[SI-LIST] Re: Crosstalk due to package
- From: steve weir <weirsi@xxxxxxxxxx>
- To: Ravinder.Ajmani@xxxxxxxxxxxxxx
- Date: Fri, 02 Nov 2007 13:41:52 -0700
Ravinder, with sufficiently fast edge rates it sure can.
Best Regards,
Steve.
Ravinder.Ajmani@xxxxxxxxxxxxxx wrote:
> Hi SI Experts,
> I was running crosstalk simulations in a design using Cadence Allegro PCB
> SI GXL, and observed very high crosstalk (about 100 mV). The Driver ASIC
> is in a 10 x 10 mm 64-pin TQFP package. A similar design using the
> previous version of the ASIC in same package had shown crosstalk of about
> 50 mV only. The signal slew rate has not changed significantly between
> the two ASIC versions. Only difference was that the package model for the
> older ASIC was a simple RLC model, whereas the ASIC vendor provided a
> coupled model for the new ASIC package. To confirm my doubt, I edited the
> package model to remove the coupling parameters, and the crosstalk dropped
> to 50 mV.
>
> I am curious if it is possible for a 10 x 10 mm TQFP package to introduce
> crosstalk to the tune of 50 mV.
>
> Regards, Ravinder
> Server PCB Development
> Hitachi Global Storage Technologies
>
>
> Email: Ravinder.Ajmani@xxxxxxxxxxxxxx
>
> ------------------------------------------------------------------
> 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
>
>
>
>
>
--
Steve Weir
Teraspeed Consulting Group LLC
121 North River Drive
Narragansett, RI 02882
California office
(408) 884-3985 Business
(707) 780-1951 Fax
Main office
(401) 284-1827 Business
(401) 284-1840 Fax
Oregon office
(503) 430-1065 Business
(503) 430-1285 Fax
http://www.teraspeed.com
This e-mail contains proprietary and confidential intellectual property of
Teraspeed Consulting Group LLC
------------------------------------------------------------------------------------------------------
Teraspeed(R) is the registered service mark of Teraspeed Consulting Group LLC
------------------------------------------------------------------
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:
