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         Code No: R05310401
                                                                                   Set No. 1
                III B.Tech I Semester Regular Examinations, November 2007
                                      LINEAR IC APPLICATIONS
                             (Electronics & Communication Engineering)
         Time: 3 hours                                                                    Max Marks: 80
                                       Answer any FIVE Questions
                                     All Questions carry equal marks



           1. (a) Explain the use of constant bias circuit in operation of di erential ampli er.
               (b) Analyze the dual input balanced output con guration of di erential ampli er
                    using DC.                                                                         [8+8]

           2. (a) Explain how the input o set voltage compensated for?
               (b) How fast can the output of an op - amp change by 10V, if its slew rate is 1
                    V/ s.
               (c) De ne thermal drift & slew rate.                                                 [6+4+6]

           3. (a) Design a di erentiator to di erentiate an input signal that varies in frequency
                    from 10 Hz to about 1KHz. If a sine wave of 1V peak at 1000 Hz is applied
                    to this di erentiator draw the output waveforms.
               (b) Why active di erentiator circuits are not used in analog computer to solve
                   di erential equations.                                                            [10+6]
           4. (a) Explain, How to obtain triangular wave using a square wave generator.
               (b) With the help of a neat circuit diagram explain the working of a logarithmic
                   ampli er.                                                                          [8+8]

           5. (a) De ne Bessel, Butterworth and Chebysher lters, and compare their frequency
                    response.
               (b) Sketch the circuit diagram of band elimination lter and design a wide band-
                    reject having fH =200Hz and fL =1KHz. Assume necessary data. [8+8]

           6. Explain an application in which the 555 timer can be used as Astable multivibrator.
                                                                                                       [16]

           7. (a) Compare R - 2R and weight resistor types of DACs.
               (b) Write short notes on A/D converters.
               (c) De ne the following terms as related to DAC:
                      i. Linearity
                     ii. Resolution.                                                                [8+4+4]
           8. What are all basic blocks of analog multiplexer? Explain how the data selections
              pro cess is performed it.                                                                [16]
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         Code No: R05310401
                                                                                   Set No. 2
                III B.Tech I Semester Regular Examinations, November 2007
                                      LINEAR IC APPLICATIONS
                             (Electronics & Communication Engineering)
         Time: 3 hours                                                                    Max Marks: 80
                                       Answer any FIVE Questions
                                     All Questions carry equal marks


           1. (a) Explain how large open circuit voltage gain of an op - amp can be obtained
                    by using cascading of di erential ampli er stages.
               (b) Explain ac analysis of di erential ampli er.                                          [8+8]
           2. (a) Discuss the Pole - Zero and Dominant pole compensation techniques for an
                    op - amp.
               (b) An op - amp has a slew rate of 1.5V/ s. What is the maximum frequency of
                    an output sinusoid of peak value 10 V at which the distortion sets in due to
                    the slew rate limitation?                                                            [8+8]

           3. (a) Design a di erentiator to di erentiate an input signal that varies in frequency
                    from 10 Hz to about 1KHz. If a sine wave of 1V peak at 1000 Hz is applied
                    to this di erentiator draw the output waveforms.
               (b) Why active di erentiator circuits are not used in analog computer to solve
                   di erential equations.                                                               [10+6]
           4. (a) Describe the operation of logarithmic ampli er using op - amp.
               (b) List the conditions for oscillation in all the three types of oscillators, namely,
                    RC phase shift, Wien - bridge and quadrature oscillators. [8+8]
           5. (a) Draw the wide band reject lter circuit and also the frequency response of it.
               (b) Draw the schematic diagram of an all pass lter and determine the phase shift
                      between the input and output at f = 2kHz.                                          [8+8]
           6. (a) Con gure a 555 timer as a Schmitt trigger and explain.
               (b) Explain frequency translation and FSK demodulation using 565 PLL. [8+8]

           7. (a) Explain the di erence between Analog to Digital converter and Digital to
                    Analog converters through underlying equations.
               (b) Illustrate one application each of Analog to Digital and Digital to Analog
                    converters.                                                                         [6+10]
           8. (a) Explain the function of a typical adjustable voltage regulator. How can you
                    increase the current driving capacity of the regulator?
               (b) Describe the principle of working of a balanced modulator using op - amp.
                    Give the applications of it.                                                        [6+10]
www.studentyogi.com                                                                               www.studentyogi.com

