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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
Icon for Honored Contributor rankHonored Contributor
16 years ago

Hi again people.

Thank you for your replies. I struggled the whole of today to implement the PLL in Quartus but I couldnt get it right. one of my problems was that I have no control over the output bit width of some of the megacores (like te filter). The NCO also determines the input bit width according to my specs & this causes there to be a mismatch between the subsystems.

Would the NCO be able to output a 5MHz & 20MHz singal from a locked 31,250KHz signal anyway?