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Tuesday, October 11, 2016

EE2203 Electronic Devices and Circuits April May 2011 Question Paper

Anna University Chennai
B.E Electrical and Electronics Engineering
April/May 2011 Question paper
(Regulation 2008)
Third Semester
Time: Three hours Maximum: 100 Marks
Answer ALL Questions
PART A - (10 × 2 = 20 Marks)

Note: New Subject Code in R-2013 is EC6202

1. What is meant by diffusion current in a semi-conductor?
2. A silicon diode has a saturation current of 7.5 pA at room temperature to 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 optocouplers. (Write any four).
5. Compare with JFET BJT
6. Define the amplification factor in the JFET.
7. Define CMRR and write its significance in the differential amplifiers.
8. List the Advantages of negative feedback amplifiers
9. Sketch of 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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