         Code No: R05310401
                                                                                     Set No. 3
                III B.Tech I Semester Regular Examinations, November 2007
                                      LINEAR IC APPLICATIONS
                             (Electronics & Communication Engineering)
         Time: 3 hours                                                                       Max Marks: 80
                                       Answer any FIVE Questions
                                     All Questions carry equal marks



           1. (a) Explain how large open circuit voltage gain of an op - amp can be obtained
                    by using cascading of di erential ampli er stages.
               (b) Explain ac analysis of di erential ampli er.                                         [8+8]

           2. (a) Calculate the e ect of variation in power supply voltages on the output o set
                    voltage for an op - amp circuit.
               (b) Why frequency compensation is required for an op - amp and explain frequency
                   compensation technique using suitable diagrams.                             [6+10]

           3. (a) Design a di erentiator to di erentiate an input signal that varies in frequency
                    from 10 Hz to about 1KHz. If a sine wave of 1V peak at 1000 Hz is applied
                    to this di erentiator draw the output waveforms.
               (b) Why active di erentiator circuits are not used in analog computer to solve
                   di erential equations.                                                              [10+6]

           4. (a) Derive the expression of the output voltage of an antilog ampli er using op -
                    amp.
               (b) Design a saw tooth wave form generator using op - amp and plot the waveforms
                    for the given speci cations frequency: 5kHz, Vsat = ± 15V (Assume necessary
                    data).                                                                      [8+8]

           5. (a) For the all pass lter, determine the phase shift between the input and output
                    at f = 2kHz. To obtain a phase shift , what modi cations are necessary in
                    the circuit?
               (b) Derive the expression for the transfer function of 2nd order High pass lter.
                                                                                                        [8+8]

           6. (a) Explain the operation of Monostable multivibrator using 555 timer. Derive
                    the expression of time delay of a Monostable multivibrator using 555 timer.
               (b) Design monostable multivibrator using 555 timer to produce a pulse width of
                    100 m sec.                                                                         [10+6]

           7. (a) What are the basic blocks preceding an Analog to Digital converter in a typical
                   application like digital audio recording?
               (b) With the help of a neat circuit diagram and waveforms, explain the operation
                   of a dual slope ADC. What are its special features?                                 [6+10]
www.studentyogi.com                                  www.studentyogi.com

         Code No: R05310401
                                                  Set No. 3
               (a) IC 1496 and its applications
               (b) Sample and hold circuit.                   [16]
www.studentyogi.com                                                                           www.studentyogi.com

         Code No: R05310401
                                                                                    Set No. 4
                III B.Tech I Semester Regular Examinations, November 2007
                                      LINEAR IC APPLICATIONS
                             (Electronics & Communication Engineering)
         Time: 3 hours                                                                     Max Marks: 80
                                       Answer any FIVE Questions
                                     All Questions carry equal marks



           1. (a) Discuss the di erences between the di erential ampli ers used in the rst two
                    stages of op - amp.
               (b) Compare and contrast an ideal op - amp and practical op - amp.
               (c) Draw an ideal voltage transfer curve of an op - amp. [8+5+3]

           2. (a) What are the three factors that e ect the electrical parameters of an op - amp
               (b) Compare and contrast an ideal op - amp and practical op - amp.
               (c) What are the features of 741 op - amp and also draw the pin diagram.[3+6+7]

           3. (a) Draw the circuit diagram of a two input non-inverting type summing ampli er
                    and derive the expression for the output voltage.
               (b) Brie y explain why negative feedback is desirable in ampli er applications.
               (c) How does negative feedback a ect the performance of an inverting ampli er?
                                                                                                       [7+5+4]

           4. (a) Derive the expression of the output voltage of an antilog ampli er using op -
                    amp.
               (b) Design a saw tooth wave form generator using op - amp and plot the waveforms
                    for the given speci cations frequency: 5kHz, Vsat = ± 15V (Assume necessary
                    data).                                                                      [8+8]

           5. (a) List the conditions for oscillation in all the three types of oscillators, namely,
                     RC phase shift, Wien - bridge and quadrature oscillators.
               (b) Design an op ? amp based relaxation oscillator and derive the frequency of
                    oscillation.                                                                          [8+8]

