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2003 Course Biomedical Electronics

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[3764] 252 *3764252* B.E. (Electronics) Examination, 2010 BIOMEDICAL ELECTRONICS (2003 Course) Time : 3 Hours Max. Marks : 100 Instructions : 1) Answers to the two Sections should be written in separate books. 2) Neat diagrams must be drawn wherever necessary. 3) Black figures to the right indicate full marks. SECTION I 1. a) Explain the meaning of action potential, resting potential, depolarization and repolarization of a cell with necessary diagram. b) Explain the application of microelectrode, skin surface electrode and needle electrode. OR 2. a) Give the classification of transducers with examples. Explain the strain guage pressure sensor in detail. b) State and explain the sensor performance characteristics in detail. 3. a) Draw and explain the cardiovascular circulation in detail. b) Describe the Einthoren s triangle and its use in interpreting ECG waveforms. OR 4. a) Draw the schematic design of the main stages of a bio-potential amplifier and explain the functioning of a preamplifier and filter. b) What is the input guarding used in instrumentation amplifier ? Explain the instrumentation amplifier providing input guarding. 5. a) Explain the concept of phonocardiography with the help of basic heart sounds and primary signal characteristic. b) State any six points which are available from Echo-cardiogram analysis. Comment on the resolution obtained due to Echo-cardiogram. OR 6. a) Describe the intensive care unit monitoring architecture with the help of neat diagram. b) What are the basic requirements of implantable pacemaker ? With the help of block diagram, explain the operation of ventricular synchronous demand pacemaker. 9 9 9 9 8 8 8 8 8 8 8 8 P.T.O. *3764252* [3764] 252 SECTION II 7. a) Show the different arrangements for a basic colorimeter analysis and a schematic for measuring the concentration of a substance in a solution. Explain the basic colorimeter analysis. b) Explain the basic working principle of spectrophotometry with the help of neat diagram. OR 8. a) Draw and explain the working of flame photometer. Also show the essential parts of flame photometer in schematic form. 9 9 9 b) What are the problems in the measurement of PO2 . Explain the principle of operation with the help of a diagram of PO2 electrode with platinum cathode. 9 9. a) Draw and explain the working of electroencephalograph machine with necessary waveform. 8 b) With the help of neat sketch, explain the 10-20 system of electrode placement. OR 8 10. a) State the four major types of continuous rhythmic sinusoidal EEG activity. Explain any one in detail. 8 b) Explain the anatomy of the central nervous system with necessary diagram. 8 11. a) State the three processes to form laser beam. Explain any one in detail with the help of neat diagram. 8 8 b) Give the comparison between Ruby laser and He-Ne laser. OR 12. a) Explain the basic working principle of Magnetic Resonance Imaging System. 8 b) What is a CT scanner ? Explain the technique of producing CT images. 8 B/I/10/1,355

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