source termination allows the signal to reflect off the load and
> travel back to the source, where is absorbed by series termination. > > >
And I will bet his analysis was done with sine wave reflections not a
rising edge of a pulse. Try a simple experiment, pick a design you
already have on the bench, replace the resistor with 10 ohms then replace
it with 50, Get a high speed scope and measure the leading edges.
If you apply his theory you are playing games with bouncing spikes back and
forth.. which .equals a very noisy board. The name of the game is to keep
the spikes from being generated in the first place not spike management.
I guess you could do spike management but I prefer the first method. Try
the bench test and look at the edge. I had a very good rf engineer
explain then he showed me.
Mike Reagan
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