The equation defining the AM envelope is
A) e = Ec sin wc*t
B) e = Ei sin it + sin wc*t
C) e = Ec sin wc*t e = Ei sin wi*t
D) e =(Ec +Ei sin wi*t) sin wc*t
E) none of the above

Question

Quizplus · Accepted Answer

The correct equation for the AM envelope is $e =(E_c +E_i \sin w_i*t) \sin w_c*t$, where $E_c$ is the carrier amplitude, $E_i$ is the modulation amplitude, $w_c$ is the carrier frequency, and $w_i$ is the modulation frequency. This equation represents how the amplitude of the carrier wave varies (modulates) in accordance with the information signal.

The Equation Defining the AM Envelope Is