Download - Amplitude modulation
Transcript
![Page 1: Amplitude modulation](https://reader038.vdocuments.us/reader038/viewer/2022102722/556410ddd8b42aa9518b5b29/html5/thumbnails/1.jpg)
Amplitude ModulationPart - 1
![Page 2: Amplitude modulation](https://reader038.vdocuments.us/reader038/viewer/2022102722/556410ddd8b42aa9518b5b29/html5/thumbnails/2.jpg)
The AM waveform
![Page 3: Amplitude modulation](https://reader038.vdocuments.us/reader038/viewer/2022102722/556410ddd8b42aa9518b5b29/html5/thumbnails/3.jpg)
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Modulating factor (m)
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Sidebands
![Page 7: Amplitude modulation](https://reader038.vdocuments.us/reader038/viewer/2022102722/556410ddd8b42aa9518b5b29/html5/thumbnails/7.jpg)
Forms of Amplitude Mod.
power saving = 66.7% at 100%
modulation
For M = 1,power saved is 1/6
of the total transmitted power
•83.3 % power saving•50 % B.W.•Very small Power Supply•Narrow BPF limits the noise pick up
![Page 8: Amplitude modulation](https://reader038.vdocuments.us/reader038/viewer/2022102722/556410ddd8b42aa9518b5b29/html5/thumbnails/8.jpg)
Generation of DSB-SC Signals
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AM using linear devices
ωc ei(t)Bandpass
filterat ωc
eo(t)
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Ring modulator
ei(t)
Bandpass filterat ωc
eo(t)
cosωct
f(t)
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cosωct
1/2eR 1/2eR
D 1
D2
D 3
D4
a
b
ei(t)eo(t)
Double Ring modulator
![Page 13: Amplitude modulation](https://reader038.vdocuments.us/reader038/viewer/2022102722/556410ddd8b42aa9518b5b29/html5/thumbnails/13.jpg)
THANKS !