[SI-LIST] Re: Doug Brooks's Question
- From: steve weir <weirsp@xxxxxxxxxx>
- To: intrinsi@xxxxxxxxx, si-list@xxxxxxxxxxxxx
- Date: Sat, 15 Nov 2003 12:12:47 -0800
Sainath, trying to combine just the end LC with the termination R ignores
the effects of the upstream networks and yields the wrong behavior.
Regards,
Steve.
At 09:54 AM 11/15/2003 -0800, Sainath Nimmagadda wrote:
>I understand the responses(using different tracks) to Doug's
>question- but don't know why his track is wrong altogether. Someone,
>please explain why and where his approach doesn't work.
>
>Thanks,
>Sainath
>
>[ from Archives]
>==========================================================
>From: Doug Brooks [mailto:doug@xxxxxxxxxx]
>Sent: Wednesday, November 12, 2003 4:43 PM
>To: si-list@xxxxxxxxxxxxx
>Subject: [SI-LIST] Transmission line match
>
>I am trying to develop a *qualitative* (NOT quantitative) explanation of
>what happens at the terminating end of a transmission line. I think I am on
>the track with this model and discussion:
>1. The transmission line model is a lumped model of a string of Ls and Cs.
>2. The termination value forms a time constant with these. That is, if
>R=Z=(L/C)^.5, then RC=L/R. That is, when correctly terminated, the time
>constants are matched.
>3. If the terminating resistance is high, then the RC time constant is
>relatively longer. If it is low, then the L/R time constant is relatively
>longer.
>
>At this point I am having trouble getting over the "so what?" and
>completing the argument. What is the next step in this argument..... or am
>I on the wrong track altogether?
>
>Thanks
>Doug Brooks
>=======================================================
>
>
>
>---------------------------------
>Do you Yahoo!?
>Protect your identity with Yahoo! Mail AddressGuard
>
>------------------------------------------------------------------
>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.org
>
>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 technical documents are available at:
http:/www.si-list.org
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:
