Amplitude modulation is used since the first days of the 20th century mainly for transmitting voice and signals through the conventional broadcast band like the long-, medium- and short wave bands because of its easy and cheap way of realisation.
Besides the consumption of bandwidth in comparison to usual FM is relatively small and the receivers could be made up very simple.
Standard AM system
AM is an important method for transmitting information. We shall state the circuits used in the modulation and demodulation of the AM signals.
References
References
