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I Diode
circuits: diode as a ckt. Element, load line concept, clipping &
clamping circuits, voltages multipliers.
II Devices: construction, characteristics and working principles of
the following devices. Diodes, bjt, jfet, mos fet, ujt, photo diodes, LEDs,
photo transistors. Solar cells .thermistor, LDR.
III 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 amplifiers. Evers- moll model. Biasing and
stabilization techniques. Thermal run away, thermal stability. Equivalent
circuits and blessing of JFETs. And MosFET,s. Low frequency cs and cd JFET
amplifiers . Fet as a voltage variable resistor.
IV Small signal amplifiers at low frequency: analysis of bjt and
fet, dc and rc coupled amplifiers. Frequency response, midband gain, gains
at low and high frequency. Analysis of dc and differential amplifiers,
millers’ theorem. Cascading transistor amplifiers, darlington and cascaded
ckts. Emitter and source followers.
V Oscillators: concept of feedback classification, criterion for
oscillation. Tuned collector, hartely, colpittes , rc- phase shift , wein
bridge and crystal oscillators , astable, monostable and bistable
multivibrators . Schmitt trigger.
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