RTU 3rd sem Electronics And Communication Engineering B.Tech. Syllabus Electronics Devices & Circuits

3EC1A Electronic Devices & Circuits

Unit I

SEMICONDUCTOR PHYSICS - Mobility and conductivity, Charge densities in a
semiconductor, Fermi Dirac distribution, Fermi-Dirac statistics and Boltzmann
approximation to the Fermi-Dirac statistics, Carrier concentrations and Fermi levels
in semiconductor, Generation and recombination of charges, Diffusion and
continuity equation, Transport equations, Mass action Law, Hall effect.

Unit II

JUNCTION DIODES - Formation of homogenous and hetrojuntion diodes and
their energy band diagrams, Calculation of contact potential and depletion width, VI
characteristics, Small signal models of diode, Diode as a circuit element, Diode
parameters and load line concept, C-V characteristics and dopant profile.
Applications of diodes in rectifier, Clipping, Clamping circuits and voltage
multipliers, Transient behavior of PN diode, Breakdown diodes, Schottky diodes,
and Zener diode as voltage regulator, Construction, Characteristics and operating
principle of UJT.

Unit III

TRANSISTORS - Characteristics, Current components, Current gains: alpha and
beta. Variation of transistor parameter with temperature and current level, Operating
point, Hybrid model, DC model of transistor, h-parameter equivalent circuits. CE,
CB and CC configuration. DC and AC analysis of single stage CE, CC (Emitter
follower) and CB amplifiers AC & DC load line, Ebers-Moll model. Biasing &
stabilization techniques. Thermal runaway, Thermal stability.

Unit IV

JFET & MOSFET - Construction and operation, Noise performances of FET,
Parasitic of MOSFET, Small signal models of JFET & MOSFET, Biasing of JFET's
& MOSFET’s, Low frequency single stage CS and CD (source follower) JFET
amplifiers, FET as voltage variable resistor and FET as active load.

Unit V

SMALL SIGNAL AMPLIFIERS AT LOW FREQUENCY - Analysis of BJT
and FET multistage amplifier, DC and RC coupled amplifiers. Frequency response
of single and multistage amplifier, mid-band gain, gains at low and high frequency.
Analysis of DC and differential amplifiers, Miller's Theorem, use of Miller and
bootstrap configuration. Cascade and cascode configuration of multistage amplifiers
(CE-CE, CE-CB, CS-CS and CS-CD), Darlington pair.