Amplitude Modulation
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Amplitude Modulation Mathematics…….
description
AM lecture of Najeeb Haider Zaidicourtesy; my teachers
Transcript of Amplitude Modulation
Amplitude ModulationMathematics…….
Amplitude Modulation
Modulated Signal
Frequency Domain
AM Wave
+Vmin=Ec-Em
+Vmax=Ec+Em
-Vmin=-Ec+Em -Vmax=-Ec-Em
Ec
Em
Modulation Index
Mathematical Representation
If Em=mEc
Or
Or
Side Bands
Re organizing the equation
Therefore
Why? sinA x sinB = 1/2[cos(A - B) - cos(A + B)]Upper Side Band
Lower Side Band
Carrier Signal
Frequency Domain Representation
Power Distribution of AM Signal
Current Calculations