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SYLLABUS

Part-A

Unit-I

Introduction to D.C and A.C Circuits Ohm’s law, R, L, C components, Kirchhoff’s laws, Types of sources, Simple problems on resistive networks, Series parallel circuits, Star delta and delta star transformation, Sinusoidal waveforms and basic definitions, Root mean square and average values of sinusoidal currents and voltages, Form factor and peak factor. Network Theorems Thevenin’s, Norton’s, Maximum power transfer and Superposition theorems for D.C excitations. Two Port Networks Two port network parameters – Impedance, Admittance, Transmission and hybrid parameters and their relations.

UNIT-II

D.C Machines D.C Generators: Constructional details of D.C machines, Principle of operation of D.C generators, Types of D.C generators, E.M.F equation, O.C.C of a D.C shunt generator D.C Motors: Principle of operation of D.C motors, Torque equation, Losses and efficiency calculation, Speed control of D.C shunt motor (Armature voltage control and field flux control), Swinburne’s test and Application.

UNIT-III

A.C machines 1-Phase transformers: Principle of operation, Constructional Details, E.M.F equation, Losses and efficiency, OC & SC tests, Regulation of Transformers. 3-Phase Induction Motors: Principle of operation, Slip torque (Simple Problems), Slip-torque characteristics. 3-Phase Alternators: Principle of operation – Constructional details – E.M.F equation.

Part-B

Unit-I

Semiconductor Devices: Intrinsic semiconductors – Electron-Hole pair generation, Conduction in intrinsic semiconductors, Extrinsic semiconductors – N-type and P-type semiconductors, Comparison of N-type and P-type semiconductors. The p-n junction – Drift and diffusion currents, The p-n junction diode – Forward bias, Reverse bias, Volt - ampere characteristics – Diode specifications, Applications of diode, Diode as a switch, Diode as a rectifier – Half-wave rectifier, Full-wave rectifier, Full-wave bridge rectifier, Rectifiers with filters, Zener diode – Volt-ampere characteristics, Zener diode as voltage regulator.

Unit-II

BJT and FETs: Bipolar Junction Transistor (BJT) – Types of transistors, Operation of NPN and PNP transistors, Input -Output characteristics of BJT – CB, CE and CC configurations, Relation between IC, IB and IE. Transistor Biasing – Fixed bias, Voltage divider bias, Transistor applications – Transistor as an amplifier, Transistor as a switch, Junction Field Effect Transistor (JFET) – Theory and operation of JFET, Output characteristics, Transfer characteristics, Configurations of JFET – CD, CS and CG configurations, JFET applications – JFET as an amplifier, JFET as a switch, Comparison of BJT and JFET, MOSFET – The enhancement and depletion MOSFET, Static characteristics of MOSFET, Applications of MOSFET.

Unit-III

Oscillators and Op-Amps: Sinusoidal oscillators, Barkhausen criteria for oscillator operation, Components of an oscillator – Transistor amplifier circuits, Feedback circuits and oscillator circuits, Classification of oscillators, LC tuned, RC phase shift oscillator circuits. Operational Amplifiers (Op-Amps): Symbol of an op-amps, Single input and dual input op-amps (Differential amplifier), Characteristics of an ideal op-amp, Basic forms of op-amps – Inverting and non-inverting amplifiers, Applications of op-amps, Summing, Differential, Integrator, Differentiator amplifier