PAPER - I
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;
coupled circuits; balanced 3-phase circuits; Two-port networks.
Representation of continuous–time and discrete-time signals &
systems; LTI systems; convolution; impulse response; time-domain analysis of
LTI systems based on convolution and differential/difference equations. Fourier
transform, Z-transform, Transfer function. Sampling and
recovery of signals DFT, FFT Processing of analog signals through discrete-time
equations, wave propagation in bounded media. Boundary
conditions, reflection and refraction of plane waves. Transmission line:
travelling and standing waves, impedance matching,
Characteristics and equivalent circuits (large and small-signal) of
Diode, BJT, JFET 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. Linear and switching power supplies.
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 flip-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).
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 preformance
analysis; speed control.
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; DC-DC converters; Switch mode inverter; basic concepts of speed
control of dc and ac motor drives applications of variable-speed drives.
Random variables: continuous, discrete; probability, probability
functions. Statistical averages; probability models; Random signals and noise:
white noise, noise equivalent bandwidth; signal transmission with 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 FM; generation &
detection of FM and PM, Deemphasis, Preemphasis. CW modulation system: Superhetrodyne
receivers, AM receivers, communication receivers, FM receivers, phase locked
loop, SSB receiver Signal to noise ratio calculation for AM and FM receivers.
PAPER - II
of control systems; block-diagram representation; open-loop & closed-loop
systems; principles and applications of feed-back. Control system components.
LTI systems: time-domain and transform-domain analysis. Stability: Routh Hurwitz criterion, root-loci, Bode-plots and polar
plots, Nyquist’s criterion; Design of lead-lad
compensators. Proportional, PI, PID controllers. State-variable representation and analysis of control systems.
PC organisation; CPU, instruction
set, register set, timing diagram, programming, interrupts, memory interfacing,
I/O interfacing, programmable peripheral devices.
Error analysis; measurement of current, voltage, power,
energy, power-factor, resistance, inductance, capacitance and frequency; bridge
measurement. Signal conditioning circuit; Electronic measuring instruments: multimeter, CRO, digital voltmeter, frequency counter,
Q-meter, spectrum-analyzer, distortion-meter. Transducers: thermocouple, thermistor, LVDT, strain-gauge, piezo-electric
Systems: 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 of HVDC
Principles of overcurrent,
differential and distance protection. Concept of solid state relays. Circuit breakers. Computer aided protection: Introduction;
line bus, generator, transformer protection; numeric relays and application of
DSP to protection.
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 networks,