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Medical Electronics Question Paper

Medical Electronics

Course:Diploma In Medical Engineering

Institution: Mount Kenya University question papers

Exam Year:2011

MT KENYA UNIVERSITY
SCHOOL OF PURE AND APPLIED SCIENCES
DEPARTMENT OF ENGINEERING

DIPLOMA IN MEDICAL ENGINEERING
UNIT CODE:2325 TIME:2 HOURS

INSTRUCTIONS:
*Answer all the questions in section A
*Answer any two questions in section B

SECTION A
1a)I)List three categories of optical dics citing an example in each case. (6 marks)
II)With the aid of a block diagram explain the operation of a circuit using a
photoconductive cell and an amplifier stage to count objects passing along a conveyor
belt. (8 marks)

b)I)Describe with the aid of sketches the construction of a typical optical fibre cable.
(6 marks)
II)State three advantages of optical fibre cable over other electrical cables.
(3 marks)

c)Differentiate between lasers and masers. (2 marks)
d)Explain two basic parameters used to classify microprocessors. (5 marks)

SECTION B
2a)I)Discuss the following types of lasers citing an application in each case;
*Gas lasers
*Semi-conductor lasers (10 marks)

II)State any two applications of laser in each of the following;
*Medcine
*Industry (10 marks)

3a) Draw a labeled diagram of a photovoltaic cell and describe its operations
(10 marks)
b)I)Give a brief description of the properties and uses of each of the following;
*Read only memory
*Random access memory (6 marks)
II)Give a detailed description of the following registers;
*Program counter
*Accumulator (4 marks)

4a)Using a diagram describe how a half adder can be implemented using NAND gates.
(10 marks)
b)Discuss the three phases of microprocessor execution cycle; give an illustration at
each stage. (10 marks)

Medical Electronics Question Paper

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