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F2109 Pages: 2

Explain the working of photodiode and LED with suitable diagrams.

Module III
Explain the concept of feedback mechanism,what are the different types? What
are the typical use of each type? ச

Define peak inverse voltage (PIV). Explain the working of a full wave bridge
rectifier.
OR |
What is an oscillator? What are the different types?Explain the working of an RC
phase shift oscillator.
Module IV
What is the importance of an operational amplifier? Design a non-inverting
amplifier with a gain of 11.
Explain the working of a function generator.
OR
With suitable diagrams explain the working of digital storage oscilloscope. List
out its advantages over analog CRO.
Module V
Draw the spectrum of AM signal with a sinusoidal input and also specify the
differences in AM and FM with respect to:
i) Modulation index ii) Bandwidth
Draw the block diagram of FM super-heterodyne receiver and explain its
working.
OR
What are the major applications of satellite communication? What are the
different types of orbits used? Which band is used for satellite communication?
What are geostationary satellites? Why are they called so? What are their
advantages?
Module VI
Draw the block diagram of optical communication explain?
Draw the block diagram of DTH system and explain its operation.
OR
Explain the concept of cells and frequency reuse in mobile communication.

Explain the working of cable TV system.
‏اد بد بد ید‎

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