[ibis-macro] Clocks

  • From: Scott McMorrow <scott@xxxxxxxxxxxxx>
  • To: IBIS-ATM <ibis-macro@xxxxxxxxxxxxx>
  • Date: Wed, 31 Mar 2010 19:57:13 -0400

We've been pondering several things over here in TeraspeedLand (sung to the tune of JungleLand, by Bruce Springsteen)


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Given a SerDes channel where:

   * the Tx reference clock is based upon an external clock with it's
     own unique stochastic properties
   * the reference clock is then forwarded from the Tx to the Rx
   * the Receiver uses the forwarded clock as the reference for a CDR
   * there are both deterministic and random components to the clock
     noise statistics

How would IBIS-AMI be used to model the impact of PLL jitter transfer, amplification, and noise-injection, along with integrating that into modeling and simulation of the PLL loop dynamic effect on DFE cascade errors?

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Given a SerDes receiver where:

   * the reference clock is derived from an external clock source with
     it's own deterministic and random stochastic noise profile
   *

   * How would IBIS-AMI be used to model the impact of these noise
     sources on the PLL loop dynamics, and their subsequent impact on
     equalization and data recovery?

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Given compliance correlation studies on a serdes receiver:

   * how can noise injected into the reference clock be modeled, along
     with it's impact on equalization and data recovery?

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As you can see, I'm wondering how clock "stuff" fits into the flow.


regards,

Scott


--
Scott McMorrow
Teraspeed Consulting Group LLC
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(401) 284-1840 Fax

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