           6. (a) Draw the circuit of PLL as frequency multiplier and explain its working.
               (b) Explain with neat diagram how 555 timers can be used as a Schmitt trigger.
                                                                                                         [8+8]

           7. (a) Sketch and explain the transfer characteristic of a DAC with necessary equa-
                    tions.
               (b) LSB of a 9 - bit DAC is represented by 19.6mv. If an input of 9 zero bits is
                    represented by 0 volts.
                      i. Find the output of the DAC for an input 10110 1101 and 01101 1011.
www.studentyogi.com                                                                       www.studentyogi.com

         Code No: R05310401
                                                                               Set No. 4
           8. (a) Describe the operation of four quadrant multiplier with neat diagram.
               (b) Explain the operation of IC 1496 as mixer circuit.                           [8+8]

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  • 1. www.studentyogi.com www.studentyogi.com Code No: R05310401 Set No. 1 III B.Tech I Semester Regular Examinations, November 2007 LINEAR IC APPLICATIONS (Electronics & Communication Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks 1. (a) Explain the use of constant bias circuit in operation of di erential ampli er. (b) Analyze the dual input balanced output con guration of di erential ampli er using DC. [8+8] 2. (a) Explain how the input o set voltage compensated for? (b) How fast can the output of an op - amp change by 10V, if its slew rate is 1 V/ s. (c) De ne thermal drift & slew rate. [6+4+6] 3. (a) Design a di erentiator to di erentiate an input signal that varies in frequency from 10 Hz to about 1KHz. If a sine wave of 1V peak at 1000 Hz is applied to this di erentiator draw the output waveforms. (b) Why active di erentiator circuits are not used in analog computer to solve di erential equations. [10+6] 4. (a) Explain, How to obtain triangular wave using a square wave generator. (b) With the help of a neat circuit diagram explain the working of a logarithmic ampli er. [8+8] 5. (a) De ne Bessel, Butterworth and Chebysher lters, and compare their frequency response. (b) Sketch the circuit diagram of band elimination lter and design a wide band- reject having fH =200Hz and fL =1KHz. Assume necessary data. [8+8] 6. Explain an application in which the 555 timer can be used as Astable multivibrator. [16] 7. (a) Compare R - 2R and weight resistor types of DACs. (b) Write short notes on A/D converters. (c) De ne the following terms as related to DAC: i. Linearity ii. Resolution. [8+4+4] 8. What are all basic blocks of analog multiplexer? Explain how the data selections pro cess is performed it. [16]
  • 2. www.studentyogi.com www.studentyogi.com Code No: R05310401 Set No. 2 III B.Tech I Semester Regular Examinations, November 2007 LINEAR IC APPLICATIONS (Electronics & Communication Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks 1. (a) Explain how large open circuit voltage gain of an op - amp can be obtained by using cascading of di erential ampli er stages. (b) Explain ac analysis of di erential ampli er. [8+8] 2. (a) Discuss the Pole - Zero and Dominant pole compensation techniques for an op - amp. (b) An op - amp has a slew rate of 1.5V/ s. What is the maximum frequency of an output sinusoid of peak value 10 V at which the distortion sets in due to the slew rate limitation? [8+8] 3. (a) Design a di erentiator to di erentiate an input signal that varies in frequency from 10 Hz to about 1KHz. If a sine wave of 1V peak at 1000 Hz is applied to this di erentiator draw the output waveforms. (b) Why active di erentiator circuits are not used in analog computer to solve di erential equations. [10+6] 4. (a) Describe the operation of logarithmic ampli er using op - amp. (b) List the conditions for oscillation in all the three types of oscillators, namely, RC phase shift, Wien - bridge and quadrature oscillators. [8+8] 5. (a) Draw the wide band reject lter circuit and also the frequency response of it. (b) Draw the schematic diagram of an all pass lter and determine the phase shift between the input and output at f = 2kHz. [8+8] 6. (a) Con gure a 555 timer as a Schmitt trigger and explain. (b) Explain frequency translation and FSK demodulation using 565 PLL. [8+8] 7. (a) Explain the di erence between Analog to Digital converter and Digital to Analog converters through underlying equations. (b) Illustrate one application each of Analog to Digital and Digital to Analog converters. [6+10] 8. (a) Explain the function of a typical adjustable voltage regulator. How can you increase the current driving capacity of the regulator? (b) Describe the principle of working of a balanced modulator using op - amp. Give the applications of it. [6+10]
