ELECTRICAL ENGINEERING

PAPER-I
Electrical Circuits-Theory and Applications- Circuit components; network graphs; KCL, KVL; circuit analysis methods –nodal analysis ,mesh analysis; basic network theorems and applications ; transient analysis – RL, RC and RLC circuits; sinusoidal steady state analysis; resonant circuits and applications; coupled circuits and applications; balanced 3- phase circuits Two-port network, driving point and transfer functions; poles and zeros of network functions. Elements of network synthesis . Filter – theory- design and application . Active filters. Circuit simulation- Input formats; methods of education formulation; solution of equations; output formats; SPICE.
Signals and Systems- Representation of continuous – time and discrete-time signals & systems; LTI systems; convolution; impulse response , time domain analysis of LTI system based on convolution and differential/ difference equations. Fourier transform, Laplace transform, Z-transform, Transfer function. Sampling and recovery of signals DFT, FFT Processing of analog signals through discrete- time systems.
E.M. Theory- Maxwell’s equations, wave propagation in bounded media. Boundary conditions reflection and refraction of plane waves. Transmission line- Distributed parameter circuits , traveling and standing waves, impedance matching . Smith chart. Wave guides- parallel plane guide, TE , TM and TEM wave , rectangular and cylindrical wave guides , resonators. Planar transmission lines; stripline, microstripline.
Analog Electronics- Characteristics and equivalent circuits (large and small- signal) of Diode, BJT, JEET and MOSFET . Diode circuits- clipping , clamping, rectifier, Biasing and bias stability. FET amplifiers .Current mirror; Amplifiers – single and multi-stage, differential, operational, feedback and power , Analysis of amplifiers; frequency- response of amplifiers. OPAMP circuits. Filters; sinusoidal oscillators- criterion for oscillation; single transistor and OPAMP configurations, Function generators and wave- shaping circuits. Power supplies.
Digital Electronics- Boolean algebra; minimization of Boolean functions; logic gates; digital IC families (DTL, TTL, ECL, MOS, CMOS). Combinational circuits – arithmetic circuits , code converters, multiplexers and decoders. Sequential circuits- latches and flops, counters and shift- registers. Comparators, timers, multivibrators. Sample and hold circuits , ADCs and DACs Semiconductor memories .Logic implementation using programmable devices (ROM, PLA, FPGA).
Energy Conversion- Principles of electromechanical energy conversion- Torque and emf in rotating machines. DC machines- characteristics and performance analysis ; starting and speed control of motors.
Transformers- Principles of operation and analysis ; regulation efficiency; 3-phase transformers. 3-phase induction machines and synchronous machines- characteristics and performance analysis; speed control .Special machines- Stepper motors, Brushless dc motors, permanent magnet motors single- phase motors; FHP.
Power Electronics and Electric Drives- Semiconductor power devices- diode, transistor , thyristor, triac ,GTO and MOSFET- static characteristics and principles of operation; triggering circuits ; phase control rectifiers; bridge converters- fully – controlled and half- controlled; principles of thyristor choppers and inverters; basic concepts of speed control of dc and ac motor drives applications of variable- speed drives.
Analog Communication- Random variables- continuous, discrete; probability, probability . Statististical averages; probability models; Random signals and noise; signal to noise ratio. Linear CW modulation- Amplitude modulation – DSB, DSB- SC and SSB. Modulators and Demodulators; Phase and Frequency modulation- PM & Fm signals; narrowband modulation system- Superhetrodyne receivers, AM receivers, communication ratio calculation for AM and FM receivers.
Microwaves and Antenna- Electromagnetic radiation, Propagation of waves- ground waves , sky wave, space wave, tropospheric scatter propagation. Extraterrestrial communications. Antenna- Various types, gain, resistance , band – width , beamwidth and polarization, effect of ground. Antenna coupling; high frequency antennas; microwave antennas; special purpose antennas . Microwave Services – Klystron , magnetron , TWT, gun diodes, Impatt , Bipolar and FETs, Microwave intergrated circuits . Microwave measurements.
