SUBJECT - ELECTRONICS CIRCUITS-II
CODE - 09 405
SEMESTER - FOURTH
BRANCH - AI
UNIVERSITY - CALICUT
YEAR - 2011
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Part A
Answer all Questions
1.State any two applications of transistor as a switch.
2.What is a Miller circuit.
3.Classify feedback amplifiers.
4.What are harmonics?
5.What is a negative resistance device? Give an example.
(5x2=10 marks)
Part B
Answer any four questions,
6.Explain the need and use of commutating capacitors in a bistable multivibrator circuit.
7.Explain the working of a 555 timer IC.
8.(a) What are the advantages of negative feedback?
(b) What is the criteria for oscillation?
9.Explain te applications of various power amplifiers.
10.Exlain the response of a high pass RC circuit to a step input.
11.State the general features of a time base generator.
(4x5=20 marks)
Part C
Answer all questions
12.(a) Explain the working of a monostable multivibrator using transistors.
Or
(b) Explain the working of UJT sweep circuit.
13.(a) Explain the working of a Bootstrap time base generator.
Or
(b) Explain any two applications of PLL.
14.(a) Explain the working of a Hartley oscillator.
Or
(b) Explain the effect of feedback on voltage series, current series, voltage shunt and current shunt feedback.
15.(a) Explain the working of classs G amplifiers.
Or
(b) Explain the working of a class B push-pull amplifier.
(4x10=40 marks)
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