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A192016 Pages: 2

Briefly explain
i) LED (10)
ii) Photo diode

iii) Solar cell

Module 111
Explain the working of a Bridge rectifier with relevant waveforms (7)
What is PIV? What are its values for Half wave and Centre tapped Rectifiers? (3)
OR
What is a Barkhausen criterion? Explain the working of a RC phase shift (10)
Oscillator?
Module 1V
What are universal gates ? Why they are called so ? (4)
Explain the working of digital multimeter with a block diagram (6)
OR
Draw and explain the functional block diagram of operational amplifier (6)
Draw the circuit diagram and derive the gain of a non-inverting amplifier. (4)
Module V
Explain how the geo-stationary satellite covers full earth? Mention its (6)
applications.
List out the major merits of satellite communication. (4)
OR
What are the needs of modulation in a communication system. (6)
Draw the spectrum of AM signal with a sinusoidal input (4)
Module VI
Explain the working of cable TV distribution system. (10)
OR

Explain optical fibre communication system with block diagram. What are the (10)

different types of optical fibre cables used in optical communication?
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