in books, AM always described as y(t) = [A + m(t)].c(t), where c(t) refers to carrier wave, m(t) is baseband/modulating signal.
A sometimes be explained as the amplitude of m(t). Because of the existance of 'A', the carrier part be kept together with upper and lower side band.
However, when we decribe DSB, 'A' be removed from equation, as a result, carrier be suspressed and only upper and lower side band remains.
I am not clear, how does 'A' be represented in hardware(real circuits)? How to remove 'A' in circuits?
A sometimes be explained as the amplitude of m(t). Because of the existance of 'A', the carrier part be kept together with upper and lower side band.
However, when we decribe DSB, 'A' be removed from equation, as a result, carrier be suspressed and only upper and lower side band remains.
I am not clear, how does 'A' be represented in hardware(real circuits)? How to remove 'A' in circuits?