Hi,all

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?

Thanks.

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?

Thanks.

Do you have a PLL without a mixer working?

Are you doing in integer-N or a fractional-n Design

Dave