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deterministic jitter in serdes receive data (Read 921 times)

feiyue Junior Member Offline Posts: 15	deterministic jitter in serdes receive data Jul 26^th, 2004, 11:18pm Dear all, who knows the jitter concept well about Serdes and the deterministic jitter's PSD? Is it uniform distribution or other kind of distribution? I am doing some system simulation and not clear how to deal with this kind of jitter? I will greatly appreciate for your help! feiyue
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DReynolds

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Scarborough ME

Re: deterministic jitter in serdes receive data
Reply #1 - Mar 30^th, 2005, 6:34am

feiyue, deterministic jitter can have many different kinds of psd depending on the cause. Being deterministic, it could be relaled to the data pattern itself or it could from an interfering tone like an clock.

Can you explain a little more about the purpose of the sims you are doing... it might make it easier to understand what to suggest.

David Reynolds

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Paul

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Switzerland

Re: deterministic jitter in serdes receive data
Reply #2 - Mar 30^th, 2005, 10:39pm

Feiyue,

the way most shorts-distance standards (ethernet, fibre channel, InfiniBand, etc) apply jitter to the input is signal is explained in this document:
ftp://ftp.t11.org/t11/pub/fc/mjsq/04-101v4.pdf

Modeling it is uniform is OK as a first estimate, but probably you want to develop a more accurate model based on this spec later.

Paul

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feiyue Junior Member Offline Posts: 15	Re: deterministic jitter in serdes receive data Reply #3 - Mar 31^st, 2005, 8:19pm hi David and Paul, I was assigned to design a 1.25Gbps serdes receiver and need to modeling the receivered data with jitter for circuit simulation. Just as Paul have said,I model it as uniform distribution, I think it is enough for circuit simulation. Thanks both of you! feiyue
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