  • 3. www.studentyogi.com www.studentyogi.com Code No: R05310401 Set No. 3 III B.Tech I Semester Regular Examinations, November 2007 LINEAR IC APPLICATIONS (Electronics & Communication Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks 1. (a) Explain how large open circuit voltage gain of an op - amp can be obtained by using cascading of di erential ampli er stages. (b) Explain ac analysis of di erential ampli er. [8+8] 2. (a) Calculate the e ect of variation in power supply voltages on the output o set voltage for an op - amp circuit. (b) Why frequency compensation is required for an op - amp and explain frequency compensation technique using suitable diagrams. [6+10] 3. (a) Design a di erentiator to di erentiate an input signal that varies in frequency from 10 Hz to about 1KHz. If a sine wave of 1V peak at 1000 Hz is applied to this di erentiator draw the output waveforms. (b) Why active di erentiator circuits are not used in analog computer to solve di erential equations. [10+6] 4. (a) Derive the expression of the output voltage of an antilog ampli er using op - amp. (b) Design a saw tooth wave form generator using op - amp and plot the waveforms for the given speci cations frequency: 5kHz, Vsat = ± 15V (Assume necessary data). [8+8] 5. (a) For the all pass lter, determine the phase shift between the input and output at f = 2kHz. To obtain a phase shift , what modi cations are necessary in the circuit? (b) Derive the expression for the transfer function of 2nd order High pass lter. [8+8] 6. (a) Explain the operation of Monostable multivibrator using 555 timer. Derive the expression of time delay of a Monostable multivibrator using 555 timer. (b) Design monostable multivibrator using 555 timer to produce a pulse width of 100 m sec. [10+6] 7. (a) What are the basic blocks preceding an Analog to Digital converter in a typical application like digital audio recording? (b) With the help of a neat circuit diagram and waveforms, explain the operation of a dual slope ADC. What are its special features? [6+10]
  • 4. www.studentyogi.com www.studentyogi.com Code No: R05310401 Set No. 3 (a) IC 1496 and its applications (b) Sample and hold circuit. [16]
  • 5. www.studentyogi.com www.studentyogi.com Code No: R05310401 Set No. 4 III B.Tech I Semester Regular Examinations, November 2007 LINEAR IC APPLICATIONS (Electronics & Communication Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks 1. (a) Discuss the di erences between the di erential ampli ers used in the rst two stages of op - amp. (b) Compare and contrast an ideal op - amp and practical op - amp. (c) Draw an ideal voltage transfer curve of an op - amp. [8+5+3] 2. (a) What are the three factors that e ect the electrical parameters of an op - amp (b) Compare and contrast an ideal op - amp and practical op - amp. (c) What are the features of 741 op - amp and also draw the pin diagram.[3+6+7] 3. (a) Draw the circuit diagram of a two input non-inverting type summing ampli er and derive the expression for the output voltage. (b) Brie y explain why negative feedback is desirable in ampli er applications. (c) How does negative feedback a ect the performance of an inverting ampli er? [7+5+4] 4. (a) Derive the expression of the output voltage of an antilog ampli er using op - amp. (b) Design a saw tooth wave form generator using op - amp and plot the waveforms for the given speci cations frequency: 5kHz, Vsat = ± 15V (Assume necessary data). [8+8] 5. (a) List the conditions for oscillation in all the three types of oscillators, namely, RC phase shift, Wien - bridge and quadrature oscillators. (b) Design an op ? amp based relaxation oscillator and derive the frequency of oscillation. [8+8] 6. (a) Draw the circuit of PLL as frequency multiplier and explain its working. (b) Explain with neat diagram how 555 timers can be used as a Schmitt trigger. [8+8] 7. (a) Sketch and explain the transfer characteristic of a DAC with necessary equa- tions. (b) LSB of a 9 - bit DAC is represented by 19.6mv. If an input of 9 zero bits is represented by 0 volts. i. Find the output of the DAC for an input 10110 1101 and 01101 1011.
  • 6. www.studentyogi.com www.studentyogi.com Code No: R05310401 Set No. 4 8. (a) Describe the operation of four quadrant multiplier with neat diagram. (b) Explain the operation of IC 1496 as mixer circuit. [8+8]