PAPER-II
Control Systems- Elements of control systems; block – diagram representation; open- loop & closed- loop systems; principles and applications of feed- back . LTI systems – time domain and transform- domain analysis . Stability- Routh Hurwitz criterion, root-loct, Nyquist’s criterion, Bode-plots, Design of lead-lad compensators. Proportional, PL, PID controllers. State- variable representation and analysis of control systems. Principles of discrete- control systems.
Electrical Engineering Materials- Electrical / electronic behaviour of materials – conductivity; free –electrons and band-theory; intrinsic and extrinsic semiconductor, p-n junction; solar cells , super- conductivity. Dielectric behaviour of materials; polarization phenomena; piezo- electric phenomena. Magnetic materials – behaviour and application, Photonic materials – refractive index, absorption and emission of light , optical fibres, lasers and opto- electronic materials.
Microprocessors and microcomputers- 8-bit microprocessor- architecture, CPU, module design, memory interfacing , I/O, Peripheral controllers, Multiprocessing . IBM PC architecture – overview , introduction to DOS , Advanced microprocessors.
Measurement and Instrumentation- Error analysis ; measurement of current voltage, power , energy, power-factor, resistance, inductance, capacitance and frequency; bridge measurements . Electronic measuring instruments- multimeter, CRO, digital voltmeter , frequency counter, Q-meter, spectrum- analyzer , distortion-meter. Transducers- thermocouple, thermistor , LVDT, strain- gauge, piezo- electric crystal. Use of transducers in measurements of non-electrical quantities. Data- acquisition systems.
IC Technology – Overview of IC Technology, Unit-step used in IC fabrication- water cleaning , photo- lithography, wet and dry etching , oxidation, diffusion , ion-implantation, CVD and LPCVD techniques for deposition of Poly- silicon, silicon, silicon-nitride and silicon di –oxide ; metallisation and passivation.
Power System – Analysis and Control- Steady- state performance of overhead transmission lines and cables; principles of active and reactive power transfer and distribution ; per unit quantities; bus admittance and impedance matrices ; load flow; voltage control and power factor correction; economic operation; symmetrical components, analysis of symmetrical and unsymmetrical faults. Concept of system stability – swing curves and equal area criterion. Static VAR system. Basic concepts to energy control centers; various states of a power system; SCADA systems and RTUs Active power control- Speed control of generators, tie- line control, frequency control . Economic dispatch.
Power system protection- Principles of overcurrent , differential and distance protection. Concept of solid state relays. Circuit brakers. Computer aided protection- Introduction; line bus , generator, transformer protection; numeric relays and application of DSP to protection.
Non- conventional Energy Sources and Energy Management- Introduction to the energy problem; difficulties with conventional energy sources. Wind – Energy- Basics of Wind turbine aerodynamics; wind energy conversion systems and their integration into electrical grid. Solar – Energy- Thermal conversion; photovoltaic conversion. Wave- energy. Importance of Energy Management – Energy audit; energy economics – discount rate , payback period, internal rate of return, life cycle costing.
Digital communication- Pulse code modulation (PCM) , differential pulse code modulation (DPCM), delta modulation (DM) , Digital modulation and demodulation schemes- amplitude, phase and frequency keying schemes (ASK, PSK, FSK). Error control coding – error detection and correction, linear block codes, convolution codes. Information measure and source coding . Data network , 7 – layer architecture.
Satellite Communication , Radar and TV- Satellite Communication – General overview and technical characteristics , earth station equipment , satellite link design , CNR of Satellite system, Radar- Basic principles , Pulsed systems- CW Doppler radar, FMCW radar, Phase array radars. Television systems- Television systems and standards , Black- and White- and Colour- TV transmission and receiver systems.
Fibre Optic System- Multiplexing – Time division multiplexing, Frequency Division multiplexing . Optical properties of materials- Refractive index absorption and emission of light , optical fibres, lasers and optoelectronic materials Fibre optic links.