[ibis-macro] Re: Question about Receiver Sensitivity

  • From: "Walter Katz" <wkatz@xxxxxxxxxx>
  • To: <Arpad_Muranyi@xxxxxxxxxx>, <ibis-macro@xxxxxxxxxxxxx>
  • Date: Wed, 26 May 2010 15:24:29 -0400

Arpad,

Rx_Receiver_Sensitivity is similar to Vdiff in normal differential models.
Vdiff is applied in IBIS at the Rx pad of a simulation.
Rx_Receiver_Sensitivity is applied at the receiver decision point. After
equalization (the waveform output of Rx AMI_GetWave) is sampled at the clock
ticks returned from Rx AMI_GetWave. If the signal at the clock tick is >
Rx_Receiver_Sensitivity the value of the signal is "1", if
< -Rx_Receiver_Sensitivity it is a "0", if between -Rx_Receiver_Sensitivity
and Rx_Receiver_Sensitivity an error.

Walter

Walter Katz
303.449-2308
Mobile 720.333-1107
wkatz@xxxxxxxxxx
www.sisoft.com

-----Original Message-----
From: ibis-macro-bounce@xxxxxxxxxxxxx
[mailto:ibis-macro-bounce@xxxxxxxxxxxxx]On Behalf Of Muranyi, Arpad
Sent: Wednesday, May 26, 2010 2:42 PM
To: ibis-macro@xxxxxxxxxxxxx
Subject: [ibis-macro] Question about Receiver Sensitivity

Hello AMI experts,

I know this was discussed before but it is still not
clear to me how the Rx_Receiver_Sensitivity parameter
is supposed to be used.

This parameter is Type Info, meaning that it is not
passed to the DLL, it is only information for the EDA
tool.  The question is, what is the tool supposed to
do with this?

I assume that if the DLL is written correctly, it would
account for this sensitivity parameter in its algorithms
(for example in CDR), so the EDA tool wouldn't need to
adjust the returned times for the threshold (in)sensitivity.
Is the EDA too expected to do anything with the returned
waveforms when displaying eye diagrams and/or BER plots,
etc...?  If yes, what should be done?  If no, what is
the purpose of this parameter?

Thanks,

Arpad
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