[ibis-macro] Re: DFE related query
- From: jasleen kaur <lovingjasleen@xxxxxxxxx>
- To: Walter Katz <wkatz@xxxxxxxxxx>
- Date: Wed, 14 Sep 2011 22:59:43 +0530
Thank you all for the reply.
On Tue, Sep 13, 2e011 at 10:04 PM, Walter Katz <wkatz@xxxxxxxxxx> wrote:
> Jasleen,
>
> You pass samples through the Rx DFE. The input to the Rx DFE is the output
> of the Rx CTLE. The input to the Rx CTLE is the analog waveform of the
> signal at the Rx Pad. The amplitude of the signal at the Rx Pad is a
> function of the amplitude of the signal at the Tx Pad and the channel. The
> Output of the CTLE will include CTLE gain as well as gains from an Rx AGC.
> There is a constraint on the voltage range of inputs to a Tx GetWave
> function. There are no constraints on the voltage range of inputs to the Rx
> GetWave function or any internal point within an Rx AMI model.
>
> Walter
>
> ----- Original Message -----
> From: jasleen kaur <lovingjasleen@xxxxxxxxx>
> Cc: ibis-macro@xxxxxxxxxxxxx, msteinb@xxxxxxxxxx
> Sent: Tue, 13 Sep 2011 11:05:25 -0400 (EDT)
> Subject: [ibis-macro] Re: DFE related query
>
> So my question is after sampling, should I pass samples or symbols (0 & 1)
> through DFE?
>
>
> Thanks
>
> On Tue, Sep 13, 2011 at 8:22 PM, Ambrish Varma <ambrishv@xxxxxxxxxxx>
> wrote:
>
> > **
> >
> > Hi Jasleen,****
> >
> > The input to the RX Getwave are time domain waveform samples that the EDA
> > tool passes to the AMI model. The waveform passed to the model is an
> analog
> > waveform between -0.5 and +0.5 (any voltage value between those 2
> numbers)
> > sampled at regular interval – for example, 1 bit can be sampled 64 or 128
> > times or any other number (this number can be chosen by the tool, or the
> > tool can let the user select it too). Once those samples are inside the
> AMI
> > model, the waveform processing is generally done in the model (filter)
> > discretely – ie, there is a voltage value for every corresponding time
> step.
> > ****
> >
> > Not completely sure if this is what you are looking for.****
> >
> > ** **
> >
> > Thanks,
> > Ambrish.****
> >
> > ** **
> >
> > ** **
> >
> > ****
> >
> > ****
> >
> > ****
> >
> > ***Ambrish Varma*** | Member of Consulting Staff****
> >
> > P: 978.262.6431 www.cadence.com****
> >
> > ** **
> >
> > ****
> >
> > ** **
> >
> > ** **
> >
> > ** **
> > ------------------------------
> >
> > *From:* **ibis-macro-bounce@xxxxxxxxxxxxx** [mailto:**
> > ibis-macro-bounce@xxxxxxxxxxxxx**] *On Behalf Of *jasleen kaur
> > *Sent:* Tuesday, September 13, 2011 12:53 AM
> > *To:* msteinb@xxxxxxxxxx
> > *Cc:* **ibis-macro@xxxxxxxxxxxxx**
> > *Subject:* [ibis-macro] Re: DFE related query****
> >
> > ** **
> >
> > Hi Mike,
> > Thanks for detailed response.
> > I still have doubts on DFE implementation in Rx getwave.
> >
> > Should I be giving waveform as i/p to DFE filter or should I downsample
> the
> > waveform to get symbols and then pass them as i/ps to DFE
> >
> > Thanks
> >
> > Jasleen Kaur
> >
> >
> >
> > ****
> >
>
>
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