Aug 28, 2014 #1 H hhq414 Member level 1 Joined Mar 30, 2007 Messages 37 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,286 Activity points 1,529 Hi all, There is a sigma-delta pll. When the divide ratio is integer and sdm (with dither) is on, the tested phase noise profile is fluctuating largely. But when the divide ratio is fractional, the fluctuation is very small. What's the reason?
Hi all, There is a sigma-delta pll. When the divide ratio is integer and sdm (with dither) is on, the tested phase noise profile is fluctuating largely. But when the divide ratio is fractional, the fluctuation is very small. What's the reason?