Hi all,

I am new in this area. Suppose that I have a non-ideal clock waveform with non-equal periods, e.g. first cycle period = 1 ns, second cycle period = 1.001 ns, etc:
- How can I get the phase noise using this data?
- Can I just directly apply FFT to it?
   - If yes, how to determine the x-axis value if I put it into a plot?

Thanks in advance! =D

Hello

If you have a look at the paper "Predicting the phase noise and jitter of PLL-based frequency synthesizers" which is on this website there in Listing 17 is a wee  matlab script that does the trick.

Regards,