Wiley Acing the GATE Examination For Electronics and Communication Engineering

1304 Pages·2019·114.15 MB·English

by  Anil Kumar Maini

ACING THE GATE
WILEY
ELECTRONICS AND COMMUNICATION ENGINEERING

ACING THE GATE
WILEY
ELECTRONICS AND
COMMUNICATION ENGINEERING
Dr Anil Kumar Maini
Senior Scientist and former Director of Laser Science and Technology Centre
Defence Research and Development Organization, New Delhi
Varsha Agrawal
Scientist, Laser Science and Technology Centre
Defence Research and Development Organization, New Delhi
Nakul Maini
ACING THE GATE
WILEY
ELECTRONICS AND COMMUNICATION ENGINEERING
Copyright © 2015 by Wiley India Pvt. Ltd., 4435-36/7, Ansari Road, Daryaganj, New Delhi-110002.
All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in
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Wiley and the author make no representation or warranties with respect to the accuracy or completeness of
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paragraph. No warranty may be created or extended by sales representatives or written sales materials.
Disclaimer: The contents of this book have been checked for accuracy. Since deviations cannot be
precluded entirely, Wiley or its author cannot guarantee full agreement. As the book is intended for
educational purpose, Wiley or its author shall not be responsible for any errors, omissions or damages
arising out of the use of the information contained in the book. This publication is designed to provide
accurate and authoritative information with regard to the subject matter covered. It is sold on the
understanding that the Publisher is not engaged in rendering professional services.
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John Wiley & Sons Canada Ltd, 22 Worcester Road, Etobicoke, Ontario, Canada, M9W 1L1
First Edition: 2015
ISBN: 978-81-265-4543-8
ISBN: 978-81-265-8203-7 (ebk)
www.wileyindia.com
Printed at:
DedicatedwithlovetomywifeRenuka,daughterNupur,
son-in-lawKaranandmysonandco-authorNakul.
Dr Anil K. Maini
Dedicatedtomylovingmom, Mrs Kussum Agrawal
“Iholdyouclosewithinmyheartandthereyouwillremain
Towalkwithmethroughoutmylife,untilwemeetagain”
Imissyousomuch.
Varsha Agrawal
Inthememoryofmygrandparentsfortheircountlessblessings
Shri Sukhdev Raj Maini
Shrimati Vimla Maini
Shri Ramji Bazaz
Shrimati Sarla Bazaz
AlsodedicatedtomymotherShrimati Renuka Maini
andmysister Nupur Maini fortheirloveandsupport.
Nakul Maini
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PREFACE
Wiley’s Acing the GATE Examination in Electronics and Communication is intended to be the complete
book for those aspiring to compete in the GraduateAptitudeTestinEngineering (GATE) in Electronicsand
Communication discipline, comprehensively covering all topics as prescribed in the syllabus in terms of study material,
quick reference support material and an elaborate question bank. There are host of salient features offered by the book
as compared to the content of the other books already published for the same purpose. Some of the important ones
include the following.
One of the notable features of the book includes presentation of study material in simple and lucid language and
in small sections while retaining focus on alignment of the material in accordance with the require-
ments of GATE examination. While it is important for a book that has to cover the whole gamut of subjects in
electronics and communication engineering to be precise in the treatment of different topics; the present book achieves
that goal without compromising completeness. The study material and also the question bank have all the three
important `C’ qualities for effective communication across to the examinees including Conciseness, Completeness and
Correctness.
Another notable feature of the book is inclusion of summary of important mathematical expressions and
formulas towards the end of each topic. It is pertinent to mention that based on analysis of GATE examination
questions in the last ten years reveals that more than 30 per cent of GATE questions were based on important
mathematical formulations and their interpretation. While the study material would help examinees understand the
concepts; the summary of mathematical formulations would provide to them a ready reference close to the examination
day to ace the examination.
The third important feature of the book is its comprehensive question bank. The question bank is organized in
three different categories namely the SolvedProblems, PracticeExercise and GATEPreviousYears’Questions. Solved
problems contain a large number of multiple choice questions and numerical answer questions of varying complexity.
Each question in this category is followed by its solution. Under the PracticeExercise, again there are multiple choice
and numerical answer questions with marks allocated for each question. The answers to these questions are given at the
end of the section. Each of the answers is supported by an explanation or a solution hint unlike other books where solu-
tions to only selected questions are given. The third category contains questions from previous years’ GATE examinations
from 2003 onwards. Each question is followed by a complete solution and is marked for year of examination and marks.
Briefly outlining the length and breadth of the material presented in the book, it is divided into eight broad sections
in line with the prescribed syllabus. Each of the sections comprises more than one chapter. In all, there are fifty two
chapters spread out in eight different sections. The book begins with the section on Networks (Section-I). The section
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viii     PREFACE 
is divided into seven chapters covering network graphs, solution methods, network theorems, steady state sinusoidal
analysis, linear constant coefficient differential equation analysis of networks, two-port networks and state equation
