[ibis-macro] Re: BIRD 123.2 Intended Usage
- From: "Walter Katz" <wkatz@xxxxxxxxxx>
- To: <gedlund@xxxxxxxxxx>, "'IBIS-ATM'" <ibis-macro@xxxxxxxxxxxxx>
- Date: Wed, 25 Apr 2012 17:48:37 -0400 (EDT)
Greg,
If statistical, then there is no way the DLL can handle jitter, and it
must be handled by the EDA tool with the "Statistical" BIRD 123
parameters. If time domain, there are two issues. First, the DLL cannot
handle the jitter on the reference clock. Second, any Rx Gaussian Jitter
(therefore have tails), has limited statistical affect because of the
limited length of time domain simulations (~1e6 bits), so having the EDA
tool incorporate that jitter is more accurate.
Walter
From: ibis-macro-bounce@xxxxxxxxxxxxx
[mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Gregory R Edlund
Sent: Wednesday, April 25, 2012 4:27 PM
To: 'IBIS-ATM'
Subject: [ibis-macro] BIRD 123.2 Intended Usage
I'm addressing this question to the authors of BIRD 123.2, Walter, Mike,
and Todd.
As I understand this BIRD, the model developer has two choices for how to
model jitter: 1) inside the DLL or 2) outside the DLL using the BIRD
123.2 parameters. What factors might influence a model developer to
choose option 1 over 2? Can someone give me an example?
Greg Edlund
Senior Engineer
Signal Integrity and System Timing
IBM Systems & Technology Group
3605 Hwy. 52 N Bldg 050-3
Rochester, MN 55901
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