Question
Draw a block diagram of a detector for AM signal and show, using necessary processes and the waveforms, how the original message signal is detected from the input AM waves.
Solution
Detection is the process of recovering modulating signal from the modulated carrier wave.
On receiving the message, the modulated signal is passed through a rectifier and an envelope signal is produced. This envelope signal is the message signal. The message signal is retrieved by passing it through an envelope detector. This way, modulating signal is obtained.
