Electronics Handbook/Electronic Machines/Audio Machines/Radio

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Radio[edit | edit source]

Configurations[edit | edit source]

Basic Configuration[edit | edit source]

Basic Configuration requires two components Microphone connect with Speaker in a closed loop

Microphone + Speaker

Enhanced Configuaration[edit | edit source]

Microphone + Amplifier + Volume Control + Speaker

Radio Band Broadcasting[edit | edit source]

AM

Sound wave is tured into Standing Wave then mixed with Carrier wave to produce broadcasting wave called AM . This method requires the amplitude of the Carrier wave varies with the amplitude of the Sound wave's Enevelop

FM

Sound wave is mixed with Carrier wave to produce broadcasting wave called FM . In this method the amplitude of Sound wave and Carrier wave is unchanged only the frequency is changed

PM

Sound wave is shifted and mixed with Carrier wave to produce broadcasting wave called PM . In this method the amplitude of Sound wave and Carrier wave is unchanged only the Phase is changed
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