Hi,
I have to write a report about envelope detectors for AM signals and have a few questions that I just cannot find the answers to and so I'm hoping someone here could help me.
Here are the questions:
1) Why is an envelope detector very susceptible to noise?
2) Why can a DSB-SC signal not be demodulated with an envelope detector?
3) Why does the envelope detector not work if the Carrier signal from a DSB-SC is added back in but is out of phase?
I think 2 and 3 are probably linked and it is just a case of me not fully understanding how it works.
I would greatly appreciate any help.