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Altera_Forum
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14 years ago

NCO phase drift

Hello, I have an NCO generating a 60 Hz sine output. input clk = 10 khz phase accumulator precision = 32 bits angular resolution = 32 bits magnitude precision = 10 bits phase incr...
Altera_Forum's avatar
Altera_Forum
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14 years ago

It is true that if your tuning word is rounded(in any way) it means phase drift will occur no matter what resolution you use. see my matlab model here:

http://www.dsprelated.com/showcode/240.php

For 60Hz you will need your clock to be integer multiple of 60 e.g. 60KHz and then your modulo can not be power of 2.