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BTCSE36,BTEE33,BTETE33

V SEMESTER B.TECH EXAMINATION, JANUARY-2013

COMPUTER ORGANIZATION Time: 3 Hours Max. Marks: 75

GROUP A : Answer any three questions. (Question No. 1 is compulsory)

Q.1 Give the organization of first generation computer? (05)

Q.2 Compare Architecture Versus Implementation. (10)

Q.3 Explain the organization of CPU. (10)

Q.4 Explain the concept of parallel computation. (10)

Q.5 Explain in detail how data is represented. (10)

GROUP B : Answer any three questions. (Question No. 6 is compulsory)

Q.6 What is an operating System? (05)

Q.7 Explain overall organization of the MIPS RX000. (10)

Q.8 What arithmetic and Logic Functions are computed by 7418/ALU When S=S3

S2 S1, S0=1100 B) A useful logic operation if 74181 is Exclusive-OR Function

A B? What values showed S, M, and C have in this case? (10)

Q.9 Draw a logic diagram showing how to construct a microprogram Sequencer

for a) 64 12 bit control memory b) 12 64 bit control memory, using one or

more copies of the Amp. (10)

Q.10 Show a block diagram for data transfer from CPU to an interface and then to

an I/0 device. Determine a procedure for setting and clearing the Flag bit.

(10)

GROUP C: All Questions are Compulsory.

Q.11 Fill in the blanks (each question carries 2 marks)

(i) A sequential circuit is an interconnection of flip-flop and __________.

(ii) _______ is the most popular storage medium to large data, which are

sequentially accessed and processed.

(iii) The ________ is some time called the primary memory of a computer system.

(iv) A _________ can assume either a register-to-register architecture or memory-

to-memory architecture.

(v) _________ Instruction use an implied accumulator register for all data

manipulation.

Q.12 Multiple choice questions: (Each question carries 2 marks)

(i) The Stack pointer is a –

(i) 8 bit register (ii) 16 bit register (iii) 32 bit register (iv) none

(ii) The ROM is a-

(i) volatile memory(ii) nonvolatile memory (iii) both a & b(iv) none

(iii) The 8297 is –

(i) 40 pin device (ii) 41 pin device (iii) 42 pin devise(iv) none

(iv) The 8085 microprocessor has _____ interrupt inputs-

(i) 3 (ii) 4 (iii) 5 (iv) none

(v) The time required to complete one operation of an instruction is called

(i) T-state (ii) Instruction cycle (iii) Machine cycle(iv) none

Q.13 True or false (each question carries 1 mark).

(i) A multiprocessor system is an interconnection of two or more CPUs with

memory and I/O equipment.

(ii) A computer will usually have one type of instruction code format.

(iii) Pipelining is a technique of decomposing a sequential process into sub

operations.

(iv) Swap-in means lifting the program from the memory and placing it on

the disk.

(v) Virtual memory is a technique that allows the execution of process that is

completely in memory

******

BTEE34, BTETE34, BTME34


CONTROL SYSTEM Time: 3 Hours Max. Marks: 75


Q.1 Write note on synchronous. (05)

Q.2 The unit step response of a system is given as

C(t) = 5/2 + 5t - 5/2e-2t

Find the transfer function of the system. (10)

Q.3 Give an example of a physical system whose transfer function

model has a pole in the right. (10)

Q.4 What is advantage of Bode plot over Nyquist plot? (10)

Q.5 Draw the Bode plot for a system having (10)

G(s) =)2.01)(05.01(

3

sss, H(s) = 1

Determine.

(a) gain cross over frequency and corresponding phase margin

(b) phase cross aver frequency and corresponding gain-margin

(c) stability of the closed-loop system (10)


Q.6 Explain open loop system. (05)

Q.7 Explain Signal flow graph. (10)

Q.8 Explain Write down the short notes on the following (10)

(a)LVDT (b) Synchro

Q.9 Explain Nyquist criterion for stability and briefly describe phase margin and

gain margin. (10)

Q.10 State and Explain Manson’s gain formula. (10)



(i) The closed loop transfer function is given by _______

(ii) Mason’s gain formula for signal flow graph is given by________

(iii) For a PID controller , the ratio of control variable u (t) and error signal e(t) is

given by______

(iv) The Laplace transform of ramp signal is given by_________.

(v) In a second order under damped system d is equel to_______. .

Q.12 Multiple choice question. (Each question carries 2 marks)

(i) The characteristic equation of an armature controlled D.C. motor is of:

(a) Zero order equation (b) First order equation

(c) Second order equation (d) Third order equation

(ii) The best method of analyzing system response is with the following input

(a) Ramp input signal (b) Unit impulse input signal

(c) Exponentially decaying signal (d) Sinusoidal input signal

(iii) Introduction to negative feedback in a system does not lead to decrease in

(a) Instability (b) Distortion

(c) Overall gain (d) Bandwidth

(iv) The difference of the reference input and output signal is called

(a) Error signal (b) Controlling signal

(c) Actuating signal (d) None of these (v) A good control system should have all the following characteristics except

(a) Good stability (b) Good accuracy

(c) Slow response

(d) Sufficient power handlingcapacity


(i) A small signal is one which controls a large amount of power and is therefore

suitable for actuating signal device.

