Download GTU BE/B.Tech 2019 Winter 7th Sem New 2171102 Biomedical Instrumentation Question Paper

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Subject Code: 2171102

GUJARAT TECHNOLOGICAL UNIVERSITY

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SEMESTER- VII (New) EXAMINATION — WINTER 2019

Subject Name: Biomedical Instrumentation

Time: 10:30 AM TO 01:00 PM

Instructions:

1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1

1. Define the terms: Action Potential and Resting Potential. (03)
2. With neat figures, explain the depolarization and repolarization process. (04)

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3. Draw and thoroughly explain the generalized medical instrumentation system. (07)

Q.2

1. What is an electrode? With the help of neat figures, explain needle electrodes. (03)
2. Explain in detail the micro-electrodes. (04)
3. Explain the following terms with neat figures: Hysteresis, Response time, Sensitivity, Precision (07)

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OR

1. Explain the signal processing tactics for improved sensing. (07)

Q.3

1. Explain various noise reduction strategies. (03)
2. What is an instrumentation amplifier? State its utilities and applications. (04)

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3. With the help of neat figure, explain the human heart functioning. (07)

OR

1. What is a biopotential? State various types of biopotentials available from the human body. (03)
2. Draw and explain the ECG amplifier with right-leg and shield drive. (04)
3. With the help of neat figure, explain the ECG machine mechanism. (07)

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Q.4

1. Describe the basic approaches for protection against shock. (03)
2. With a neat figure, explain the structure of a neuron. (04)
3. With the help of neat figures, explain the 12-lead system used in ECG measurement. (07)

OR

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1. Explain the organization of the nervous system. (03)
2. Discuss physiological effects of electricity and important susceptibility parameters. (04)
3. Explain the 10-20 system for EEG recording with neat figures. (07)

Date: 05/12/2019

Total Marks: 70

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Q.5

1. A signal has an amplitude of 1 mV and is contaminated with 0.5 mV of noise. Calculate the unprocessed SNR, the processed SNR for 1000 repetitions of the signal and the processing gain. (04)
2. Draw and explain various EEG rhythms. (07)
3. Draw and explain an EEG telemetry system block diagram. (03)

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OR

1. For a typical EEG preamplifier (instrumentation amplifier), R3=R5= 100 kO, R4=4 kO, R6= 10 kO and R7= 100 kO. Calculate the output voltage for the differential EEG input signal of 100 µVp-p. (04)
2. Briefly explain the block diagram of an eight-channel EEG recording system. (07)
3. Draw and explain the block diagram of a visual and auditory evoked potential system. (03)

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