Question

Figure shows a block diagram of a detector for amplitude modulated signal. Identify the boxes ${}^{\prime }{X}^{\prime }$ and ${}^{\prime }{Y}^{\prime }$ and write their functions.

Answer 1

Here $X\to$ Rectifier
$Y\to$ Envelope detector
Rectifier: It allows only the positive half of the AM input wave to go onwards.
Envelop Detector: It separates the message signal from the carrier wave.