(ii) A tacho-generator is an electromechanical device , which produces an output

voltage that is proportional to its shaft speed.

(iii) The steady state error is determined by ess = s 0Lim s R(s) / 1+ G(s)

(iv) The value of damping ratio increases with increase in peak overshoot.

(v) The bode plot is a logarithmic plot and commonly used for time

response.

******

BTETE35


COMMUNICATION ENGINEERING

Time: 3 Hours Max. Marks: 75


Q.1 Explain external and internal noise and contamination non linear distortion.

(05)

Q.2 With a block diagram explain low level and high level AM transistor. (10)

Q.3 Write the difference between Amplifier and frequency modulation. Write their

advantages and disadvantages. (10)

Q.4 Explain with circuit diagram biased diode limiter and zener diode limiter. (10)

Q.5 Draw phaser diagrams showing operation of radio detector. Write its working

principles advantages and disadvantages. (10)


Q.6 Discuss components of or elements of basic communication system. (05)

Q.7 A signal is transmitted over a transmission line which reduces it in power in a

ratio of 20:1. It then passes over another section of the line which reduces it in

a ratio of 7:1. Calculate the net reduction in power. (10)

Q.8 What is the need of modulation? (10)

Q.9 Convert (19)10 to binary number & (119)10 to octal number. (10)

Q.10 What is modulation? Define amplitude modulation. (10)



(i) Shanon’s equation which gives the channel capacity of the system as_______.

(ii) 2’s complement of (-18)10 is ________.

(iii) In pulse – modulation wave, the actual transmitted signal is ______.

(iv) Characteristics of DS1 line signal standard are ________.

(v) The S/N ratio at detector for WBFM is given by ________.


(i) In high power AM transmission, modulation is done at

(a) Botter stage. (b)RF power stage. (c) Oscillator stage.

(ii) In Fm the bandwidth can take only.

(a)Integer values of we. (b) Integer values of wn. (c) Any value of wm.

(iii) The sampling rate is always between

(a) O and 2W (b) W and 2W (c) 2W and 4W

(iv) The base band pulse signals can be sent over wire pairs of a few miles in

length at speeds of up to.

(a) 100 bits/see. (b) 300 bits/see.(c) 800 bits/see.

(v) A compander compresses the range of signal amplitudes.

(a) Before transmission. (b) At the receiving and (c) Both of these.


(i) As the band width increases. The mean-square error 2E decreases.

(ii) The faster the roll-off, the smaller the peak-to-peak ripple in the pass-band.

(iii) One’s complement of (-14)10 is 10001.

(iv) Common transmit unit (ctu) performs quantizing and encoding functions.

(v) In AM transmission, the frequency which is not transmitted is lower side

frequency.

******

BTETE36


SEMICONDUCTOR DEVICES



Q.1 Compare chock, shunt & LC filter? (05)

Q.2 An LC filter has a full wave rectified L/P of peak value Vm applied to it. If no

bleeter resistor is employed, what is the no load dc voltage? (10)

Q.3 Explain under what conditions can the inductor in a π type CLC filter be

replaced by a resistor? (10)

Q.4 How does the out put of a diode clamper with a sinusoidal input differ from

the output shunt rectifier & filter combination with the same input in.

(a) Waveform

(b) DC Voltmeter reating (10)

Q.5 Draw a ckt of a half wave voltage septupler that provides a positive dc voltage

of approximately 7Vm & Explain. (10)


Q.6 Define: - (a) The pinch – off voltage (b) Channel ohmic region

(c) Drain resistance (d) Transconductance

(e) IDSS (f) IGSS (05)

Q.7 (a) What method is used to bias FET against device and temperature

variations? Explain how this is effective.

(b) What do transfer curves for an FET consist of?

(c) What is a bias line? What does it imply if the bias line is not very streep

(10)

Q.8 (a) How is the ability of an amplifier to provide gain for the differential

signal but reject the common-mode signal indicated?

(b) What is this called when expressed in decibels?

(c) What is the expression that gives the output voltage from a true differential

amplifier? (10)

Q.9 Explain the difference between positive and negative logic, giving an example

of each as applied to voltage levels? (10)

Q.10 Explain how HTL is essentially DTL modified to provide speed than DTL,

especially when working into the same capacitive load. Include the terms

passive and active – pull – up in your discussion. (10)



(i) The IC chip is mounted to its package base by ______.

