4EE1 POWER ELECTRONICS-II

Unit-1

Feedback Amlifiers:

Classification, Feedback concept, transfer gain with    feedback. General

characteristics of negative feedback amplifiers. Analysis of voltage series, voltage shunt,

current series and current shunt feedback amplifiers. Stability criterion.

Unit-2

Oscillators:

Classification of oscillators and Criterion for oscillation. RC-phase shift, Hartley,

Colpitts, tuned collector, Wein Bridge and crystal oscillators. Astable, monostable and bistable

multivibrators. Schmitt trigger.

Unit-3

OP-AMP and Its Applications:

Operational amplifier: inverting and non-inverting modes.

Characteristics of ideal op-amp. Offset voltage and currents. Basic op-amp applications.

Differential Amplifier and common mode rejection ratio. Differential DC amplifier and stable

ac coupled amplifier. Integrator and differentiator. Analog computation, comparators, sample

and hold circuits, logarithmic & antilog Amplifiers and Analog multipliers.

Unit-4

Integrated Circuits:

Precision AC/DC converters-precision limiting, Precision half wave and

full wave rectifiers. Active average and peak detectors, A to D and D to A converters. IC 555

timer and its application. Regulated power supplies, Series and shunt voltage regulators, Brief

idea of Monolithic regulator.

Unit-5

Power Amplifiers:

Class –A large signal amplifiers, second harmonic distortion, higher order

harmonic generation, Transformer coupled audio power amplifier, collector efficiency.