november-december 2011 r07 all in one

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Code No: V3209/R07

III B.Tech II Semester Supplementary Examinations, November/ December 2011 INSTRUMENTATION

(Electrical and Electronics Engineering) Time: 3 Hours Max Marks: 80

Answer any FIVE Questions All Questions carry equal marks

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1. List the different errors in measurement? Explain each in detail? [16]

2. a) Explain the following processes as applied to pulse code modulation i. Quantization process ii. Encoding process.

b) Describe the following modulation processes i. Pulse amplitude modulation. ii. Pulse frequency modulation. [8+8]

3. a) With neat sketch, explain the measurement of phase and frequency using lissajous patterns? b) List the applications of CRO? [10+6]

4. With a neat block diagram explain the micro processor based ramp type digital voltmeter? [16]

5. a) Explain the principle and working of True RMS voltmeter with a neat sketch? b) With a neat sketch, explain the principle and working of peak reading voltmeter? [8+8]

6. a) Write a short note on thermistor and thermocouple with a neat sketch? b) A barium titanate pick up has the dimensions of 5mmx5mmx1.25mm.The force acting on it is 5N.The charge sensitivity of barium titanate is 150 PC/N and its permittivity is 12.5x109 F/M. The force acting on it is 5N. If the modulus of elasticity of barium titanate is 12x106N/m2. Calculate the strain, the charge and the capacitance? [8+8]

7. a) Explain the principle of measurement of torque using magneto-strictive transducer? b) A mild steel shaft is used to connect a motor drive to a constant load torque. A foil strain gauge having a resistance of 120 and a gauge factor 2 is mounted on a shaft with its active axis at angle of 45 degrees to the axis of the shaft. The shear modules of steel is 80 GN/m2, the shaft radius is 15mm and the change in strain gauge resistance due to the load 0.24 . Find the load torque? [8+8]

8. a) Explain the operation of ultrasonic flow meter with neat sketch? b) Explain the measurement of vacuum using pirani gauge? [8+8]

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Code No: V3209/R07




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1. a) Draw the block diagram of the measuring system and explain the each stage? b) Explain briefly the performance characteristics of an instrument? [8+8]

2. List the standard test signals? Explain each in detail? [16]

3. a) What is the minimum distance, L, that will allow full deflection of 4cm at the oscilloscope screen with a deflection factor of 100v/cm and with an accelerating potential of 2000v? b) An electrically deflected CRT has a final anode voltage of 2000 V and parallel deflecting plates cm long and 5mm apart. If the screen is 50 cm from the centre of deflecting plates, find beam speed, deflection sensitivity of the tube and the deflection factor of the tube? [8+8]

4. a) Explain with a neat block diagram of a digital phase angle meter? b) A 4 1/2 digit voltmeter is used for voltage measurements.

i. Find its resolution ii. How would 12.98 volts be displayed on 10 volt range? iii. How would 0.6973 be displayed on 1 volt range? iv. How would 0.6973 be displayed on 10 volt range? [10+6]

5. a) Explain the working of harmonic analyzers with a neat sketch? b) With a neat sketch, explain the principle of working of vector impedance meter? [8+8]

6. a) Explain briefly the photo conductive cells and photo diodes? b) A single strain gauge is mounted to measure the axial strain in a simple tensile member. If the recorded strain is 380 micro strain what is the axial stress.

i. if the member is steel? ii. if the member is aluminum? [8+8]

7. a) Define gauge sensitivity and derive expression for it? b) The strain gauge having a gauge factor of 2 is connected in a bridge circuit having an excitation voltage 8 V. The resistance are equal. It is subjected to a strain of 0.006. If this output is to represent 2/3rd of full scale deflection of a recorder, what should be the gain of the amplifier. The full scale input voltage of the recorder is 1 V? [8+8]

8. a) Explain the principle of thermo couple vacuum gauge? b) Explain the principle of hot wire anemometer for the flow measurement? [8+8]

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Code No: V3209/R07




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1. List the different errors in measurement? Explain each in detail? [16]

2. a) Explain the following processes as applied to pulse code modulation i. Quantization process ii. Encoding process.

b) Describe the following modulation processes i. Pulse amplitude modulation. ii. Pulse frequency modulation. [8+8]

3. a) With neat sketch, explain the measurement of phase and frequency using lissajous patterns? b) List the applications of CRO? [10+6]

