JNTU
JNTU B.Tech III IC APPLICATIONS Previous Question Paper (May - 2018 - R13)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit.
Part A
List the parameters which are used to compare logic families.
Answer
The key parameters used to compare logic families are: propagation delay, power dissipation, fan-out, noise margin, and figure of merit (speed-power product).
Draw the diagram of basic gate of 2 input TTL gate.
Answer
A basic 2-input TTL NAND gate consists of a multi-emitter transistor input stage followed by a phase splitter and a totem-pole output stage. The input stage uses a transistor with two emitters connected to the inputs A and B.
Define thermal drift.
Answer
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How fast can the output of an op-amp change by 10V, if its slew rate is 1V/μs?
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What are the limitations of active filters?
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Give the principle of operation of VCO.
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List the applications of PLL.
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Define pull in time and lock range of PLL.
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What is meant by resolution of DAC?
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What is the conversion time of counting type ADC and parallel comparator ADC?
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Part B
Explain the operation of a CMOS transmission gate.
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Classify ICs based on application, device used and chip complexity.
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Discuss the IC interfacing for the case CMOS driving TTL.
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Write short notes on tristate TTL.
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Explain the operation of I-V converter.
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Explain the operation of an integrator using op-amp.
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Explain the operation of instrumentation amplifier.
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Explain the operation of multiplier using op-amp.
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Explain the principle of operation of RC phase shift oscillator and obtain the expression for frequency of oscillation.
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Explain the operation of triangular waveform generator using op-amp.
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Design a notch filter so that fo = 8kHz, Q = 10. Choose C = 500pF.
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Discuss the application of 555 timer as missing pulse detector.
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Design a monostable multivibrator to produce a pulse width of 100ms.
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Discuss the application of 555 timer as a pulse width modulator.
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Draw the functional diagram of 555 timer and explain briefly.
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Discuss the operation of counter type ADC.
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Explain the operation of dual slope ADC.
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Explain the operation of flash type ADC.
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Explain the operation of weighted resistor DAC.
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