explain the static characteristics of an instrument.
Or
(b) (i) Draw and explain the general block diagram of measurement
system.
(ii) Write a note on different types of errors.
12. (a) Describe the construction and working principle of single phase
induction type energy meter. Write a short note on any two adjustments
required in energy meters.
Or
(b) Explain with neat sketch the classification of Instrument Transformers.
Write a note on the errors affecting the characteristics of an Instrument
Transformer.
13. (a) With a neat sketch describe a bridge to determine the unknown
inductance and a bridge to determine the unknown capacitance.
Or
(b) Explain the grounding techniques in detail to reduce the ground loop
interference signal.
14. (a) Describe the LED and LCD display devices.
Or
(b) Describe the direct and frequency modulation magnetic tape recording
types. Give its merits and demerits.
15. (a) What are the selection criteria for the transducer? Explain the working
principle of LVDT with neat sketch and characteristics. Give
advantages, disadvantages and applications of LVDT.
Or
(b) What are the performance parameters of Analog to Digital Converter?
Explain any two basic A/D conversion techniques in detail.

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EE2254 — LINEAR INTEGRATED CIRCUITS AND APPLICATIONS question papers with solution four years huge collection

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

Fourth Semester

Electrical and Electronics Engineering

EE2254 — LINEAR INTEGRATED CIRCUITS AND APPLICATIONS previous year collections

(Regulation 2008)

(Common to Instrumentation and Control Engineering and Electronics and

Instrumentation Engineering)

Time: Three hours Maximum: 100 Marks

Answer ALL Questions

PART A — (10 × 2 = 20 Marks)

1. What is the purpose of oxidation process in IC fabrication?

2. What is parasitic capacitance?

3. List any four characteristics of an ideal OP-Amp.

4. Design an amplifier with a gain of –10 and input resistance of 10 k .

5. Define slew rate and state its significance.

6. An 8 bit DAC has a resolution of 20mV/bit. What is the analog output voltage

for the digital input code 00010110 (the MSB is the left most bit)?

7. Draw the pin diagram of IC 555 timer.

8. Mention any two application of multiplier IC.

9. List the important parts of regulated power supply.

10. What are the advantages of switch mode power supplies?

PART B — (5 × 16 = 80 Marks)

11. (a) Explain the basic processes used in silicon planar technology with neat

diagram.

Or

(b) Discuss the various methods used for fabricating IC resistors and

compare their performance.

12. (a) (i) Explain the functions of all the basic building blocks of an Op-Amp.

(8)

(ii) Explain the application of OPAMP as (1) integrator

(2) differentiator. (8)

Or

(b) Find 0V of the following circuit.

13. (a) Design and explain triangular wave generator using Schmitt trigger and

integrator circuit.

Or

(b) (i) Explain the operation of dual slope ADC. (8)

(ii) Explain the following characteristics of ADC resolution, accuracy,

settling time, linearity. (8)

14. (a) With neat block diagram, explain IC566 VCO operation and discuss any

two applications.

Or

(b) What are the modes of operation of IC555? Derive the expression of time

delay of a monostable multivibrator.

15. (a) With a neat diagram, explain working principle of switch mode lower

supply.

Or

(b) Write brief notes on:

(i) IC MA 78 40

(ii) Optocoupler.

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EC2202 — DATA STRUCTURES AND OBJECT ORIENTED PROGRAMMING IN C ++

ANNA UNIVERSITY QUESTION BANKS FOR ECE, DATA STRUCTURES, ECE THIRD, EEE THIRD, LAB MANUALS, OOPS, QUESTION BANKS, 

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

ThirdSemester

Electronics and Communication Engineering

EC2202 — 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. How is a class declared in C++?

2. What is a scope resolution operator and how can it be used for global variable?3. What is meant by binding?4. How the pointer is implemented in C++?5. Write any two data structures used in Operating System?6. What are the representations of Big and small ‘O’ notations?7. How many trees are possible with 3 nodes?8. What is a spanning tree?9. What is the feature of bucket sort algorithm?10. Define dynamic programming.
examples. (8)
(ii) Explain the importance of constructors and destructors with
example. (8)
Or
(b) What is operator overloading? Overload the numerical operators ‘+’and ‘/’
for complex numbers “addition” and “division” respectively. (16)
12. (a) (i) Define friend class and specify its importance. Explain with
suitable example. (8)
(ii) Discuss Virtual function and polymorphism with example. (8)
Or
(b) (i) Explain the concept of inheritance by considering an example of
“vehicle”. (8)
(ii) Explain the operators used for dynamic memory allocation with
examples. (8)
13. (a) (i) Explain Priority Queues and how are binary heaps used in that. (8)
(ii) Explain the properties of heap. (8)
Or
(b) (i) Write a C ++ program to implement Stack and its operations PUSH
and POP. (10)
(ii) What is hashing? Classify hashing functions based on the various
methods. (6)
14. (a) (i) Traverse the tree given below using Inorder, Preorder and
Postorder traversals. (10)
(ii) Convert the expression ((A + B) * C - (D - E) ^ (F + G)) to equivalent
Prefix and postfix notations. (6)
Or
(b) (i) Convert the given graph with weighted edges to minimal spanning
tree. (10)
(ii) Write a short note on AVL trees. (6)
15. (a) Explain the algorithm of Quicksort by sorting the following set of
numbers as an example:
42 47 52 57 62 37 32 27 22
Or
(b) Describe divide and conquer technique with the help of mergesort. (16)
(b) (i) Convert the given graph with weighted edges to minimal spanning
tree. (10)
(ii) Write a short note on AVL trees. (6)
15. (a) Explain the algorithm of Quicksort by sorting the following set of
numbers as an example:
42 47 52 57 62 37 32 27 22
Or
(b) Describe divide and conquer technique with the help of mergesort. (16)

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Anna university Revaluation Results for 2nd,4th ,6th semster

Dear Prof/Stud

                        Anna university is going to release the second fourth and sixth semester revaluation results by the end of September last week or begin of October.This time paper valuation is moderate only.So Stud/Prof  dont expect much thing.But We pray with god everyone will get good marks.All the best for your results.And Concentrate well on this current semester do well.God Always with you.

To Get Results in your inbox 

Click all the following links and activate it.We are No 1 to  send the results to students inbox.

Have a great future. All the best for final year students who are all preparing for placements 

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How will be the revaluation of 2nd,4th,6th semester ? 

Anna university Revaluation Results for 2nd,4th ,6th semster?ALL RESULTS, how to apply  revaluation for anna university B.E/B.Tech, ALL DEPT, Anna University, HOW TO, ECE, ECE FOURTH, ECE SEVENTH, ECE SECOND, CSE THIRD, EEE THIRD, 

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EEE THIRD SEMESTER

• SUBJECT

•  SYLLABUS

• OTHERS
  

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