"Michael Black" schrieb im Newsbeitrag
...
"Henry Kiefer" ) writes:

Everywhere I read about the necessity to remove AM. If the band is used
for
FM only, why then remove the not found AM in it?

The limiting has nothing to do with receiving FM, it has everything to do
with getting rid of QRN.

Armstrong pursued FM because he wanted some system that was more noise
free than AM. Since FM does not have an amplitude componenet, that means
you can limit to clear out the QRN and some of the fading. The limiting
is what makes FM so appealling. Take out the limiter and the FM
demodulator
will still work fine, but there'll be little point in switching to FM.

OK Michael. So it is for fight against QRN and fading, not primary for being
immune to AM.
As my Spice simulations suggest; the FM demodulator works almost completely
comparable in analog (=not limiting) and digital (=limiting) mode.

What about the performance comparision of PLL demod and quadrature demod
concepts? Seems no much difference?

regards -
Henry