Friday, 19 May 2017
Thursday, 16 March 2017
Monday, 27 February 2017
Thursday, 11 June 2015
LICA Assignment Questions
ASSIGNMENT
QUESTIONS FOR IIIRD IAT
Unit no 6
1. Design a 2nd order HPF using IC
715 for a cut-off
frequency of 5K Hz, draw its frequency response and comment
on the same. Given IB(MAX) = 1.5 µA.
2. With a neat circuit diagram, waveform and
expressions, Explain capacitor coupled non-Inverting crossing detector.
3. With a neat circuit diagram, waveform and
expressions, Explain Inverting Schmitt- trigger circuit.
4. With a neat circuit diagram, waveform and
expressions, Explain astable multi
vibrator.
5. With a neat circuit diagram, waveform and
Explain i) zero crossing detector.
ii)
voltage regulator.
6. An Inverting Schmitt trigger circuit is
to have UTP= 0 V
and LTP = 2.5 V. Design a suitable circuit using a bipolar op-amp and a ±18
V supply.
Unit no 7
1. Explain the basic Switching Regulator
Circuit and mention its Advantages and Disadvantages.
2. Explain the working of Series Voltage
Regulator with current limit protection.
3. Mention the advantages of IC Voltage
regulator. With a neat internal block diagram of IC723 Explains the Functions of each block.
4. Explain the standard
Representation/Standards of 78XX
type Regulators.
5. Design 723 based Voltage Regulator to provide
constant VO= 20V, IOMAX = 250 mA, given VUN-REGUL =
30V±10%.
6. Explain the terms Line Regulation, Load
Regulation, And Ripple Rejection For a DC Voltage regulator.
Thursday, 6 November 2014
Tuesday, 4 November 2014
Wednesday, 29 October 2014
Tuesday, 21 October 2014
Thursday, 16 October 2014
Analog Communication (10EC53) Syllaus
ANALOG COMMUNICATION
Subject Code : 10EC53
IA
Marks : 25
No. of Lecture
Hrs/Week : 04 Exam
Hours : 03
Total no. of
Lecture Hrs. : 52 Exam
Marks : 100
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UNIT – 1
RANDOM PROCESS:
Random variables:
Several random variables. Statistical averages: Function of Random variables,
moments, Mean, Correlation and Covariance function: Principles of
autocorrelation function, cross – correlation functions. Central limit theorem,
Properties of Gaussian process. 7
Hrs
UNIT - 2
AMPLITUDE
MODULATION:
Introduction, AM:
Time-Domain description, Frequency – Domain description. Generation of AM wave:
square law modulator, switching modulator. Detection of AM waves: square law
detector, envelop detector. Double side band suppressed carrier modulation
(DSBSC): Time-Domain description, Frequency-Domain representation, Generation
of DSBSC waves: balanced modulator, ring modulator. Coherent detection of DSBSC
modulated waves. Costas loop.
7
Hrs
UNIT - 3
SINGLE SIDE-BAND
MODULATION (SSB):
Quadrature carrier
multiplexing, Hilbert transform, properties of Hilbert transform, Preenvelope,
Canonical representation of band pass signals, Single side-band modulation,
Frequency-Domain description of SSB wave, Time-Domain description. Phase
discrimination method for generating an SSB modulated wave, Time-Domain
description. Phase discrimination method for generating an SSB modulated wave.
Demodulation of SSB waves.
6 Hrs
UNIT - 4
VESTIGIAL SIDE-BAND
MODULATION (VSB):
Frequency – Domain
description, Generation of VSB modulated wave, Time – Domain description,
Envelop detection of VSB wave plus carrier, Comparison of amplitude modulation
techniques, Frequency translation, Frequency division multiplexing,
Application: Radio broadcasting, AM radio. 6 Hrs
UNIT - 5
ANGLE MODULATION
(FM)-I: Basic
definitions, FM, narrow band FM, wide band FM, transmission bandwidth of FM
waves, generation of FM waves: indirect FM and direct FM. 6
Hrs
UNIT - 6
ANGLE MODULATION
(FM)-II:
Demodulation of FM
waves, FM stereo multiplexing, Phase-locked loop, Nonlinear model of the phase
– locked loop, Linear model of the phase – locked loop, Nonlinear effects in FM
systems. 7
Hrs
UNIT - 7
NOISE: Introduction, shot
noise, thermal noise, white noise, Noise equivalent bandwidth, Narrow
bandwidth, Noise Figure, Equivalent noise temperature, cascade connection of
two-port networks. 6
Hrs
UNIT - 8
NOISE IN CONTINUOUS
WAVE MODULATION SYSTEMS:
Introduction,
Receiver model, Noise in DSB-SC receivers, Noise in SSB receivers, Noise in AM
receivers, Threshold effect, Noise in FM receivers, FM threshold effect,
Pre-emphasis and De-emphasis in FM,. 7
Hrs
TEXT BOOKS:
1. Communication
Systems, Simon Haykins, 5th Edition, John Willey, India Pvt. Ltd, 2009.
2. An Introduction to Analog and
Digital Communication, Simon Haykins, John Wiley India Pvt. Ltd., 2008
REFERENCE BOOKS:
1. Modern digital and analog
Communication systems B. P. Lathi, Oxford University Press., 4th ed, 2010,
2. Communication Systems,
Harold P.E, Stern Samy and A Mahmond, Pearson Edn, 2004.
3. Communication Systems:
Singh and Sapre: Analog and digital TMH 2nd , Ed 2007.
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