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a)

010BE10104092002

Differentiate between zener and avalanche breakdown.

b) Explain the working of a Varactor diode. List its applications.

a)

MODULE 111
Find the values of resistances Ri, Ro, Re, Re for a voltage divider biasing
circuit. Given Vcc=10V, ‏101۸ح[‎ , B=100 and Vcg=50% of Vcc
OR
Explain the input and output characteristics of an NPN transistor in common
emitter configuration.
MODULE IV
With a neat sketch explain the working and drain characteristics of an N-
channel depletion type MOSFET.
OR
Draw the structure of an SCR and explain its V-I characteristics.
MODULE V
Draw the circuit and explain the working of a bridge rectifier. Derive the
Irms, 10൦ and ripple factor of a bridge rectifier.
OR
Explain the working of a negative clamping circuit. Draw a circuit to clamp
a given 10Vpp sine wave negatively by -4V and also draw its input and
output waveforms.
MODULE VI
Draw the block diagram of a Digital Storage Oscilloscope. Explain how
amplitude and frequency can be measured using a CRO.
OR
Draw and explain the block diagram of a generalised instrumentation

system.

b) Define any four performance parameters of an instrument.

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