Semester : SEMESTER 3
Subject : Analog Electronic Circuits
Year : 2019
Term : DECEMBER
Scheme : 2015 Full Time
Course Code : EE 203
Page:1
C C192024 Pages:2
Reg No.:_ Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
THIRD SEMESTER B.TECH DEGREE EXAMINATION(R&S), DECEMBER 2019
Course Code: EE203
Course Name: ANALOG ELECTRONICS CIRCUITS
Max. Marks: 100 Duration: 3 Hours
PARTA
Answer all questions, each carries5 marks. Marks
1 Design a clamper circuit to create a 60 offset of -3V to a sine wave input of (5)
amplitude 5V also draw the output waveform
2 Draw the frequency response of CE amplifier and explain why gain falls at very (5)
high frequencies & very low frequencies.
3 What is the concept of negative feedback in amplifiers? List out the advantages (5)
of negative feedback in amplifiers.
+ Show that the closed loop gain of opamp amplifier can be made independent of (5)
its open loop gain.
5 Draw the circuit diagram of a Schmitt trigger. Why it is called as a regenerative (5)
comparator?
6 Explain with neat circuit diagram, the operation of Logarithmic amplifier (5)
7 How triangular wave can be generated using opamps? (5)
8 Determine the output frequency of the 555 astable multivibrator for C=0.01uF, (5)
Ra=2kQ & Rg=200kQ.
PART B
Answer any twofull questions, each carries10 marks.
9 Design a Voltage divider circuit for a silicon transistor with ൩൦100 and S<8. (10)
The desired Q-point is Vcr=SV, 151൧. Assume Vec=10V and Rg=1kQ
10 Explain using neat sketches, the operation & characteristics of an-channel JFET. (10)
11 ஐ Illustrate with neat circuit diagram how the change in base emitter voltage is (5)
compensated in transistor amplifiers
b) Draw the Hybrid-z model of BJT and explain significance of each parameters. (5)
PART C
Answer any twofull questions, each carries10 marks.
12 Show that the maximum conversion efficiency of class A power amplifier canbe (10)
increased using transformer coupling.
13 Draw the neat circuit diagram of RC phase shift oscillator and derive its (10)
Page 1 of 2