Question

The amplitude modulated wave, shown here, is processed (at the receiver end), successively, into the forms (a) and (b), shown alongside.

The devices, used for getting the AM input wave into the forms (a) and (bv), are known, respectively, as

(1) rectifier and transducer

(2) rectifier and envelope detector

(3) transducer and evelope detector

(4) transducer and rectifier

Answer 1

At the receiving end, the AM intant wave is first rectified by using a rectifier. The rectified output is then processed by an envelope detector which removes its RF component and gives its envelope (the original message signal) as its output.