Question

Which condition is to be satisfied in an AM detector circuit so that the signal corresponds to an envelope ______ of the carrier wave ? 

(A) Tc << RC 

(B) Tc >> RC 

(C) Fc << RC 

(D) (1/fn) << RC

Answer 1

The correct option is (A) T_c << RC.

Explanation:

For better detection of modulated signal, time constant of RC filter should satisfy Tc << RC 

where T_c = (1 / wc) = [1 / (angular frequency of the carries)]