4. Write short notes on: a) Digital phase angle meter b) Successive approximation digital voltmeter. [8+8]

5. a) Explain the principle and working of True RMS voltmeter with a neat sketch? b) With a neat sketch, explain the principle and working of peak reading voltmeter? [8+8]

6. a) Write a short note on thermistor and thermocouple with a neat sketch? b) A barium titanate pick up has the dimensions of 5mmx5mmx1.25mm.The force acting on it is 5N.The charge sensitivity of barium titanate is 150 PC/N and its permittivity is 12.5x109 F/M. The force acting on it is 5N. If the modulus of elasticity of barium titanate is 12x106N/m2. Calculate the strain, the charge and the capacitance? [8+8]

7. a) Explain the principle of measurement of torque using magneto-strictive transducer? b) A mild steel shaft is used to connect a motor drive to a constant load torque. A foil strain gauge having a resistance of 120 and a gauge factor 2 is mounted on a shaft with its active axis at angle of 45 degrees to the axis of the shaft. The shear modules of steel is 80 GN/m2, the shaft radius is 15mm and the change in strain gauge resistance due to the load 0.24 . Find the load torque? [8+8]

8. a) Describe pressure measurement Piezoelectric transducers with neat sketches? b) Discuss about the radiation receiving elements used in Radiation pyrometers? [8+8]

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Code No: V3209/R07




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1. a) Draw the block diagram of the measuring system and explain the each stage? b) Explain briefly the performance characteristics of an instrument? [8+8]

2. List the standard test signals? Explain each in detail? [16]

3. a) What is the minimum distance, L, that will allow full deflection of 4cm at the oscilloscope screen with a deflection factor of 100v/cm and with an accelerating potential of 2000v? b) An electrically deflected CRT has a final anode voltage of 2000 V and parallel deflecting plates cm long and 5mm apart. If the screen is 50 cm from the centre of deflecting plates, find beam speed, deflection sensitivity of the tube and the deflection factor of the tube? [8+8]

4. a) Explain with a neat block diagram of a digital phase angle meter? b) A 4 1/2 digit voltmeter is used for voltage measurements.

i. Find its resolution ii. How would 12.98 volts be displayed on 10 volt range? iii. How would 0.6973 be displayed on 1 volt range? iv. How would 0.6973 be displayed on 10 volt range? [10+6]

5. a) Explain the working of harmonic analyzers with a neat sketch? b) With a neat sketch, explain the principle of working of vector impedance meter? [8+8]

6. a) Explain briefly the photo conductive cells and photo diodes? b) A single strain gauge is mounted to measure the axial strain in a simple tensile member. If the recorded strain is 380 micro strain what is the axial stress.

i. if the member is steel? ii. if the member is aluminum? [8+8]

7. a) Define gauge sensitivity and derive expression for it? b) The strain gauge having a gauge factor of 2 is connected in a bridge circuit having an excitation voltage 8 V. The resistances are equal. It is subjected to a strain of 0.006. If this output is to represent 2/3rd of full scale deflection of a recorder, What should be the gain of the amplifier. The full scale input voltage of the recorder is 1 V? [8+8]

8. a) Explain the principle of thermo couple vacuum gauge? b) Explain the principle of hot wire anemometer for the flow measurement? [8+8]

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Code No: V3210/R07

III B.Tech II Semester Supplementary Examinations, November/ December 2011 SWITCH GEAR AND PROTECTION (Electrical and Electronics Engineering)

Time: 3 Hours Max Marks: 80 Answer any FIVE Questions

All Questions carry equal marks *****

1. a) What is resistance switching? Derive the expression for critical resistance interms of system inductance and capacitance, which gives no transient oscillations b) In a short circuit test on a 220 kV, 3-phase CB with earthed neutral the following results were obtained: Fault p.f. = 0.3, recovery voltage = 0.9 of full line value, the breaking current is symmetrical and the restriking transient had a natural frequency of 15 kHz. Determine RRRV, assuming that short circuit is an earthed fault.

2. Describe the construction, principle of operation and application of SF6 circuit breaker. How does this breaker essentially differ from an air blast breaker

3. a) Show that the torque on the disc of on induction disc relay is maximum when the phase difference between the two fluxes is 900.

b) What are the merits and demerits of static relays?

