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Tuesday, October 11, 2016

EE2203 Electronic Devices and Circuits April May 2010 Question Paper

Anna University Chennai
Third Semester
Electrical and Electronics Engineering
(Regulation 2008)
Time: Three hours Maximum: 100 Marks

Note: New Subject Code in R-2013 is EC6202

Answer ALL Questions
PART A — (10 × 2 = 20 Marks)
1. What is meant by diffusion current in a semi conductor?
2. A silicon diode has a saturation current of 7.5μ A at room temperature 300°K.
Calculate the saturation current at 400°K.
3. Draw the input and output characteristics of a transistor in CE configuration and mark the cutoff, saturation and active regions.
4. State the advantages of optocoupler. (Write any four).
5. Compare JFET with BJT.
6. Define amplification factor in JFET.
7. Define CMRR and write its significance in differential amplifiers.
8. List the advantages of negative feedback amplifiers.
9. Sketch the idealized characteristics for the filter types.
(a) Low pass
(b) High pass
(c) Band pass
(d) Band reject filters.
10. Define intrinsic stand off ratio of UJT and draw its equivalent circuit.


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