Railtel Corporation Dy. Manager Electrical Syllabus
| Circuit Theory | Circuit Components; circuit analysis; basic network theorems and applications; resonant circuits |
| Signals & Systems | Continuous-time and discrete-time signals & systems; Sampling and recovery of signals |
| Analog Electronics | 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;
Amplifiers : single and multi-stage, differential, operational, feedback and power. OPAMP circuits. Filters; sinusoidal oscillators; Function generators and wave-shaping circuits. |
| Digital Electronics | 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. Simple and hold circuits, ADCs and DACs. Semiconductor memories. Logic implementation using programmable devices (ROM, PLA, FPGA) |
| Energy Conversion | Principles of electronmechanical 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. |
| 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; DCDC converts; Switch mode inverter; basic concepts of speed control of dc and ac Motor drives applications of variable speed drives. |
| Analog Communication | Random variables; Random signals and noise; Amplitude modulation; Modulators and Demodulators; Phase and Frequency modulation, Superhetrodyne receivers, AM receivers, communication receivers, FM receivers, Signal to noise ratio calculation for AM and FM receivers. |
| Control System | Elements of control systems; block-diagram representation; open-loop & closed hoop systems; Control system components, Proportional, PI, PID controllers. |
| Measurement and Instrumentation | Measurement of current, voltage, power, energy, power-factor, resistance, inductance, capacitance and frequency; bridge measurement. Signal conditioning circuit; Electronic measuring instrument : multimeter, CRO, digial voltmeter, frequency counter, Q-meter, spectrum-analyzer, distortion-meter.
Transducers : thermocouple, thermistor, LVDT, strain-guage, piezo-electric crystal. |
| Power Systems | Principles of active and reactive power transfer and distribution; load flow; voltage control and power factor correction; economic operation; symmetrical and unsymmetrical faults. Concept of system stability, Static VAR system. HVDC transmission. |
| Power System Protection | Principles of over current, differential and distance protection. Solid state relays, Circuit breakers, line bus, generator, transformer protection; numeric relays. |
| 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 detection and correction, data networks. |
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