How can an amplitude modulated wave be detected ?

Explanation

A block diagram of a typical receiver is shown in figure . Detection is the process of recovering the modulating signal from the modulated carrier wave .
We just saw that the modulated carrier wave contains the frequencies `omega_(c) and omega_(t) pm omega_(m) . ` In order to obtain message signal m(t) of angular frequency `omega_(m)` , a simple method is shown in figure .
The modulated signal is passed through a rectifier produces the output message signal .
This message signal is passed through envelope detector (RC circuit) .