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Reg. No. Name:

B3C042 Pages: 2

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
THIRD SEMESTER B.TECH DEGREE EXAMINATION, JULY 2017

Course Code: EE203
Course Name: ANALOG ELECTRONIC CIRCUITS (EE)

Max. Marks: 100 Duration: 3 Hours

PARTA
Answer all Questions, each having 5 marks.
Sketch a combinational clipper circuit. Explain its working.
Explain the drain characteristics of JFET and mark the pinch-off voltage.
Differentiate between positive and negative feedback. Explain how does the negative
feedback modify the gain of an amplifier.

Explain the Barkhausen Criteria of oscillations.

5. What is a zero crossing detector?

10.

11.

An inverting amplifier using the 741 IC must have a flat response up to 40KHZ. The

gain of the amplifier is 10. What maximum peak to peak input signal can be applied

without distorting the output?

Explain the operation of a triangular wave generator.

Design a phase shift oscillator so that ७०200 Hz.

PART B
Answer any two questions, each having 10 marks.

a. What factors are to be considered for selecting the operating point Q for an amplifier?
(5)

b. Draw a voltage divider bias circuit and derive the equations of voltage and current at

input and output terminals. (5)

a. Derive the equation for voltage gain and current gain for a BJT using approximate h-

parameter model for Common Emitter configuration. (6)

0. A CE amplifier has the h-parameters given by hie = 100040 hye = 2x 1 04 hye = 0

Noe = 2540 If both the load and source resistances are 1k 0, determine the (a) current

gain and (b) voltage gain. (4)

How does the constructional feature of a MOSFET differ from that ofa JFET? (10)

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