RE: [IBIS] Clarification on AMI standard: Sample Interval & Samples per bit

Estella,

"Sample_Interval" has no effect on filter coefficients. Although it is
convenient to think of "Sample_Interval" as being derived from some number
of samples per bit, there is no requirement that there be a rational
relationship. There is a bit_time, and the tap filter is normally
represented inside of the model as affecting uniform bit_times, but this
is also not a requirement. Taps can have non-uniform, tap spacings that
can be longer or shorter than bit_time.

Walter

-----Original Message-----
From: owner-ibis@eda.org [mailto:owner-ibis@eda.org] On Behalf Of Muranyi,
Arpad
Sent: Tuesday, March 08, 2011 1:52 PM
To: ibis@eda.org; ibis-users@eda.org
Subject: RE: [IBIS] Clarification on AMI standard: Sample Interval &
Samples per bit

Estella,

I can't this of a reason why it should have an effect on the filter
coefficients (taps). Can you give an example for that?

Arpad
=======================================================

-----Original Message-----
From: owner-ibis@eda.org [mailto:owner-ibis@eda.org] On Behalf Of Silva,
Estella
Sent: Tuesday, March 08, 2011 12:39 PM
To: ibis@eda.org; ibis-users@eda.org
Subject: [IBIS] Clarification on AMI standard: Sample Interval & Samples
per bit

Hello,

I just want to clarify "Sample_Interval" / "SamplesPerBit".
Does any change in Sample_Interval / SamplesPerBit only affect sampling,
or does it also affect filter coefficients?

Thanks & best regards,
Estella Silva
National Semiconductor
(408) 721-7678

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