[SI-LIST] Re: PDS target Impedance (adaptive method)
- From: Inmyoung Song <imsong91@xxxxxxxxx>
- To: "Lakshmi Narayanan Sowrirajan, TLS-Chennai" <lakshminarayanans@xxxxxx>
- Date: Fri, 20 Feb 2009 16:08:04 +0900
If I want to get the target impedance based on frequency, I do simulation
with ibis model.
Every spice simulator can show the current result during operating, so we
can get the target impedance.
Many engineers have a rule of thumb where all data bits operate
simultaneously or randomly.
Good luck!
2009/2/13 Lakshmi Narayanan Sowrirajan, TLS-Chennai <
lakshminarayanans@xxxxxx>
> Hi,
>
>
>
> I am working in PDS analysis. Can you please explain me on
> fixing the target impedance of the power distribution network?
>
> The general formula gives
>
>
>
> Z (target) = (Supply Voltage * Ripple Tolerance) / Dynamic
> current
>
>
>
> This formula is not considering the frequency effect as over some
> frequency the target impedance can be varying (going high). How to
> account for this in the analysis?
>
>
>
> Thanks & Regards
>
> Lakshminarayanan.S
>
> 9840250902
>
>
>
>
>
> DISCLAIMER:
>
> -----------------------------------------------------------------------------------------------------------------------
>
> The contents of this e-mail and any attachment(s) are confidential and
> intended for the named recipient(s) only.
> It shall not attach any liability on the originator or HCL or its
> affiliates. Any views or opinions presented in
> this email are solely those of the author and may not necessarily reflect
> the opinions of HCL or its affiliates.
> Any form of reproduction, dissemination, copying, disclosure, modification,
> distribution and / or publication of
> this message without the prior written consent of the author of this e-mail
> is strictly prohibited. If you have
> received this email in error please delete it and notify the sender
> immediately. Before opening any mail and
> attachments please check them for viruses and defect.
>
>
> -----------------------------------------------------------------------------------------------------------------------
>
> ------------------------------------------------------------------
> 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
> or at our remote archives:
> http://groups.yahoo.com/group/si-list/messages
> Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
>
>
>
--
Signal Integrity Engineer
South Korea
------------------------------------------------------------------
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
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
