Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

NCO Megacore Phase Adjust

Hello I am using the Altera Megacore NCO Compiler and need to dinamically adjust the phase of the generated sine wave. The core has an input called phase_mod_i[] which is used for this purpos...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

Build a (small) NCO. Simulate it in quartus. Set input words to 0 except the phase modulation input, which you put a count sequnce on (thats the reason I wrote small!), and you will see how it works. Thats the way I would go about... after skimming the manual of course.

My guess is that 100000000..0 is -pi and 0111111111..1 is almost pi, ie. twos complement But the simulations will tell.