Question

explain why it is possible to create a modulated signal mtcoswct
using a switching modulator

Answer #1

I am sketching amplitude modulated signal in time domain.
I can sketch it when modulated signal Xc(t) is like (1 +
m(t))s(t) where m(t) is a modulating signal and s(t) is a carrier
signal.
but when modulated signal has different equation, I don't know
how to sketch it.
for example, modulated signal Xc(t) =
sin(2pi100000t)sin(2pi1000t).
so I have searched about it and I found someone convert
sin(2pi100000t)sin(2pi1000t) form to (1 + m(t))s(t) form.
but now I don't know how to...

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