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Measurements >> Phase Noise and Jitter Measurements >> Ken, please have a look
https://designers-guide.org/forum/YaBB.pl?num=1147868222

Message started by lunren on May 17^th, 2006, 5:17am

Title: Ken, please have a look
Post by lunren on May 17^th, 2006, 5:17am

Dear Ken,

Nice to meet you here. I know you wrote some paper about pll phase noise simulation method with spectreRF (pss, pnoise etc. analysis). But I can't find them in this forum. I am now designing a cmoc vco and want to simulate the phase noise characeristics, but after read spectreRF manual, I still don't know exactly how to use pss and pnoise to simulate the phase noise. Could you give me the link of such paper. I need such help eagerly. Thanks very much in advance.

Best regards,
Lunren

Title: Re: Ken, please have a look
Post by swicap on May 17^th, 2006, 6:04am

http://www.designers-guide.org/Analysis/

Title: Re: Ken, please have a look
Post by lunren on May 17^th, 2006, 7:04pm

Thanks. Now I can run the pss and pnoise simulation in my work, but I still confused by several questions:
1) Does pnoise simulation don't need such parameters as flicker noise parameters:ＫＦ　ｏｒ　ＡＦ? If the model doesn't have such parameters, how can the simulation result be reliable?
2) How can we set the frequency sweep range rationally? For example, If my VCO oscillation frequency is 500MHz, and my PLL output frequency is 125MHz(divided by 4).
3) After we get the phase noise result, how can we get jitter characteristcs?
4) What's the exact meaning of BEAT FREQUENCY? If my PLL input is 50MHz, the VCO freqency is 500MHz, How can I set the beat frequency? 500MHz or 50MHz?