4. a) Describe schemes of protection for an alternator against inter-turn faults when the number of circuits per phase are i) even and ii) odd b) A7.5 MVA, 11kV, 3-phase star connected alternator is protected by Merz-price circulating current system. The star points are earthed through a resistance of 4. If the ratio of the current transformer is 1000/5 and the relay is set to operate when these is an out of balance current of 1.5 Amps. Calculate,

i).The percentage of each phase of the stator winding which is unprotected, ii).The minimum value of earthling resistance to project 90% of the winding.

5. What type of protection scheme is employed for the protection of a large power transformer against short circuits? With neat sketches discuss its working principles

6. a) Compare the merits and demerits of various pilot wire relaying schemes for protection of transmission lines

b) What are the desirable features of the bus bar protection?

7. a) List out the merits of grounding power system neutral b) A 132 kV, 3-phase, 50Hz, overhead line 200 km long consists of three conductor of effective diameter 15mm, arranged in a vertical plane with 5m spacing and regularly transposed. Find the inductance and 2.5 kVA rating of the arc suppression coil in the system.

8. a) Explain the zinc-oxide lighting arrester with neat diagram b) What are volt-time curves? What is their significance in power system studies?

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1. a) Discuss the recovery rate theory and energy balanced theory of arc interruption in a circuit breaker b) A circuit breaker is rated at 1100 A, 1500 MVA, 33 kV, 3-Sec, 3-phase oil circuit breaker. Determine the following:

i) Rated normal current, ii) Breaking capacity, iii) Rated symmetrical breaking current, iv) Rated making capacity v) Short time rating and vi) Rated service voltage

2. Describe the construction, operating principle and application of vacuum circuit breaker. What are its merits over conventional type CB? For what voltage rating is it recommended.

3. a) What are the various types of distance relays? Compare their merits and demerits b) Describe the construction, principle of operating and application of induction cup type of relay

4. a) What are the abnormal conditions in a large alternator against which protection is necessary b) A three phase, 25MVA, 11kV, star connected alternator has a synchronous reactance of 3 per phase and resistance 0.7 per phase. It is being protected by Merz-price remains unprotected and if the neutral of the alternator is earthed through a resistance of 5 ohms. Assume that the operates when the out of balance current exceeds 25% of the load current. Determine what portion of the alternator windings is unprotected.

5. Explain the principle of Merz-price system of protection used for power transformer. What are the limitations of this scheme and how are they overcome

6. a) Describe the various schemes of protection of feeders b) Explain the differential protection scheme of bus bar with neat diagram

7. a) Explain the phenomenon of arcing ground and suggest the method to minimize the effect of this phenomenon b) A 50Hz transmission line has a capacitance of 0.2F per phase. Determine the inductance of person coil to neutralize the effect of capacitance of i) complete length of line, ii) 85% of length of line and iii) 75% of the length of the line

8. a) Explain the term insulation coordination? Describe the construction of volt-time curve and the terminology associated with impulse testing b) Describe the construction and principle of operation of value type lightning arrester

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1. a) What are the different types of CB when the arc quenching medium is the criterion? Mention the voltage rating for which a particular type of CB is recommended b) In a short circuit test on a 132 kV, 3- system the breaker gave the following results: Power factor of the fault = 0.25, Recovery voltage = 0.85 of full line voltage. The breaking is symmetrical and the restriking transient had a natural frequency of 16 kHz. Determine the rate of rise of restriking voltage in the following types of faults

i) Ground fault and ii) Ungrounded fault.

2. With a neat sketch, describe the working principle of an axial air blast type circuit breaker. Explain why resistance switching is used with this type of CB.

3. a) Define differential protection. Describe the principle of circulating current differential protection and give its applications

b) Explain the directional impedance relay be means of its characteristics on R-X plane

4. a) What is restricted earth fault protection for alternator? Why is this form of protection used for alternator even though it does not provide protection for the complete winding b) A 11 kV, 75 MVA alternator is provided with differential protection. The percentage of winding to be protected against phase to ground fault is 7%. The relay is set to operate when there is 20% out of balance current. Determine the value of the resistance to place in the neutral to ground connection.

5. Describe the construction, principle of operation and applications of Buchholtz relay. Why is this form of protection an ideal protection scheme with neat diagram.

