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Posted Date: 14 Jul 2009 Posted By: satish Member Level: Diamond
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2009 Jawaharlal Nehru Technological University B.Tech Bio-Engineering Code No: 3221106 ,Jntu II B. Tech II Semester Regular Examinations, April/May 2009 , BIO TRANSDUCERS AND APPLICATIONS Question paper
Code No: 3221106 Set No. 4
II B.Tech II Semester Regular Examinations, April/May 2009
BIO TRANSDUCERS AND APPLICATIONS
(Bio-Medical Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. (a) What is aliasing? Explain how it can be minimized?
(b) What is the effect of hysteresis in biomedical transducers explain in detail?
[8+8]
2. What is thermistor? Give the basic science of the thermistor with circuit symbols
and packing style. A thermistor has a positive temperature coefficient of +0.002
/
/0c at 250c . What is its resistance at 98.60c if the normal resistance is 12.1k
? [3+6+7]
3. Explain the method of linearization in a thermistor thermometer. With a neat
circuit diagram explain the linearized thermistor temperature measuring circuit.
[6+10]
4. (a) Explain the principle of a strain gauge.
(b) Derive the gauge factor of a strain gauge. [8+8]
5. Explain about the velocity transducers based on electromagnetic principle. De-
scribe one application with neat schematic. [16]
6. Explain the role of physical parameters in hydraulically coupled catheter transduc-
ers. [16]
7. Write short notes on:
(a) Transit time flow methods.
(b) Implantable pressure transducers.
(c) Intra vascular thermister probe.
(d) Water filled plethysmography. [4x4]
8. Design an oscillator (F.M), which is used to transmit biological data.
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