UNIVERSITY OF MADRAS
B.Sc. DEGREE COURSE IN ELECTRONICS SCIENCE
SEMESTER SYSTEM WITH CREDITS
(Effective from the Academic Year 2003-2004)

Semester III - Paper V - Amplifiers and Oscillators

Duration: 3 hrs
Maximum Marks: 100
Credits: 4

Unit-1

Amplifiers I : General principles of small signal amplifiers - classifications - RC coupled amplifiers - Gain - Frequency response - Input and output impedance - Multistage amplifiers - Transformer coupled amplifiers - Equivalent circuit at low, medium and high frequencies - emitter follower.
Class A and Class B Power Amplifiers - Single ended and pushpull configurations - Power dissipation and output power calculations.

Unit-2

Feedback Amplifiers : Basic concept of feedback amplifiers - Transfer gain with feekfack - General characteristics of negative feedback amplifier effect of negative feedback on gain - gain stability- distortion and Bandwidth - Input and output resistance in the case of various types of feedback - Analysis of voltage and current feedback amplifier circuits.

Unit-3

Oscillators : Feedback requirement of oscillations - Barkausen Criterion for oscillation - Hartley , Colpitts, Phase shift and Wien bridge oscillators - Condition for oscillations and frequency derivation - Crystal oscillator - UJT Relaxation oscillator. Monostable, Bi-stable and Astable multivibrators -Schmitt trigger.

Unit-4

Operational Amplifiers : Principles, Transfer characteristics, various offset parameters, differential gain, CMRR, slew rate, band with - basic operational amplifiers circuits under inverting, non-inverting modes.

Unit-5

Op-Amp Circuits : Adder, subtractor, integrator, differentiator - Log , Anti log amplifiers, comparators - sine, square, triangular waveform generators, active filters - sample and hold circuits - analog computers for solving simultaneous and second - order differential equations.

Books for Study and reference

1.Micro Electronics by J.Milman & Halkias , McGraw Hill International Book Company New Delhi 1990 Edition.
2. Electronic Circuits by L.Schilling and Belove ,3^rd Edition, McGraw Hill, Newyork.
3. Electronic Devices, Circuits and Applications by W.D.Stanley, Prentice Hall.
4. Electronic Devices and Circuit Theory by Robert Boylestad and Nashel sky.
5. Electronic Devices and Circuits by J.P. Agrawal and Amit Agrawal, Prakasam Publishers.
6. Handbook of Electronics by Gupta and Kumar, Pragati Prakashan Publishers
7. Basic Electronics, 6^th Edition by B. Grob, McGraw- Hill, NY, 1989.