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Forum Post: Using DAC NCO to solve LO fractional spur problem

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Hi all,

If you have LO/synthesizer debug experience, you may know "fractional spur" in fractional PLL. Some of them are easy to be suppressed by dither. Rut one kind of fractional spur, called "integer boundary spur", is hard to be handled. I find a way to solve this problem by DAC NCO, as below note illurstrates. It may help you in LO debug or system design.

(Please visit the site to view this file)


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