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

[Terry Fox <tfox@xxxxxxxxx>]

Han,

I promised you some simulations on this 
topic.  http://www.siemc.com/SI_List.htm

Scroll down to topic #2

I ran some simulations showing the difference in wave form between a source 
serial termination and a load termination.  Hope this helps..TFox

At 11:25 PM 7/2/2007, Han Li wrote:

>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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