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The Designer's Guide Community Forum › Measurements › Phase Noise and Jitter Measurements › Fractional-N synth phase noise measurements
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Fractional-N synth phase noise measurements (Read 3399 times)
benbassa
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Fractional-N synth phase noise measurements
Jan 31st, 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,
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Jitter Man
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Am I? Or am I so
sane that u just
blew your mind?

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Re: Fractional-N synth phase noise measurements
Reply #1 - Jan 31st, 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/.

Jitter Man
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benbassa
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Re: Fractional-N synth phase noise measurements
Reply #2 - Jan 31st, 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,
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