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SYLLABUS

UNIT-I

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 with the relevant analysis, Generalized analysis of LC oscillators, Hartley and Colpitt’s oscillators with BJT and FET with relevant analysis, Crystal oscillators, Frequency and amplitude stability of oscillators.

UNIT-II

Small signal high frequency transistor amplifier models BJT: Transistor at high frequencies, Hybrid-p common emitter transistor model, Hybrid-p conductances, Hybrid-p capacitances, Validity of hybrid-p 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.

UNIT-III

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

UNIT-IV

Power amplifiers Class A large signal amplifiers, second harmonic distortions, Higher order harmonic distortion, transformer coupled audio power amplifier, efficiency, Push-pull amplifiers, Class B amplifiers, Class AB operation, Efficiency of Class B amplifier, Complementary symmetry push pull amplifier, Class D amplifier, Class S amplifier, MOSFET power amplifier, Thermal stability and heat sink.

UNIT-V

Tuned amplifiers Introduction, Q-factor, Small signal tuned amplifier - capacitance signal tuned amplifier, Double tuned amplifiers, Effect of cascading single tuned amplifiers on band width, Effect of cascading double tuned amplifiers on band width, Staggered tuned amplifiers, Stability of tuned amplifiers.