Re: [SI-LIST] : RE: [SI-LIST]: Long bus or star?

Shayle Hirschman (shayle@mho.net)
Thu, 01 Apr 1999 13:14:50 -0600

John Grebenkemper writes:

"....Note that it is difficult to get incident wave switching for
N>5....."

If the loads at the end of each leg of the star are considered lumped,
which they should be if the star legs are short enough, and with series
source termination for each leg at the junction, then isn't the intent
<underline>not</underline> to use incident wave switching?

And further writes:

"The star may also work better in configurations in which any receiver
can become the driver since each driver now sees a more identical
load."

With receivers becoming drivers, the termination isn't series source. Can
this work, or does it work because 2 stub lengths from each driver to
each receiver is still short enough such that reflections occur while the
signal is still transitioning, thereby preventing overshoot?

Shayle

*************************************************************

Shayle I. Hirschman, Senior Engineer

Managing Director

Digital Design Solutions

http://www.digital-designs.com

shayle@mho.net

Phone 901/759-1802 Fax 901/759-2324

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