(ii) The primary advantage of integrated circuits over discrete components is

_____.

(iii) Monolithic IC means _____.

(iv) Low yields of acceptable ICs are ______.

(v) The photo resist process means ______.

Q.12 Multiple choice question. (Each question carries 2 marks)]

(i) Monolithic IC wafers are typically

(a) 11/2 in diameters (b) 50 mils square

(c) 5 mils square

(ii) Silocon dioxide is used as a

(a) diffusing element (b) mask against diffusion

(c) contact material

(iii) Functional testing of the IC wafer is performed during

(a) probe testing (b) final testing

(c) both a and b

(iv) The etching process inclves

(a) removal of the photo resist

(b) removal of the silicon dioxide coating .

(c) scribing lines on the wafer prior to dicing .

(v) An integrated circuit contains 30 gates, each of which consist of 4

components, this is an example of

(a) large scale integration (LSI)

(b) medium scale integration (MSI)

(c) small scale integration (SSI)


(i) The term microelectronic is restricted to monolithic IC

(ii) N-type silicon is formed by doping pure silicon with boron.

(iii) Photo masking controls the depth of diffusion.

(iv) Circuit probing is a destructive test to remove faulty circuits

(v) Metallization is used to provide solely bonding pads.

******

BTETE37


DIGITAL IMAGE PROCESSING



Q.1 Describe the calorimetry concepts. (05)

Q.2 What is effect of imperfect reconstructions filters? (10)

Q.3 What is Aliasing effects? Describe the effects with its proper analyzer. (10)

Q.4 How can interpolation function be defined? Give proper diagrams. (10)

Q.5 What is generalized 2-D linear operator? (10)


Q.6 What do you mean by image representation? (05)

Q.7 Distinguish between the singularity operators & additive linear

operator? (10)

Q.8 Define the Mech band & Simultaneous. Contras? Describe the monochrome

vision model with its necessary diagrams. (10)

Q.9 Describe the Binary image shrinking with diagrams. (10)

Q.10 How can Interpolation function be defined give 4 proper diagram & give the

effect of imperfect reconstruction filters? (10)



(i) Interpolation wave from is defined mathematically as ________.

(ii) ________ is a discrete sifting summation by which image array can be

represented at some point (m1, m2) as a sum of amplitude weighted Dirac

delter functions.

(iii) The sine transform, introduced by Jain (17) is given as ________.

(iv) ________ is the symbol for Generalised dilation.

(v) The Bhattacharyya distance (B-distance for simplicity) is a scalar function of

the probability densities of features of a pair of classes defined as ________.


(i) Intensity of the light into the eye is controlled by

(a) cornea. (b) Retina.

(c) Iris (d) lens.

(ii) The total power emitted by a radiant source is,

(a) 0P T(7) d7 (b)

0P E(7) d7

(c) 0P S(7) d7 (d)

0P C(7) d7

(iii) The two – dimensional unitary transform written in vector form is given by

(a) f = Af (b) F = AcT

RFA

(c) F = BCT

RFB (d) F = Bf

(iv) The probability function P(X0) =M

1 is which order process in Jvlesz texture

fields.

(a) Zero order (b) First order

(c) Second order (d) Third order.

(v) G (j, k) = F (j, k) H (j, k) is the symbol for

(a) Reflection (b) Translation

(c) Dilation (d) Erosion.


(i) Fourier transform is a non-linear operator.

(ii) Non-linear response of eye occurs near the rods and cones.

(iii) The finite-area operator is a linear filtering process performed on a discrete

image data array.

(iv) In linear Edge crispering impulse response array H is of low-pass form.

(v) Diagonal edge detection gradients can be obtained by forming running

differences of diagonal pairs of pixels.

******

BTETE38P-I

V SEMESTER B TECH IN ELECTRONIC

TELECOMMUNICATION ENGINEERING EXAMINATION

JANUARY-2013

CONTROL SYSTEM

Time: 1 hours (5X5=25)

PART - A

Instructions: 1) ANSWER ALL QUESTIONS.

1. Draw and Explain of a Closed Loop System.

2. State and Explain Manson's gain formula.

3. Descibe elements of Automatic or Feedback Control Syatem.

4. Draw schematis diagram and explain Tachogenrator.

5. Draw and explain LVDT.

BTETE39P-II

V Semester B Tech in Electronic Telecommunication

Engineering Examination

JANUARY-2013

SEMICONDUCTOR DEVICES

Time: 1 hours (5X5=25)

Instructions: 1) ANSWER ALL QUESTIONS.

PART - A

1 Sketch a circuit to display the characteristics curves for an NPN transistor on an

oscilloscope?

2 What is the main advantage of a CE over a CB as far as biasing is concerned?

3 What is early effect? What does it account for in the transistor characteristic curves?

4 Why is nonlinear distortion referred to as harmonic distortion?

5 Draw and explain center tapped full wave rectifier.

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