Unit1. PN JUNCTION DIODES: Open-circuited p-n junction and space
charge region. The biased p-n junction, volt-ampere characteristics, cutin
voltage and effect of temperature on V-I characteristics. Minority carrier
density distribution in (i) a forward biased junction and (ii) a reverse
biased junction. Diode capacitances. Junction diode switching times and
characteristics.
OTHER DIODES: Avalanche breakdown and zener breakdown. Working principles
of zener diodes, photo-diodes, light emitting diodes, solar cell and
varactor diodes.
Unit2. ANALYSIS OF DIODE CIRCUITS: Diode as a circuit element, load
line, small signal diode model and large signal diode model. Analysis of
half wave and full wave single-phase rectifiers, peak inverse voltage.
Various types of filters, their analysis and applications. Voltage
multipliers, clipping and clamping circuits.
Unit3. BIPOLAR JUNCTION TRANSISTORS (BJTs): p-n-p and n-p-n
transistors, transistor current components. Common base (CB) and common
emitter (CE) configurations: input & output characteristics, current
gains: alpha & beta. Transistor operating regions: active region,
saturation region and cutoff region. Common collector configuration. BJT
biasing and dc models. Thermal stability and stabilization techniques.
Small signal models: h-parameters and hybrid pie models. BJT as a switch.
Minority carrier concentration in the base for cutoff, active and
saturation conditions, transistor switching times and characteristics.
Transistor ratings.
Unit4. FIELD EFFECT TRANSISTORS: Construction, working, V-I
characteristics and transfer characteristics of JFET. MOSFET: Enhancement
type and depletion type: construction, working, V-I characteristics, and
transfer characteristics. DC analysis of FETs. FET as a voltage variable
resistor. FET small signal models. FET as a switch. CMOS.
Unit5. SMALL SIGNAL AMPLIFIERS: Analysis of BJT and JFET amplifiers
at low frequency: input and out resistances, voltage and current gains.
Frequency response of common emitter transistor amplifier at high
frequency. Miller’s theorem and its dual. Cascaded BJT amplifiers.
Darlington pair and Bootstrapped Darlington circuit.
|