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Altera_Forum
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16 years ago

PLL megacore probs.build my own??

Hi all, I want to implement a PLL that will lock onto & track an incoming signal of about 30KHz and output a multiple of that locked frequency. I tried using Quartus's PLL megacore function but...
Altera_Forum's avatar
Altera_Forum
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16 years ago

Hi again.

I took a bit of a break from my design,but Im back at it. I've figured out how to operate the NCO for my application (using it in "frequency modulation" mode). I can set the nominal frequency by giving it a certain integer constant(equations are given) and all it needs is an input from the loop filter. FvM, you mentioned some time ago that the NCO route is more labour intensive due to the NCO's digitized waveform output and that an "all digital PLL" solution would bee easier. Whats the difference between the two?