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Measurements >> Phase Noise and Jitter Measurements >> pss & Pnoise analysis to measure jitter in PLL
https://designers-guide.org/forum/YaBB.pl?num=1146865499

Message started by Nagendra on May 5^th, 2006, 2:44pm

Title: pss & Pnoise analysis to measure jitter in PLL
Post by Nagendra on May 5^th, 2006, 2:44pm

Hi all,
can anybody tell me how to calculate jitter in by pnoise anlysis.
i m using cadence Spectre RF as simulator. i have gone through cadence document
and did pss followed by pnoise as method explained there.
Afterthat that by using Direct plot option i ploted pnoise result i.e. sec/sqrt(Hz) vs frequecy(Hz). now can any body tell me 1)how the absolute jitter can be measured from that graph 2) How should the frequecy range over which pnoise analysis be decided. 3) does any other method to measure jitter?

thanks in advance

nagi

Title: Re: pss & Pnoise analysis to measure jitter in PLL
Post by Vick on Nov 30^th, 2006, 5:11am

Hi Nagendra,
For estimating the frequency range over witch you or Spectre calculates the jitter, It says that you must consider the linear section of the Phase Noise curve. Typical limits for this section are 10KHz-100KHz and 100MHz.