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How to simulate pll &nbspwith mixer in feedback p

Question asked by ZHIWEI_CUI Employee on Oct 9, 2007
Latest reply on Jun 14, 2013 by hopsynth
I want to simulate the phase noise characteristics of pll with a mixer in the feedback path with the envelope simulator, the simulated results show that the closed loop phase noise are same with that of the open loop.It is obvious that these results are not correct.
Then how to solve this problem?