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Altera_Forum's avatar
Altera_Forum
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16 years ago

NCO:Sine Waveform

Hi. I am trying to use the NCO to generate the sine waveform. However, the waveform obtained is different where it is attached. May i know where to modify it in order to get the correct the sine wave...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

The Tco as reported by quartus is meant at the output pins and not the internal registers.

From your simulation diagrams I can estimate Tco = 7.4 ns in either case(25MHz or 125MHz) assuming my eyesight is ok

---|--------------40 ns ------------|

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---|- 8ns --|

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