6. a) What is translay relay? Give such a scheme of protection for a 3-phase transmission lines

b) Explain the protection of bus bars? List out various types of bus bar protections

7. a) Explain the un-grounding system with neat diagram b) In a 50Hz transmission line has capacitance of one line to earth was 3.2 F. It was decided to use an earth fault neutralizer. Calculate the reactance neutralize the capacitance of

i) 100% of the length of the line ii) 75% of the length of line iii) 50% of the length of line

8. a) What are the causes of over voltages arising on a power system? Why is it necessary to protect the lines against over voltages b) Describe the construction and the operation of metal oxide surge arrester

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Code No : V3210/R07




1. a) Explain how arc is initiated and sustained in a circuit breaker when the CB contacts separate b) At 3-phases, 50Hz alternator is connected to the bus bars through an oil circuit breaker. Due short circuit occurring at the bus bars the circuit breaker opens when the r.m.s value of the current was 8000 amperes. Determine an expression for restriking voltage. Assume that the reactance of each phase of the alternator is 3 mH and the capacitance of earth between the circuit breaker and the alternator is 1.2 10-3 F.

2. What are the different types of air blast CB? Discuss their operating principle and area of applications. Which types is less affected by current chopping

3. a) Explain the principle of operation of an induction disc relay with relevant diagram b) Classify the various types of over current relays and give their applications along with approximate characteristics

4. a) Describe the rotor protection of alternator against earth fault b) A 3-phase, 12 MVA, 6.6 kV alternator supplies a load of 7.5 MVA at 0.85 p.f and is being protected through Merz-price circulating current system and its relays are so set that they do not operate until the out of balance current occurs 20% of full load current. Calculate the value of earth resistance to be provided in order to ensure that only 10% of the alternator winding remains unprotected. Assume alternator reactance of 10%. Neglect resistance of the alternator.

5. a) What protective devices other than the differential protection are used for the protection of a large transformer? Briefly describe them b) A 60 MVA, 132/33 kV, / , 3-

power transformer is protected by percentage differential relays. If the CTs located on delta and wye side of the power transformers are 300/5 A and 2200/5 A respectively Calculate i) The output current of fault load, ii) The relay current at fault load and iii) The minimum relay current setting to permit 25% over load.

6. a) What is carrier current protection? For what voltage range is it used for the protection of transmission lines? What are its merits and demerits

b) Explain 3-zone distance relay protection using impedance relays.

7. a) What are the various methods of neutral grounding? Compare their performance b) A 220 kV, 3-phase, 50Hz, 300 km transmission line has a capacitance to earth of 0.021 F/ phase. Find the inductance and kVA rating of the Peterson coil used for earthing the above system.

8. a) Explain the protection against lightning over voltages b) What are BILS? Explain their significance in power system studies

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Code No: V3218/R07

III B.Tech II Semester Supplementary Examinations, November/ December 2011 DIGITAL SIGNAL PROCESSING

(Common to Electrical and Electronics Engineering, Electronics& Communications Engineering, Electronics and Instrumentation Engineering)



1. (a) A signal y(n) is governed by the recursive equation )()1(2)( nnyny += with y(0)=4. Find y (2), y (3). Is the signal bounded or not?

(b) Determine the impulse response and unit step response of the system described by the difference equation.

i) )()2(08.0)1(6.0)( nxnynyny += ii) )2()(2)2(1.0)1(7.0)( += nxnxnynyny

2. (a) If X(K) denotes the N-point DFT of an N-Point sequence x(n), show that with N even and if x(n) = x(N-1-n) then X(N/2)=0.

(b) Consider a sequence x(n) = {2, 1, 1, 1} and T = 0.5 compute its DFT and compare it with its DTFT.

3. An 8 point sequence is given by x(n) = {2, 2, 2, 2, 1, 1, 1, 1}. Compute 8 point DFT of x(n) by

(a) Radix 2 DITFFT (b)Radix 2 DIFFFT

4. (a) Determine the impulse response of the system described by the difference equation

)1(2)()2(4)1(3)( += nxnxnynyny using Z transform.

(b) Determine the direct form II realization for the following system: )2(252.0)(7.0)2(72.0)1(1.0)( =+ nxnxnynyny

5. (a) Convert the following analog filter with transfer function . .

into a digital IIR filter by using bilinear transformation method. The digital IIR filter is having a resonant frequency of Wr = pi/2. (b)Design a digital filter that will pass a 1Hz signal with attenuation less than 2dB and suppress 4Hz signal down to at least 42dB from the magnitude of the 1Hz signal.