analysis of networks. It is followed by second section on Electronic Devices (Section-II) covering semiconductor
physics, semiconductor diodes, three-terminal devices including bipolar transistors, field effect transistors and so on,
lasers and device technology in five different chapters. Analog Circuits (Section-III), covered in ten different
chapters, comprehensively covers analysis and applications of important electronic devices. The study material in this
section is spread out in ten chapters including small signal equivalent circuits of electronic devices, semiconductor diode
circuits, biasing and bias stability, amplifiers and their frequency response, operational amplifiers, filters, oscillators,
wave shaping circuits and power supplies. Digital Electronics (Section-IV) is the next section. It covers all impor-
tant topics of digital electronics including Boolean algebra, logic gates and logic families, combinational logic, sequen-
tial logic, D/A and A/D converters and memory devices and microprocessors. Topics covered in the section on Signals
and Systems (Section-V) that follows the section on digital electronics include Laplace transform, Fourier series,
Fourier transform, z-transform and linear time invariant (LTI) systems. Section-VI deals with Control Systems.
Different topics covered in this section include control system basics, block diagram and signal flow graphs, error con-
stants and sensitivity parameters, stability and stability analysis, control system compensators, root locus analysis,
frequency response analysis and state variable analysis of control systems. Communication Systems (Section-VII)
covers random signals and noise, analog communication systems, digital communication systems, information theory
and multiple access techniques. The final section on Electromagnetics (Section-VIII) covers elements of vector
calculus, Maxwell’s equations, plane waves, transmission lines, waveguides and antennas.
GATE is an All-India level competitive examination for engineering graduates aspiring to pursue Masters or Ph.D.
programs in India. The examination evaluates the examinees in General Aptitude, Engineering Mathematics and the
subject discipline. It is a competitive examination where close to ten lakh students appear every year. The level of
competition is therefore very fierce. While admission to a top institute for the Masters programme continues to be the
most important reason for working hard to secure a good score in the GATE examination; another great reason to
appear and handsomely qualify GATE examination is that many Public Sector Undertakings (PSUs) are and probably
in future almost all will be recruiting through GATE score. And it is quite likely that even big private sector companies
may start considering GATE seriously for their recruitment, as GATE score can give a bigger clue about who they
are recruiting. The examination today is highly competitive and the GATE score plays an important role. This only
reiterates the need to have a book that prepares examinees not only to qualify the GATE examination by getting a
score just above the threshold but also enabling them to achieve a competitive score.
The present book is written with the objective of fulfilling this requirement. The effort is intended to offer to the
large cross-section of GATE aspirants a self-study and do-it-yourself book providing comprehensive and step-by-step
treatment of each and every aspect of the examination in terms of concise but complete study material and an exhaus-
tive set of questions with solutions. The authors would eagerly look forward to the feedback from the readers through
publishers to help them make it better in subsequent editions.
Dr ANIL KUMAR MAINI
VARSHA AGRAWAL
NAKUL MAINI
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ABOUT THE AUTHORS
Dr Anil Kumar Maini is a senior scientist and former Director of Laser Science and Technology Centre, a premier
laser and optoelectronics research and development laboratory of Defence Research and Development Organisation
of Ministry of Defence. He has worked on a wide range of electronics, optoelectronics and laser systems and his areas
of expertise include optoelectronic sensor systems, laser systems, power electronics, digital electronics and related
technologies.
He has twelve books to his credit, which include, Lasers and Opto-electronics, Digital Electronics: Principles and
Applications, Satellite Technology: Principles and Applications, Microwaves and Radar, Handbook of Electronics,
Electronics and Communication Simplified, Electronics for Competitions, Electronic Devices and Circuits, Electronics
Projects for Beginners and Technical Interviews: Excel with Ease, to name a few. He has also authored about 150 tech-
nical articles and papers in national and international journals and conferences and has eight patents including a U.S.
patent (Granted: 2, Pending 6) to his credit. He is Life Fellow of Institution of Electronics and Telecommunication
Engineers (IETE) and Life Member of Indian Laser Association.
Varsha Agrawal is a scientist at the Laser Science and Technology Centre. She is with the Defence Research and
Development Organization (DRDO) under the Government of India since the past fifteen years and has been working
on the design and development of a variety of electronics sub-systems for a range of defence-related applications.
She has authored three books, which include, Satellite Technology: Principles and Applications, Satellite
Communications and Electronic Devices and Circuits. She has to her credit more than twenty five research papers and
technical articles.
Nakul Maini is currently pursuing Masters at University of Bristol, U.K. He has to his credit more than ten research
papers and technical articles.
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