[SI-LIST] Source impedance?
- From: David Kaiser <david.kaiser@xxxxxxxxxx>
- To: "'si-list@xxxxxxxxxxxxx'" <si-list@xxxxxxxxxxxxx>
- Date: Tue, 8 Jan 2002 15:38:40 -0700
Theory question. Assume perfect world with no parasitics.
If a 50 Ohm trace on a board is terminated with a 50 Ohm resistor at the end
of the trace, is there any advantage in terms of SI
to driving the trace with a source that has 50 Ohm output impedance compared
to a source with 10 or 20 Ohms of output impedance?
It seems to me that the only thing the series source impedance would do to a
50 Ohm line that is terminated with a 50 Ohm resistive load would be to
divide the amplitude in half without improving the signal integrity.
Correct?
David
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