[ibis-macro] Re: Problem with IBIS-AMI clock_times definition
- From: "Tom Dagostino" <tom@xxxxxxxxxxxxx>
- To: <msteinb@xxxxxxxxxx>, <Arpad_Muranyi@xxxxxxxxxx>
- Date: Thu, 18 Jun 2009 10:03:51 -0700
http://www.physlink.com/education/AskExperts/ae258.cfm
http://findarticles.com/p/articles/mi_m1200/is_n24_v153/ai_n27539450/
There are theories that quantize space and time.
Tom Dagostino
Teraspeed(R) Labs
13610 SW Harness Lane
Beaverton, OR 97008
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503-430-1285 FAX
tom@xxxxxxxxxxxxx
www.teraspeed.com
Teraspeed Consulting Group LLC
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-----Original Message-----
From: ibis-macro-bounce@xxxxxxxxxxxxx
[mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Mike Steinberger
Sent: Thursday, June 18, 2009 9:43 AM
To: Arpad_Muranyi@xxxxxxxxxx
Cc: IBIS-ATM
Subject: [ibis-macro] Re: Problem with IBIS-AMI clock_times definition
Arpad-
What I remember from my days as a Physics undergrad is that only energy
is quantized, as states of particles. Some particles can be found at
rest (Fermi particles if I remember or ever understood correctly) and
some cannot (Bose particles, I think). Space and time can be warped
through relativistic effects, but they are truly continuous.
Mike S.
Muranyi, Arpad wrote:
> Mike,
>
> On a different note, regarding:
>
> "At a higher level, you remind us of the sad fact that in the EDA
> business, we're attempting to use a mechanism that's inherently
> quantized in time, space, and amplitude (a digital computer running a
> sampled data analysis) to create the illusion of results one would get
> from a continuous World."
>
> I wonder about the "continuous World" statement. As far as I
> remember physics from school, everything is quantized. But you
> got me thinking here. I can see how voltage is quantized, due
> to the situation with those nasty little electrons in the atoms,
> but is time and space (distance) quantized also? Can you (or
> anyone else) refresh my memory on that?
>
> Thanks,
>
> Arpad
> =======================================================================
>
>
>
> -----Original Message-----
> From: Mike Steinberger [mailto:msteinb@xxxxxxxxxx]
> Sent: Wednesday, June 17, 2009 6:14 PM
> To: Muranyi, Arpad
> Cc: IBIS-ATM
> Subject: Re: [ibis-macro] Re: Problem with IBIS-AMI clock_times definition
>
> Arpad-
>
> Thanks for the clarification. It helps me understand the context of your
> question, although it leaves me wondering how it is that you came to
> tackle the problem you appear to be tackling.
>
> In particular, you seem to be assuming that the EDA platform needs to
> calculate the same clock ticks as the model, and somehow the two
> calculations are supposed to agree. In point of fact, I don't remember
> anything in the IBIS AMI spec which even mentioned having the EDA
> platform calculate any clock ticks, much less place any requirement on
> such a calculation. Furthermore, the receiver model is expected to
> contain information about the clock recovery that the EDA platform could
> not possibly have, and the receiver model expresses that information in
> the form of clock ticks. That's the only way that the EDA platform gets
> to find out about the behavior of the clock recovery algorithm in the
> first place.
>
> You quite correctly and clearly demonstrate that two algorithms which
> mathematically should give the same result in fact do not. For the
> particular calculation you describe, I use yet another algorithm which
> yields even more precise results. In fact, I've used the same algorithm
> in at least two very different programming languages.
>
> At a higher level, you remind us of the sad fact that in the EDA
> business, we're attempting to use a mechanism that's inherently
> quantized in time, space, and amplitude (a digital computer running a
> sampled data analysis) to create the illusion of results one would get
> from a continuous World. It can be a thankless task when our customers
> point out that the illusion didn't quite work.
>
> Mike S.
> ---------------------------------------------------------------------
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