## GATE Electronics and Communications online tests

Electronics and Communications is not core branch of Engineering.But over the years it has become one of the most widespread and useful engineering discipline.Most candidates opt for Electronics and Communications.Most of the Engineering colleges also offer this stream.Due to these reasons the GATE Electronics and Communications paper becomes very difficult.

To help candidates preparing for GATE Electronics and Communications paper we have come up free online test series.The test series gives you preview of GATE exams.You can treat them as preliminary GATE exams.Below are links to online test series

## GATE Electronics and Communications recommended books

As mentioned above Electronics and Communications has become very important branch of engineering.More students are taking up these courses over the years.This caused increase in number of books.Almost all major publications have book on GATE Electronics and Communications paper.Out of these books I would recommend below one.The reason is it is one of the highest rated book among the students.

There are couple of books which belong to same league as this one but it is they are bit less popular.I have not included more than one book.Though I was tempted to.

## GATE Electronics and Communications syllabus

GATE Electronics and Communications Engineering paper has most of the topics covered in Engineering.Though some non core topics are left behind.Below is updated syllabus.The syllabus is taken from the official website of GATE exams.(link).

### Section 1: Engineering Mathematics

Linear Algebra: Vector space, basis, linear dependence and independence, matrix algebra, eigen values and eigen vectors, rank, solution of linear equations – existence and uniqueness.

Calculus: Mean value theorems, theorems of integral calculus, evaluation of definite and improper integrals, partial derivatives, maxima and minima, multiple integrals, line, surface and volume integrals, Taylor series.

Differential Equations: First order equations (linear and nonlinear), higher order linear differential equations, Cauchy’s and Euler’s equations, methods of solution using variation of parameters, complementary function and particular integral, partial differential equations, variable separable method, initial and boundary value problems.

Vector Analysis: Vectors in plane and space, vector operations, gradient, divergence and curl, Gauss’s, Green’s and Stoke’s theorems.

Complex Analysis: Analytic functions, Cauchy’s integral theorem, Cauchy’s integral formula; Taylor’s and Laurent’s series, residue theorem.

Numerical Methods: Solution of nonlinear equations, single and multi-step methods for differential equations, convergence criteria.

Probability and Statistics: Mean, median, mode and standard deviation; combinatorial probability, probability distribution functions – binomial, Poisson, exponential and normal;Joint and conditional probability; Correlation and regression analysis.

### Section 2: Networks, Signals and Systems

Network solution methods: nodal and mesh analysis; Network theorems: superposition,Thevenin and Norton’s, maximum power transfer; Wye‐Delta transformation; Steady state sinusoidal analysis using phasors; Time domain analysis of simple linear circuits; Solution of network equations using Laplace transform; Frequency domain analysis of RLC circuits;

Linear 2‐port network parameters: driving point and transfer functions; State equations for networks.Continuous-time signals: Fourier series and Fourier transform representations, sampling theorem and applications; Discrete-time signals: discrete-time Fourier transform (DTFT), DFT, FFT, Z-transform, interpolation of discrete-time signals;

LTI systems: definition and properties, causality, stability, impulse response, convolution, poles and zeros, parallel and cascade structure, frequency response, group delay, phase delay, digital filter design techniques.

### Section 3: Electronic Devices

Energy bands in intrinsic and extrinsic silicon; Carrier transport: diffusion current, drift current, mobility and resistivity; Generation and recombination of carriers; Poisson and continuity equations; P-N junction, Zener diode, BJT, MOS capacitor, MOSFET, LED, photo diode and solar cell; Integrated circuit fabrication process: oxidation, diffusion, ion implantation, photolithography and twin-tub CMOS process.

### Section 4: Analog Circuits

Small signal equivalent circuits of diodes, BJTs and MOSFETs; Simple diode circuits:clipping, clamping and rectifiers; Single-stage BJT and MOSFET amplifiers: biasing, bias stability, mid-frequency small signal analysis and frequency response; BJT and MOSFET amplifiers: multi-stage, differential, feedback, power and operational;

Simple op-amp circuits; Active filters; Sinusoidal oscillators: criterion for oscillation, single-transistor and opamp configurations; Function generators, wave-shaping circuits and 555 timers; Voltage reference circuits; Power supplies: ripple removal and regulation.

### Section 5: Digital Circuits

Number systems; Combinatorial circuits: Boolean algebra, minimization of functions using Boolean identities and Karnaugh map, logic gates and their static CMOS implementations, arithmetic circuits, code converters, multiplexers, decoders and PLAs;

Sequential circuits: latches and flip‐flops, counters, shift‐registers and finite state machines;Data converters: sample and hold circuits, ADCs and DACs; Semiconductor memories: ROM, SRAM, DRAM; 8-bit microprocessor (8085): architecture, programming, memory and I/O interfacing.

### Section 6: Control Systems

Basic control system components; Feedback principle; Transfer function; Block diagram representation; Signal flow graph; Transient and steady-state analysis of LTI systems; Frequency response; Routh-Hurwitz and Nyquist stability criteria; Bode and root-locus plots; Lag, lead and lag-lead compensation; State variable model and solution of state

equation of LTI systems.

### Section 7: Communications

Random processes: autocorrelation and power spectral density, properties of white noise,filtering of random signals through LTI systems; Analog communications: amplitude modulation and demodulation, angle modulation and demodulation, spectra of AM and FM, superheterodyne receivers, circuits for analog communications; Information theory:

entropy, mutual information and channel capacity theorem; Digital communications:PCM, DPCM, digital modulation schemes, amplitude, phase and frequency shift keying (ASK, PSK, FSK), QAM, MAP and ML decoding, matched filter receiver, calculation of bandwidth, SNR and BER for digital modulation; Fundamentals of error correction,Hamming codes; Timing and frequency synchronization, inter-symbol interference and its mitigation; Basics of TDMA, FDMA and CDMA.

### Section 8: Electromagnetics

Electrostatics; Maxwell’s equations: differential and integral forms and their interpretation,boundary conditions, wave equation, Poynting vector; Plane waves and properties:reflection and refraction, polarization, phase and group velocity, propagation through various media, skin depth;

Transmission lines: equations, characteristic impedance,

impedance matching, impedance transformation, S-parameters, Smith chart;Waveguides: modes, boundary conditions, cut-off frequencies, dispersion relations;Antennas: antenna types, radiation pattern, gain and directivity, return loss, antenna arrays; Basics of radar; Light propagation in optical fibers.

**Conclusion**

GATE Electronics and Communications paper required proper planning and resources to succeed in the exams.I have given most of the things required to succeed in exams.In case you have any questions then let me know.Consider sharing this post in case you found this useful.