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SYLLABUS

Unit-1

P-N junction Diode: Qualitative theory of the p-n junction, p-n junction as a diode, current components in a p-n diode, Volt-Ampere characteristics, Temperature dependence of p-n diode characteristics, Diode resistance, Qualitative treatment of Transition and Diffusion capacitances. Diode as Rectifier: Half wave and Full wave rectifier, Bridge rectifier, Filters – Inductor and Capacitor Filter. Ripple factor with and without filters.

Unit-2

Special Purpose Diodes: Zener versus Avalanche breakdown, Principle of operation, characteristics and applications of Zener diode, Tunnel diode, Photo diode, LED, PIN diode, Schottky barrier diode and Varactor diode. Bi-Polar Junction Transistor: Junction transistor, Transistor current components, Transistor as an amplifier, Input and Output characteristics of BJT in Common Base, Common Emitter and Common Collector configurations. Transistor as a switch.

Unit-3

Transistor biasing and Stabilization: The Operating Point, DC & AC load lines, Bias Stability, Fixed Bias, Collector-to-Base Bias, Self-Bias, Bias Stabilization, Bias Compensation, Thermistor and Sensistor Compensation, Thermal Runaway, Thermal Stability. Small Signal Low-frequency Transistor Models: Transistor Hybrid Model, Determination of the h parameters from the characteristics, Analysis of Transistor amplifier using h parameters, Comparison of Transistor amplifier configurations.

Unit-4

Low-frequency Transistor Amplifier Circuits: Simplified Common-emitter Hybrid Model, Simplified Calculations for the Common-Collector, Common-base and Common-emitter amplifier, Common emitter amplifier by passed and n-bypassed Emitter Resistance, Miller’s Theorem, Dual of Miller’s Theorem.

Unit-5

Field-effect Transistors: The Junction Field-effect Transistor, The Pinch-off Voltage, The JFET VoltAmpere Characteristics, MOSFET characteristics (Enhancement and depletion mode), The FET and MOSFET Small-signal Model, Biasing of FET and MOSFET. The Common-source Amplifier, The Common-drain Amplifier, A Generalized FET Amplifier, The FET as a Voltagevariable Resistor. The Unijunction Transistor.