JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III SIGNAL CONDITIONING CIRCUITS Previous Question Paper (May/June - 2019 - R15)
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. Each question carries 10 marks.
Part A
What is meant by Negative Temperature Coefficient?
Answer
A Negative Temperature Coefficient (NTC) refers to a material property where the electrical resistance decreases as the temperature increases. This behavior is characteristic of semiconductors and thermistors used in temperature sensing applications.
List at least two bridges used for capacitance measurements.
Answer
Two common bridges used for capacitance measurements are the De Sauty's bridge and the Schering bridge.
What is electro meter circuit?
Answer
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List two transducers used for displacement measurement.
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What is chopper?
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Briefly explain the working of composite amplifiers.
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Write the basic criteria for oscillation.
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List three methods for velocity measurements.
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List two sensors based on FETs.
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How is biosensor different from normal sensor?
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Unit I
With a neat diagram explain the working of Differential amplifier.
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Explain in brief about Shield grounding.
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Explain how Wheatstone bridge can be used in deflection measurement.
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Explain the working of two operational amps instrumentation amplifier.
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Unit II
Explain in brief about the linearization of bride measurements.
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Explain the Electrostatic shields in detail.
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Explain the working of LVDT in detail with neat sketch.
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Explain the working of Digital-to-Resolver Converters.
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Unit III
List the precautions to be taken while designing an electrometer circuit.
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Explain auto zero amplifiers.
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Explain the working of chopper amplifier with a neat diagram.
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Unit IV
With a neat diagram explain the working of vibrating wire strain gauges.
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Explain the frequency measurement in detail.
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Explain about resonant sensors.
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Discuss about sensor buses.
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Unit V
Write a brief note on CMOS Image Sensors.
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List at least three applications of fiber optic sensors.
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Write a brief note on Thermometers based on Semiconductor junctions.
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