6. (a) Explain briefly the method of designing FIR filter using Fourier series method (b)Design a linear phase low pass filter with a cut-off frequency of pi/2 radians/seconds. Take N=7

7. (a)Explain Multirate Digital Signal Processing. (b)Consider ramp sequence and sketch its interpolated and decimated versions with a factor of 3.

8. (a)Draw and explain the bus architecture of DSP processors. (b)Explain the implementation of convolver with single multiplier/adder.

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1. (a) Find the impulse and step responses for the given system: ).1(2)()1()( =+ nxnxnyny

(b)Test the following systems for linearity, time invariance, causality and stability. 1. .|)(|)( nxany = 2. ).()2()( nx

FfnSinny pi=

2. (a)State and prove time and frequency shifting properties of DFT. (b)Determine the 8-point DFT of the signal x[n] = {1, 1, 1, 1, 0, 0, 0, 0} and sketch its magnitude and phase.

3. (a)Explain what you understand by Bit reversal and In - place computation. (b)Implement the decimation in time FFT algorithm for N=16.

4. (a)Define stability and unstability of a system. Test the condition for stability of the first order IIR filter governed by the equation ).1()()( += nbxnxny (b)Obtain the cascade structure for the system function defined by:

.

)2811

431

2121)(+

++=

ZZ

ZZzH

5. Design a digital low pass filter with pass band cut off frequency P=0.375pi with P=0.01 and stop band frequency S=0.5pi with S=0.01.The filter is to be designed with bilinear transformation method. What is the order of Butterworth and Chebyshev approximations?

6. (a)Outline the steps involved in the design of FIR filter using windows. (b)Design a low pass digital FIR filter using Kaiser Window satisfying the specifications given below. Pass band cut-off frequency = 150 Hz. Stop band cut-off frequency = 250 Hz. Pass band ripple = 0.1dB Stop band attenuation = 40 dB Sampling frequency = 1000 Hz

7. (a)Consider ramp sequence and sketch its interpolated and decimated versions with a factor of 3. (b)Discuss the applications of Multirate Digital Signal Processing.

8. (a)What are the advantages of DSP processors over conventional microprocessors? (b)Briefly explain the special addressing modes available in DSP processors.

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1. (a)What are causal and Non-causal systems? Why are non-causal systems unrealizable? (b)By direct evaluation of the convolution sum, determine the step response of a c Linear shift-invariant system whose unit-sample response h(n) is given by

.10),()(

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1. (a)Consider a discrete linear time invariant system described by the difference equation:

)1(31)()2(

81)1(

43)( +=+ nxnxnynyny

Where y(n) is the output and x(n) is the input. Assuming that the system is relaxed initially obtain the unit sample response of the system. (b)Define causality and stability of LSI system and state the conditions for stability.

2. (a)State and prove any four properties of Discrete Fourier Transform. (b)Define DFT of a sequence x (n). Obtain the relationship between DFT and DTFT.

3. (a)Summarize the steps of radix2 DITFFT algorithm and draw the flow graph. (b)Evaluate the 8-point DFT for the following sequences using DIT-FFT algorithm.

1 for 3 n 3 x(n) =

0 otherwise

4. (a)Explain the different structures for realization of IIR system. and explain how conversion can be made from direct form I structure to direct form II structure. (b)Realize the given system in cascade and parallel form

+

+

+=

22

2111

4111

1211

)(ZZZZ

ZzH .

5. (a)Compare Butter worth and Chebyshev approximations. (b)An analog integrator is described by a transfer function

SsH a

1)( = i. Obtain a digital integrator using bilinear transformation method. ii. Obtain the difference equation for the digital integrator relating

Input x (n) to the output y (n).

6. (a)Show that an FIR filter is linear phase if h (n) = h (N-1-n). (b)The desired response of a low pass filter is

ej3w, 3pi w (3pi/4) Hd(ejw) =

0, (3pi/4) |w| pi Determine H(ejw) for M=7 using a Hamming window..

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7. (a) Obtain the necessary expression for Interpolation process. (b)Consider a signal ).()()( nunSinnx pi=

i. Obtain a signal with a decimation factor 2 ii. Obtain a signal with a interpolation factor 2.

