Electronics Handbook/Electronic Machines/Audio Machines/Radio

Radio

 * Radio.jpg

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

Enhanced Configuaration

 * Microphone + Amplifier + Volume Control + Speaker

Radio Band Broadcasting
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