Detection Of Amplitude Modulated Wave
Chapter Name : Communication Systems |
Sub Topic Code : 101_12_15_10_01 |
Topic Name : Detection Of Amplitude Modulated Wave |
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Sub Topic Name : Detection Of Amplitude Modulated Wave |
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Introduction
Objective measurement of the degree of change (positive or negative) in atmospheric pressure (the compression and rarefaction of air molecules) caused by sound waves.
Pre-Requisites:
Amplitude
Activity:
"AM" is often used to refer to the medium wave broadcast band (see AM radio).
Real Life Question:
How to detect Amplitude Modulated Wave produced?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Amplitude | Objective measurement of the degree of change (positive or negative) in atmospheric pressure (the compression and rarefaction of air molecules) caused by sound waves. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Radio | Changes in signal strength may be used to specify the sounds to be reproduced by a change in signal strength may be used to specify the sounds to be reproduced by a loudspeaker. |
Real life uses :
Communication.
Places to visit :
Television set, Radio set, etc.
Practical examples around us
| Examples | Explainations |
|---|---|
| Radio | AM works by varying the strength of the transmitted signal in relation to the information being sent. |
What you learn in Theory:
Detection is the process of isolating the signal from its carrier.
What you learn in Practice:
Using the demodulating circuit the original signal is separated from the carrier and is fed into an amplifier, and then it is fed into the speaker.