Graduate Aptitude Test in Engineering                                (GATE)

L.D.College of Engg. -  Information about  GATE

What is GATE?

GATE is Graduate Aptitude Test in Engineering. The examination is conducted by IIT, Kharagpur, every year on the second Sunday of February. Graduate student of any stream or discipline can apply for gate to take post graduation course in any stream/discipline.

            For this, you have to choose a paper depending on which course you want to take up for post graduation.

How to Apply?

            Application forms for all gate tests are issued in the month of October in general. And the dead line for submission is generally in the month of November. In Ahmedabad, application forms are issued at S.B.I., Bhadra Branch for Rs. 800/- for general categories and Rs. 400/- for reserved categories.

Examination Paper Format

• Section A: 75 marks for objective questions with four options. (With no negative marking).
• Section B: 75 marks for fully technical problems of 5 marks each.

Syllabus:

v     Networks: Network graphs, matrices associated with graphs, fundamental cut set and fundamental circuit matrices, solution methods, nodal and mesh analysis, network theorems, superposition theorem, Thevenin theorem, and Norton’s theorem, Maximum power transmission theorem, wye-delta transformation, steady state sinusoidal analysis using phasors, Fourier series, linear constant coefficient, differential and difference equations, time domain analysis of simple RLC circuits, Laplace and Z transforms, frequency domain analysis of RLC circuits, convolution, 2-port network parameters, driving point and transfer functions, state equations for networks.

v     Analog Circuits: characteristics and equivalent circuits (large and small signal) of diodes, BJTs, FETs and MOSFETs, simple diode circuits, clipping, clamping, rectifier, Biasing and bias stability of transistor and FET amplifiers. Amplifiers: singles and multistage, differential, operational, feedback and power. Analysis of amplifiers: frequency response of amplifiers. Simple Op-Amp circuits. Filters. Sinusoidal oscillators, criteria for oscillation. Single stage and op-amp configurations. Function generators and wave shaping circuits. Power supplies.

v     Digital circuits: Boolean algebra; minimization of Boolean functions; logic gates; digital IC families (DTL, TTL, EC, MOS, CMOS). Combinational circuits: arithmetic circuits, code converters, multiplexers and decoders. Sequential circuits: latches and flip-flops, counters and shift registers. Comparators, timers, multivibrators. Sample hold circuits, ADCs and DACs. Semiconductor memories. Microprocessor (8085): architecture, programming, memory and I/O interfacing.

v     Control systems: Basic control system components, block diagrammatic description, and reduction of block diagrams. Properties of systems: linearity, time-invariance, stability, and causality. Open loop and closed loop (feedback) systems. Special properties of linear time-invariant (LTI) systems: transfer functions, impulse response, poles, zeros, their significance, 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 system and frequency response. Tools and techniques for LTI control system analysis: root, loci, Routh-Herwitz criterion. Bode and Nyquist Plots; control system compensators; elements of lead and lag compensation, elements of Proportional-Integral-Derivative (PID) control. State variable representation and solution of state equation for LTI systems.

v     Communication systems: Fourier analysis of signals: amplitude, phase and power spectrum. Autocorrelation and cross-correlation and their Fourier transforms. Signal transmission through linear time-invariant (LTI) systems, impulse response and frequency response, group delay and phase delay. Analog modulation systems: amplitude and angle modulation and demodulation systems, spectral analysis of these operations, super heterodyne receivers, elements of hardware realizations of analog communication systems. Basic sampling theorems. Pulse code modulation (PCM), differential pulse code modulation (DPCM), delta modulation (DM), and Digital modulation schemes: amplitude, phase and frequency shift keying schemes (ASK, PSK, FSK). Multiplexing: time division and frequency division. Additive Gaussian noise: characterization using correlation probability density function (PDF), power spectral density (PSD). Signal to noise ratio (SNR) calculations for amplitude modulation (AM) and frequency modulation for low noise conditions.

v     Electromagnetics: Elements of vector calculus: gradient, divergence and curl. Gauss’ and Stokes’ theorems. Maxwell’s equation in 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. Pulse excitation, waveguides; modes in rectangular waveguides. Boundary conditions; cut-off frequencies. Dispersion relations. Antennas: dipole antenna, antenna arrays, radiation patterns, reciprocity theorem, antenna gain. 

Tips:

• Strictly stick to the syllabus.
• Read as much material as you can, on a given topic.
• Clear all your doubts regarding fundamentals of any subject.
• Practice test papers, which are available in the market and are published by G.K. Publishers and Satya Prakashan.
• Subscribing tutorials from professional coaching classes will really help a lot.
• In section B, generally certain topics are given more weightage regularly such as,
1. Transistor fundamentals and & its models
2. Network theory
3. Modulation types, noise, codec etc.
4. K-maps
5. Memory addressing chip design
6. 8085 assembly instructions

By

Sanket Shah, Dhruvish Shah and Harsh Shah                                                                     6th E.C.                                                                                                                                      L.D.E.C.                                                                                               Back to Home