8. (a)Draw and explain the bus architecture of DSP processors. (b)Explain the features of TMS320C54x DSP processor.

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Code No: V3207/R07

III B.Tech II Semester Supplementary Examinations, November/ December 2011 MICRO PROCESSORS AND MICRO CONTROLLERS



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1. (a).Give the difference between the minimum mode and maximum mode of operation in 8086 microprocessor. (b) Explain about memory segmentation and instruction queue.

2. (a).Give the assembly language implementation of the following: (i) FORLOOP (ii) REPEAT (iii) IF-THEN-ELSE (iv) WHILE

(b) Explain the machine language instruction formats of 8086.

3. (a). Draw 8255 internal architecture and explain? (b). Explain different modes of operation of 8255.

4. (a). What is the need for DMA data transfer? (b).With a neat sketch explain the internal architecture of 8259A.

5. write short notes on the following (a). Trouble shooting (b). Prototyping

6. (a) Discuss the salient features of 8051 family microcontrollers. (b). Draw and describe various pins of 8051?

7. (a) .What is interrupt vector table of 8086? Explain its structure. (b). Explain different types of interrupts in 8051?

8. (a). Discuss the applications of Microcontrollers. And explain them briefly. (b). Elaborate the need of a dedicated keyboard display controller.

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Code No: V3207/R07




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1. (a). Draw the block diagram of 8086 and explain BIU and EU? (b) Draw and explain the 8086 timing diagram during the write operation.

2. (a). Develop an 8086 assembly language program to find the sum of numbers from 1 to 100. (b). Differentiate between procedures and macros using certain examples.

3. Draw 8255 internal architecture and explain each par of it.

4. (a) Explain the cascaded mode operation of 8259 with a neat block diagram (b)Discuss the properties of DMA request inputs of 8257.

5. With a neat sketch draw the internal architecture of USART 8251 and explain its different status, mode and control formats in detail.

6. (a). Explain the addressing modes of 8051? (b). Explain the stack structure of 8086 in detail.

7. (a). Explain the various modes of operation of timer/counters in 8051? (b) Explain the baud rate in the 8051.

8. (a). Explain about interfacing seven segment display? (b). what is push button? Explain its operation.

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Code No: V3207/R07




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1. (a). Explain with examples various addressing modes of 8086 instruction set with suitable instruction format? (b) What is an instruction? Explain various instruction formats with examples.

2. (a) List out the assembler directives of 8086, and explain them? (b).Write an ALP in 8086 to exchange a block of N bytes of data between source and destination.

3. (a) Explain the Programmed I/O and Interrupt driven I/O in detail. (b) Explain the operation of a parallel comparator A/D converter.

4. (a) Draw and discuss the internal architecture of 8259A? (b) Explain the interrupt sequence in 8086 system

5. (a) Explain the general bus operation of IEEE- 488. (b) Briefly explain about software debugging tools.

6. (a). Explain the stack structure of 8086 in detail. (b). How does 8051 differentiate between the external and internal program memory.

7. (a). Write 8051 program to generate 2 kHz square waves on pin P1.0 of port 1 using Timer interrupt. (b). Describe the hardware features of 8051.

8. (a). Explain how microcontroller used as a traffic signal controller. (b). Elaborate the need of a dedicated keyboard display controller.

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Code No: V3207/R07




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1. (a) Explain 8086 based minimum mode system with the help of neat diagram. (b). Describe in detail about the register organization of 8086 microprocessor.

2. (a) Write an assembler program that adds two given 4-digit BCD numbers. (b) What do you mean by a macro? What are the differences between a macro and a subroutine?

3. (a). Explain the different control word formats of 8255 PPI. (b) Explain the analog to digital converter.

4. (a) Discuss the properties of DMA request inputs of 8257. (b).Bring out the difference between static and dynamic Ram.

5. Explain briefly about (a) Serial communication standards (b). software debugging tools

6. (a). Draw and discuss interrupt structure of 8086 in detail? (b). explain about any four signal descriptions of 8051.

7. (a). Enlist the salient features of 8051 family of microcontrollers (b). Explain the operation of linear counter functions.

8. (a) Discuss the advantages of microcontroller based system over microprocessor based systems. (b).Briefly explain about interfacing seven segment display? What are its applications?

