To be eligible for admission to the Ph.D. programme, a candidate must have obtained a Master’s/M.Phil. degree of any other recognized University, or a Post-graduate Degree in an allied subject equivalent thereof. One must have obtained either a minimum of 50% marks or equivalent grade in the M.Phil. degree or a minimum of 55% marks or equivalent grade in the Master’s degree.

Ph D Entrance Exam Syllabus

The syllabus for Ph. D Entrance Test for E C E Department under Visvesvaraya Ph D Scheme (December 2015) of NIT or National Institute of Technology Srinagar for admission in the course is as follows:

Electric Circuits & 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’s and Norton's
maximum power transfer, 3 phase and Wye-Delta transformation. Transient and
Steady state analysis of ac and dc circuits. Time domain analysis of simple RLC
circuits, Solution of network equations using Laplace transform: frequency domain
analysis of RLC circuits. 2-port network parameters: driving point and transfer
functions. State equations for networks. Filters.

Signals and Systems: Definitions and properties of Laplace transform, continuoustime
and discrete time Fourier series, continuous-time and discrete-time Fourier
Transform, DFT and FFT, z-transform. Sampling theorem. Linear Time-Invariant
(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.

Electronic Devices & Circuits: Energy bands in silicon, intrinsic and extrinsic
silicon. Carrier transport in silicon: diffusion current, drift current, mobility, and
resistivity. Generation and recombination of carriers, p-n junction diode, Zener diode,
tunnel diode, BJT, JFET, MOS capacitor, MOSFET, LED, p-I-n and avalanche photo
diode, Basics of LASER. Device technology: integrated circuits fabrication process,
oxidation, diffusion, ion implantation, photolithography, n-tub, p-tub and twin-tub
CMOS process. Small Signal Equivalent circuits of diodes, BJTs and MOSFETs.
Simple diode circuits, clipping, clamping, rectifier. Biasing and bias stability of
transistor and FET amplifiers. Amplifiers: single-and multi-stage, differential and
operational, feedback, and power. Frequency response of amplifiers. Simple op-amp
circuits. Sinusoidal oscillators; criterion for oscillation.

Digital circuits: Boolean algebra, minimization of Boolean functions; logic gates;
Combinatorial circuits: arithmetic circuits, code converters, multiplexers, decoders,
PROMs and PLAs & FPGA. Sequential circuits: latches and flip-flops, counters and
shift-registers. VHDL Implementations. Sample and hold circuits, ADCs, DACs.
Microprocessor (8085): architecture, programming, memory and I/O interfacing.

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, super-heterodyne receivers; elements of
hardware, realizations of analog communication systems; signal-to-noise 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
2 of 2
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. Wave propagation through various media

Wireless Communication
Cellular concepts, frequency reuse, co channel interference, Cell splitting. Radio
propagation characteristics; models for path loss, shadowing and multipath fading.
Diversity techniques and Rake demodulator. Introduction to spread spectrum

Computer Networks
Review of data communication techniques. Data transmission, line coding, error
control coding. Switching . LAN topologies and protocols. MAC protocols, Routing
and congestion control. Quality of Service.

Computer Organization and Architecture:
Computer cycle control, CPU organization, Memory Organization, I/O organization,
Pipelining, VHDL Implementations