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 wave.

Answer 1

Block diagram of detector for AM signal is shown.

Detection is the process of recovering the modutating signal from the modulated carrier wave. The modulated signal of the form is first passed through a rectifier to produce the output. This envelop of signal is the message signal. To obtain modulating signal m(t) the signal in passed through an envelop detector.