SUBJECT - ELECTRONICS CIRCUITS-II
CODE - 09 405
SEMESTER - FOURTH
BRANCH - AI
UNIVERSITY - CALICUT
YEAR - 2012
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Part A
Answer all Questions
1.What are commutating capacitors?
2.Define sweep speed.
3.Draw the block diagram of a current shunt feedback amplifier.
4.Give the application of class A, class B and class C power amplifiers.
5.What is Barkhausen criterion?
(5x2=10 marks)
Part B
Answer any four questions,
6.Explain the working of a MOS inverter?
7.Discuss the general features of time base signal. Draw the schematic diagrams of Miller and Bootstrap time base generators.
8.Discuss on the frequency stability of an oscillator.
9.Discuss the efficiency of class A, class B, class C and class AB amplifiers.
10.Explain the working of PLL.
11.Discuss effect of negative feedback on input impedence of a voltage shunt feedback circuit and current series feedback circuit.
(4x5=20 marks)
Part C
Answer all questions
12.(a) Explain the working of a UJT sweep circuit
Or
(b) Explain the working of Schmitt trigger circuit.
13.(a) Explain the working of 555 IG timer as a monostable multivibrator.
Or
(b)explain any two applications of PLL.
14.(a) Explain the working of Wein bridge oscillator.
Or
(b) Explain the working of a Hartley oscillator.
15.(a) Explain the working of transformer coupled class A power amplifier.
Or
(b) Explain the working of class G amplifiers.
(4x10=40 marks)
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