[SI-LIST] Re: Weighting functions for weakly non-linear drivers
- From: Russell Dill <Russ.Dill@xxxxxxx>
- To: "Muranyi, Arpad" <Arpad_Muranyi@xxxxxxxxxx>
- Date: Thu, 19 May 2011 08:43:01 -0700
On Thu, May 19, 2011 at 6:39 AM, Muranyi, Arpad
<Arpad_Muranyi@xxxxxxxxxx> wrote:
> Those slides do not mention the clamps because they are
> always ON (as shown on slide 4 in the same presentation).
> Since they are always ON, they do not need to be switched
> on and off, therefore whatever is in the clamp tables is
> just added to the currents calculated on slides 5, 6, 8
> with a simple parallel PWL source for each clamp table.
> This applies to clamps which are only active outside the
> normal signaling region (above power or below GND) as
> well as clamps which include on-die termination currents,
> such as a pullup resistor to the power rail, which is
> within the normal signaling range.
By "added to", do you mean like the equations on slide 4:
www.vhdl.org/pub/ibis/summits/mar06/muranyi1.pdf
0 = kpu(t) ⋅ IVpu(Vwfm1(t)) + IVpc(Vwfm1(t)) − kpd(t) ⋅ IVpd(Vwfm1(t))
− IVgc(Vwfm1(t)) − Iout(Vwfm1(t))
0 = kpu(t) ⋅ IVpu(Vwfm2(t)) + IVpc(Vwfm2(t)) − kpd(t) ⋅ IVpd(Vwfm2(t))
− IVgc(Vwfm2(t)) − Iout(Vwfm2(t))
> Arpad
> ==========================================================
>
>
> -----Original Message-----
> From: Russell Dill [mailto:Russ.Dill@xxxxxxx]
> Sent: Thursday, May 19, 2011 2:36 AM
> To: Muranyi, Arpad
> Cc: si-list@xxxxxxxxxxxxx
> Subject: Re: [SI-LIST] Re: Weighting functions for weakly non-linear drivers
>
> On Thu, May 5, 2011 at 9:59 PM, Muranyi, Arpad <Arpad_Muranyi@xxxxxxxxxx>
> wrote:
>> Russell,
>>
>> Slides 5, 6, 8 of my presentation might help you in understanding
>> the way those weighting functions can be calculated:
>>
>> http://www.eda.org/ibis/summits/jun03b/muranyi1.pdf
>>
>
> I've noticed that the model in the presentation doesn't include
> contributions from ground clamps or power clamps. If the waveform goes
> beyond the rail when switching, is it necessary to include these
> contributions?
> ------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
> or to administer your membership from a web page, go to:
> //www.freelists.org/webpage/si-list
>
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
>
> List technical documents are available at:
> http://www.si-list.net
>
> List archives are viewable at:
> //www.freelists.org/archives/si-list
>
> Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
>
>
>
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List technical documents are available at:
http://www.si-list.net
List archives are viewable at:
//www.freelists.org/archives/si-list
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
