Following is the syllabus for Gate Exam for Electronics and Communication Engineering
ENGINEERING MATHEMATICS
Linear Algebra: Matrix Algebra, Systems of linear equations, Eigen values and eigen vectors.
Calculus: Mean value theorems, Theorems of integral calculus, Evaluation of definite and improper integrals, Partial
Derivatives, Maxima and minima, Multiple integrals, Fourier series. Vector identities, Directional derivatives, Line, Surface
and Volume integrals, Stokes, Gauss and Green’s theorems.
Differential equations: First order equation (linear and nonlinear), Higher order linear differential equations with constant
coefficients, Method of variation of parameters, Cauchy’s and Euler’s equations, Initial and boundary value problems, Partial
Differential Equations and variable separable method.
Complex variables: Analytic functions, Cauchy’s integral theorem and integral formula, Taylor’s and Laurent’ series, Residue
theorem, solution integrals.
Probability and Statistics: Sampling theorems, Conditional probability, Mean, median, mode and standard deviation, Random
variables, Discrete and continuous distributions, Poisson, Normal and Binomial distribution, Correlation and regression
analysis.
Numerical Methods: Solutions of nonlinear algebraic equations, single and multistep methods for differential equations.
Transform Theory: Fourier transform, Laplace transform, Ztransform.
ELECTRONICS AND COMMUNICATION ENGINEERING
Networks: Network graphs: matrices associated with graphs; incidence, fundamental cut set and fundamental circuit matrices.
Solution methods: nodal and mesh analysis. Network theorems: superposition, Thevenin and Norton’s maximum power transfer,
WyeDelta transformation. Steady state sinusoidal analysis using phasors. Linear constant coefficient differential equations;
time domain analysis of simple RLC circuits, Solution of network equations using Laplace transform: frequency domain analysis
of RLC circuits. 2port network parameters: driving point and transfer functions. State equations for networks.
Electronic Devices: Energy bands in silicon, intrinsic and extrinsic silicon. Carrier transport in silicon: diffusion
current, drift current, mobility, and resistivity. Generation and recombination of carriers. pn junction diode, Zener diode,
tunnel diode, BJT, JFET, MOS capacitor, MOSFET, LED, pIn and avalanche photo diode, Basics of LASERs. Device technology:
integrated circuits fabrication process, oxidation, diffusion, ion implantation, photolithography, ntub, ptub and twintub
CMOS process.
Analog Circuits: Small Signal Equivalent circuits of diodes, BJTs, MOSFETs and analog CMOS. Simple diode circuits, clipping,
clamping, rectifier. Biasing and bias stability of transistor and FET amplifiers. Amplifiers: singleand multistage,
differential and operational, feedback, and power. Frequency response of amplifiers. Simple opamp circuits. Filters.
Sinusoidal oscillators; criterion for oscillation; singletransistor and opamp configurations. Function generators and
waveshaping circuits, 555 Timers. Power supplies.
Digital circuits: Boolean algebra, minimization of Boolean functions; logic gates; digital IC families (DTL, TTL, ECL, MOS,
CMOS). Combinatorial circuits: arithmetic circuits, code converters, multiplexers, decoders, PROMs and PLAs. Sequential
circuits: latches and flipflops, counters and shiftregisters. Sample and hold circuits, ADCs, DACs. Semiconductor memories.
Microprocessor(8085): architecture, programming, memory and I/O interfacing.
Signals and Systems: Definitions and properties of Laplace transform, continuoustime and discretetime Fourier series,
continuoustime and discretetime Fourier Transform, DFT and FFT, ztransform. Sampling theorem. Linear TimeInvariant (LTI)
Systems: definitions and properties; causality, stability, impulse response, convolution, poles and zeros, parallel and
cascade structure, frequency response, group delay, phase delay. Signal transmission through LTI systems.
Control Systems: Basic control system components; block diagrammatic description, reduction of block diagrams. Open loop and
closed loop (feedback) systems and stability analysis of these systems. Signal flow graphs and their use in determining
transfer functions of systems; transient and steady state analysis of LTI control systems and frequency response. Tools and
techniques for LTI control system analysis: root loci, RouthHurwitz criterion, Bode and Nyquist plots. Control system
compensators: elements of lead and lag compensation, elements of ProportionalIntegralDerivative (PID) control. State
variable representation and solution of state equation of LTI control systems.
Communications: Random signals and noise: probability, random variables, probability density function, autocorrelation, power
spectral density. Analog communication systems: amplitude and angle modulation and demodulation systems, spectral analysis of
these operations, superheterodyne receivers; elements of hardware, realizations of analog communication systems;
signaltonoise ratio (SNR) calculations for amplitude modulation (AM) and frequency modulation (FM) for low noise
conditions. Fundamentals of information theory and channel capacity theorem. Digital communication systems: pulse code
modulation (PCM), differential pulse code modulation (DPCM), digital modulation schemes: amplitude, phase and frequency shift
keying schemes (ASK, PSK, FSK), matched filter receivers, bandwidth consideration and probability of error calculations for
these schemes. Basics of TDMA, FDMA and CDMA and GSM.
Electromagnetics: Elements of vector calculus: divergence and curl; Gauss’ and Stokes’ theorems, Maxwell’s equations:
differential and integral forms. Wave equation, Poynting vector. Plane waves: propagation through various media; reflection
and refraction; phase and group velocity; skin depth. Transmission lines: characteristic impedance; impedance transformation;
Smith chart; impedance matching; S parameters, pulse excitation. Waveguides: modes in rectangular waveguides; boundary
conditions; cutoff frequencies; dispersion relations. Basics of propagation in dielectric waveguide and optical fibers.
Basics of Antennas: Dipole antennas; radiation pattern; antenna gain.
For more information refer: http://gate.iitk.ac.in/
