Electronics and communication engineering

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Any five experiments are to be conducted from each part

  1. Series and Parallel Resonance – Timing, Resonant frequency, Bandwidth and Q-factor determination for RLC network.

  2. Time response of first order RC/RL network for periodic non-sinusoidal inputs – time constant and steady state error determination.

  3. Two port network parameters – Z-Y Parameters, chain matrix and analytical verification.

  4. Verification of Superposition and Reciprocity theorems.

  5. Verification of maximum power transfer theorem. Verification on DC, verification on AC with Resistive and Reactive loads.

  6. Experimental determination of Thevenin’s and Norton’s equivalent circuits and verification by direct test.


  1. Magnetization characteristics of D.C. Shunt generator. Determination of critical field resistance.

  2. Speed control of D.C. Shunt motor by Armature & flux control methods

  3. Brake test on DC shunt motor. Determination of performance characteristics.

  4. OC & SC tests on Single-phase transformer (Predetermination of efficiency and regulation at given power factors and determination of equivalent circuit).

  5. Brake test on 3-phase Induction motor (performance characteristics).

  6. Regulation of alternator by synchronous impedance method

Learning Outcomes:

    • Able to analyse RLC circuits and understand resonant frequency and Q-factor.

    • Able to determine first order RC/RL networks of periodic non- sinusoidal waveforms.

    • Able to apply network theorems to analyze the electrical network.

    • Able to describe the performance of dc shunt machine.

    • Able to investigate the performance of 1-phase transformer.

    • Able to perform tests on 3-phase induction motor and alternator to determine their performance characteristic

II Year - II Semester



4 0 0 3

The main objectives of this course are:

  • Small signal high frequency BJT transistor amplifier Hybrid-π equivalent circuit and the expressions for conductances and capacitances are derived.

  • Cascading of single stage amplifiers is discussed. Expressions for overall voltage gain are derived.

  • The concept of feedback is introduced. Effect of negative feedback on amplifier characteristics is explained and necessary equations are derived.

  • Basic principle of oscillator circuits is explained and different oscillator circuits are given with their analysis.

  • Power amplifiers Class A, Class B, Class C, Class AB and other types of amplifiers are analyzed.

  • Different types of tuned amplifier circuits are analyzed.


At the end of this course the student can able to:

  • Design and analysis of small signal high frequency transistor amplifier using BJT and FET.

  • Design and analysis of multi stage amplifiers using BJT and FET and Differential amplifier using BJT

  • Derive the expressions for frequency of oscillation and condition for oscillation of RC and LC oscillators and their amplitude and frequency stability concept.

  • Know the classification of the power and tuned amplifiers and their analysis with performance comparison.


UNIT-I Small Signal High Frequency Transistor Amplifier models:

BJT: Transistor at high frequencies, Hybrid- π common emitter transistor model, Hybrid π conductances, Hybrid π capacitances, validity of hybrid π model, determination of high-frequency parameters in terms of low-frequency parameters , CE short circuit current gain, current gain with resistive load, cut-off frequencies, frequency response and gain bandwidth product.

FET: Analysis of common Source and common drain Amplifier circuits at high frequencies.


Multistage Amplifiers : Classification of amplifiers, methods of coupling, cascaded transistor amplifier and its analysis, analysis of two stage RC coupled amplifier, high input resistance transistor amplifier circuits and their analysis-Darlington pair amplifier, Cascode amplifier, Boot-strap emitter follower, Analysis of multi stage amplifiers using FET, Differential amplifier using BJT.


Feedback Amplifiers : Feedback principle and concept, types of feedback, classification of amplifiers, feedback topologies, Characteristics of negative feedback amplifiers, Generalized analysis of feedback amplifiers, Performance comparison of feedback amplifiers, Method of analysis of feedback amplifiers.


Oscillators: Oscillator principle, condition for oscillations, types of oscillators, RC-phase shift and Wein bridge oscillators with BJT and FET and their analysis, Generalized analysis of LC Oscillators, Hartley and Colpitt’s oscillators with BJT and FET and their analysis, Frequency and amplitude stability of oscillators.

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