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Measurements >> Phase Noise and Jitter Measurements >> Fractional-N synth phase noise measurements
https://designers-guide.org/forum/YaBB.pl?num=1107179605

Message started by benbassa on Jan 31^st, 2005, 5:53am

Title: Fractional-N synth phase noise measurements
Post by benbassa on Jan 31^st, 2005, 5:53am

Hi,

Does any one have an idea how to simulate the phase noise of a fractional-N synthesizer in spectre ?

I read somewhere that since its not periodic the simulator fails to converge.

Thanks,

Assaf,

Title: Re: Fractional-N synth phase noise measurements
Post by Jitter Man on Jan 31^st, 2005, 10:52am

It is not easy, but it is also not impossible. You can read about it in "Modeling jitter in PLL-based frequency synthesizers" in http://www.designers-guide.com/Analysis/.

[glb]Jitter Man[/glb]

Title: Re: Fractional-N synth phase noise measurements
Post by benbassa on Jan 31^st, 2005, 11:26pm

Thanks,

But I was looking for a direct way so the real devices will be simulated.

Not to use a model for simulation.

Assaf,