A 3-order MASH modulator in fractional-N pll, each stage uses a 20-bit accumulator. How fast can it work? And generally what frequency does it work at?
Thanks!
Thanks! I know the PLL Fref is the frequency it works.(The real working frequecny should be the divided vco frequency,right?) I want to know if my Fref is about 20MHz, does it need special adder? Or normal adder can reach it? And how about 4th-order MASH?