Name of Subject  :  ELECTRONIC DEVICES & CIRCUITS  ( 3 IT 2)

Unit

Contents

I

Diode circuits:  Diode as a circuit. Element, load line concept, clipping & clamping circuits, voltages multipliers.

Devices: construction, characteristics and working principles of the following devices. Diodes, BJT, JFET,

II

MOSFET, UJT, photo diodes, LEDs, photo transistors. Solar cells. Thermistor, LDR.

Transistors: transistor characteristics, current components, current gains. Alpha and vita. Operating point. High

bride model, h- parameter equivalent circuits. Ce, Cb and Cc configuration. Dc and ac analysis of Ce, Cc and Cb

III

amplifiers. Evers- moll model. Biasing and stabilization techniques. Thermal run away, thermal stability. Equivalent

circuits and blessing of JFETs and MOSFETs. Low frequency Cs and Cd JFET amplifiers. FET as a voltage

variable resistor.

Small signal amplifiers at low frequency: analysis of BJT and FET, dc and rc coupled amplifiers. Frequency

IV

response, midband gain, gains at low and high frequency. Analysis of dc and differential amplifiers, Millers’

theorem. Cascading transistor amplifiers, Darlington and cascaded circuits. Emitter and source followers.

Oscillators: concept of feedback classification, criterion for oscillation. Tuned collector, Hartley, Colpitts , rc- phase

V