FreeLists / si-list / [SI-LIST] Re: source-termination and daisy chain question

["Barnes, Heidi" <heidi.barnes@xxxxxxxxxx>]

Hello Han,
Both Eric Bogatin www.bethesignal.com and Howard Johnson=20
www.sigcon.com have excellent books that cover this subject as well as =
their workshops.

Chapter 8 "Transmission Lines and Reflections" in Eric's book Signal =
Integrity Simplified and Chapter 6 "Terminations" in Howard's book =
High-Speed Digital Design should be very helpful for you.

As Terry Fox mentioned, this type of problem benefits greatly from =
running the simulations to see what works best for your specific =
application and board routing topology.

Good Luck,
Heidi Barnes
Americas Application Development Center
Semiconductor Test Solutions
Verigy



-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] =
On Behalf Of Han Li
Sent: Monday, July 02, 2007 11:26 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] source-termination and daisy chain question

Hi everyone,
   It seems a simple question,But I still have something i
cannot completly understand.
    A daisy chain  is often used in  multidrop topology,  which need an
end-termination. And, source-termination doesnot work properly in
daisy chain,because the device in the middle of the chain would get a
plateau;using source-termination, all load should be at the end of  the
line.
     So, in a design , i should figure out minimul distance between,
say two receivers. In other words, I should decide beyond what distance
between two
receivers , source-termination should not be used, and this topology
can be named a  daisy chain?
     Could anyone provide a deeper explanation?  Thanks a lot!
----                      ------                         -------
Driver---------revceiver_1-----------------------receiver_2
----                      -------                        --------
                            |-------------distance---------|


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