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Code No: V3219/R07

III B.Tech II Semester Supplementary Examinations, November/ December 2011 VLSI DESIGN

(Common to Electrical and Electronics Engineering & Electronics and Communications Engineering & Bio-Medical Engineering)



1. Explain with neat diagrams the nMOS transistor fabrication process.

2 For a CMOS inverter, calculate the shift in the transfer characteristic when the p

n

ratio is varied from 1 to 10.

3 Draw the stick diagram and a mask layout for an 8:1 nMOS inverter circuit. Both the input and output points should be on the Polysilicon layer. Also explain the diagram.

4 a) How are large capacitive loads driven? b) How do we estimate CMOS inverter delay?

5 Construct a color-code stick diagram to represent the design of integrated nMOS and CMOS structures in 8:1 MUX. Explain the diagram.

6 a) Draw a neat CPLD cell structure and explain. b) What are the different types of ASICs and the design constraints?

7 Explain how a pseudo-random sequence generator may be used to test a 16 bit data path.

8 Write a note on HDL design circuits i. Package body and declaration

ii. Delay modeling in VHDL. *****

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Code No: V3219/R07





1 What are the characteristics on which the figure of merit of a transistor model depends? Explain

2. Explain the process of BiCMOS fabrication in an n-well process.

3. What are the effects of scaling on device parameters? Derive the expressions of parameters.

4. A particular section of layout includes a 3 wide neutral path which crosses a 2 wide polysilicon path at right angles. If the layers are separated by 0.5um thick layer of silicon dioxide, find the capacitance between the two layers.

5. a) What are the different choices of layers? b) What is the propagation delay in pass transistor chain? Derive the overall delay for n sections.

6. a) What are basic blocks in a CPLD and FPGA cell? Give a detailed diagram of each microcell. b) How does LUTs help in implementing circuits on FPGAs?

7. a) What is a TAP controller? b) Explain the fault model in CMOS circuits.

8. Write a brief note on a. Critical path delay in a design. b. Behavioral model Vs. structured model in HDL.

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Code No: V3219/R07





1. Explain the flow diagram of Bukeley n- well fabrication.

2. How can we enhance CMOS Processes to increase routing of circuits, Provide high quality capacitors and provide resistors of variable characteristics

3. Though scaling down gives the desirable effects in a device, why further miniaturization of device not allowed? What are the limitations of scaling? Explain.

4. A layer of MOS circuit has resistivity = 1 ohm cm. A section of this layer is 55 m long and 5 m wide and its thickness of 1 m calculate the resistance from one end of the section to other. What is the value of sheet resistance Rs?

5. Construct a stick diagram for a CMOS Parity generator. The required responses is Z=1 if there are even number of ones on inputs and Z=0 if there are odd ones. Explain the diagram.

6. a) With an example, explain the CMOS chip design using programmable interconnect. b) Give a brief note on PLDs.

7. a) Explain the need for CMOS testing? b) Explain serial scan testing procedure?

8. Write a brief note of VHDL design units with examples. *****

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Code No: V3219/R07





1. Compare Bi CMOS technology with CMOS and Bipolar technologies.

2. In an inverter circuit, define ZPU and Zpd. also derive a relation between them in nMOS inverter derived from another nMOS inverter.

3. Draw the models of metal interconnect and electro optical interconnection along with their equivalent circuits and explain.

4. An off chip capacitance load of 10PF is to be driven from CMOS inverter. Set out suitable arrangement giving appropriate channel L: W ratios and dimension. Calculate the number of inverter stages required and the delay by the overall Circuit to drive 10PF load.

5. Draw a transistor circuit diagram of shift register capable of holding and shifting 4 bit word. Explain the circuit operation.

6. Design a square generator of given 4 bit binary number using PROM device.

7. a) Draw a clocked field programmable logic array structure and explain its operation. b) How CPLDs are different from FPGAs.

8. Write a brief note on (a) Configuration declaration in HDL (b) LUTs & slice in FPGAs *****

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Code No: V3208/R07

III B.Tech II Semester Supplementary Examinations, November/ December 2011 MANAGEMENT SCIENCE

(Common to Electrical and Electronics Engineering & Electronics and Communications Engineering & Chemical Engineering & Electronics and Computer Engineering)



1. (a) How do you define Motivation? Explain Maslows theory of human needs. (b) Explain Hedsburg two factor motivational theory.

2. Define Planning. What are the steps involved in planning.

3. (a) What is a line and staff relation? (b) How they affect the organization structure?

4. Explain various functions of Marketing. What is product cycle?

5. (a)What is environmental scanning? (b)Explain the role of internal environmental scanning in strategy formation.

6. What is work study? Explain the procedure involved in method study.

7. Write short notes on following: (a) Management Information system (b) Total quality management (c) Supply chain management (d) Training and development

8. From the following information draw the network and identify the critical path and project duration.

Activity i - j

To (days)

Tm (days)

Tp (days)

1-2 12 16 22 1-3 6 14 18 1-4 10 14 20 2-6 8 16 28 2-7 16 20 24 3-6 16 20 24 4-5 8 12 16 5-6 6 10 12 6-8 14 20 30 7-8 10 16 24

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Code No: V3208/R07





1. (a) Explain the Scientific Management Principles developed by Fredrick Taylor. (b) How the Scientific Management principles are different from Administrative Management Principles.

2. What is Matrix organization how it is different from committee organization?

3. What is product cycle? Explain briefly various cycles in product development.

4. (a) How the personnel Management is different from Human Resource Management? (b)What are the functions of Human Resource Management?

5. What is strategic planning? Explain the role of SWOT analysis in strategy formation.

6. What is plant layout? Explain the various principles of plant layout.

7. Write short notes on the following: (a) channels of distribution (b) Recruitment and selection (c) Product Mix (d) Total quality management

8. From the following data crash the network and identity the optimum time of the project where the indirect cost is estimated Rs.2000 per day.

Activity Normal Time(days)

Normal Cost ( Rs.)

Crash Time(days)

Crash Cost ( Rs.)

1-2 8 4000 4 12000

2-3 10 3000 4 7500

2-4 14 3600 10 6000

3-4 8 5000 4 10000

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Code No: V3208/R07





1. (a)Explain the Herzbergs Two-factor Theory of Motivation (b)How it is different from other Motivational theories.

2. What are the elements of planning? Explain the process of planning.

3. (a) Explain various functions of Marketing. (b) Explain various elements of Marketing Mix.

4. Explain the difference between the following: (a) Mission (b) Goals (c) Strategy (d) Policy

5. What is work study? Explain the procedure involved in method study.

6. (a)Explain the purchase procedure followed in stores management (b)What is the importance of ABC analysis in inventory management?

7. Write short notes on following: (a) Management Information system (b) Enterprise Resource Planning (ERP) (c) Just-In-Time (JIT) (d) Training and development

8. From the following information draw the network and identify the critical path and project duration.

Activity i - j

To (days)

Tm (days)

Tp (days)

1-2 6 8 11 1-3 3 7 9 1-4 5 7 10 2-6 4 8 14 2-7 8 10 12 3-6 8 10 12 4-5 4 6 8 5-6 3 5 6 6-8 7 10 15 7-8 5 8 12

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Code No: V3208/R07


(Common to Electrical and Electronics Engineering & Electronics and Communications Engineering & Chemical Engineering Electronics and Computer Engineering)



1. Explain various leadership styles? What is Social responsibility of Management?

2. (a)Explain the important features of Matrix organization. (b)How it is different from committee organization?

3. What is product cycle? Explain briefly various cycles in product development.

4. What is performance appraisal? How do you appraise the performance of the employee?

5. (a )What is Environmental scanning? (b)Explain the role of SWOT analysis in strategy formation.

6. What is plant layout? Explain the various principles of plant layout.

7. Write short notes on the following: (a) channels of distribution (b) Control Charts (c) EOQ (d) Total quality management

8. From the following data crash the network and identity the optimum time of the project where the indirect cost is estimated Rs.2000 per day. Activity Normal

Time(days) Normal

Cost ( Rs.) Crash

Time(days) Crash

Cost ( Rs.) 1-2 4 2000 2 6000 2-3 5 1500 2 3750 2-4 7 1800 5 3000 3-4 4 2500 2 5000

*****

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november-december 2011 r07 all in one

Documents

neat sketch

neat block diagram

principle of measurement

deflection factor

gauge factor

measurement of phase

pulse frequency modulation

deflection sensitivity