I used ADIsimPLL to help designing a loop filter, but the output signal is unsatisfying.
The reference clock frequency is 25MHz, and the PDF is 5MHz for which R=5.
My desired output is 22.4GHz, so here is the spectrum result.
Maybe there are some wrong usage when I using ADIsimPLL, but I've tried several combination. Does anyone encountered the same problem?
I appreciate if someone can help me with my puzzle. Thanks a lot!