[SI-LIST] Re: Board via characteristics (fwd)
- From: "Clewell, Craig" <cclewell@xxxxxxxxxxxxxx>
- To: "'Aubrey_Sparkman@xxxxxxxx'" <Aubrey_Sparkman@xxxxxxxx>,dhoovy@xxxxxxxxxxxxx, si-list@xxxxxxxxxxxxx
- Date: Thu, 9 May 2002 16:31:02 -0400
I agree, but not with the part about being wrong before :>).."kidding".
I think I recall Dan Swanson voiced his expert opinion on this topic a few
months to a year ago. I didn't check the archives but there may be
something still in there covering this very subject.
Craig Clewell
Sr. Signal Integrity Engineer
FCI Electronics
825 Old Trail Road
Etters, PA. 17319
ph: 717-938-7486
fax: 717-938-7224
e-mail: cclewell@xxxxxxxxxxxxxx
-----Original Message-----
From: Aubrey_Sparkman@xxxxxxxx [mailto:Aubrey_Sparkman@xxxxxxxx]
Sent: Thursday, May 09, 2002 4:21 PM
To: dhoovy@xxxxxxxxxxxxx; si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Board via characteristics (fwd)
I have heard this claim before but not bothered to check it out. Why? From
a conceptual or theoretical perspective it seemed inappropriate. Don't most
2D Field Solvers assume they are given the 2D cross-section of a structure
which is long with respect to the analysis frequency? How do you take an
appropriate 2D cross-section of a via? Seems to me a via is very much a 3D
structure. But I've been wrong before. :-)
Aubrey Sparkman
Signal Integrity
Aubrey_Sparkman@xxxxxxxx
(512) 723-3592
> -----Original Message-----
> From: David Hoover [mailto:dhoovy@xxxxxxxxxxxxx]
> Sent: Thursday, May 09, 2002 2:50 PM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Board via characteristics (fwd)
>
>
>
>
> Gang,
>
> I was asked if I could forward this
> question to the list for input. I'm a
> fabricator that builds high speed PCBs
> out of many different composites. I'm
> also very curious about modeling vias
> because I co-chair the IPC committee
> on Controlled Impedance Circuit Boards and
> High Speed Logic Design and during the last couple of
> Conference Meetings this topic has
> came up. I run a 2D Field Solver which I
> believe can model for vias. Just never have
> done it.
>
> Any and all response would be greatly
> appreciated.
>
> David Hoover
> Field Application Engineer
> Data Circuit Systems, Inc.
> (408) 280-0422 X233
> http://www.datacircuits.com
>
>
>
> -------- Forwarded message --------
> Date: Thu, 9 May 2002 15:14:30 -0400
> From: dhoovy@xxxxxxxxxxxxx
> Subject: Board via characteristics
>
> Dave:
>
> For Spice modeling purposes, we need the equivalent inductance and AC
> resistance ( at 0.5 Ghz - 1.0 Ghz ) of a board via,
>
> length = 0.062 inches and diameter = 0.006 inches, no other parasitic
> effects needed at this time.
>
>
> Regards,
>
> Bob
>
> ------------------------------------------------------------------
> 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 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
>
>
>
------------------------------------------------------------------
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 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
------------------------------------------------------------------
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 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:
