Hi Darrel,

I must admit I have only quickly glanced over the article. One thing that puzzles me a bit is how the diode arrangement actually works to dampen the reflections on the buss.

I have a bit of a background in RF and I always assumed the terminating resistor was selected to be approx the same impedance as the line. This is transmission line theory and, in this instance, the termination resistance equals the characteristic impedance of the transmission line, and therefore the line operates with low reflections or SWR (Standing Wave Ratio). I would like to understand more on how the diodes produce the same effect without the terminating resistor. However it works it sure seems to be better arrangement.

Andy