[SI-LIST] Series termination greater than the characteristic impedance?
- From: <aminotg@xxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Tue, 17 Jan 2006 9:13:05 -0600
Hi All,
I was wondering if there is ever a case where a series termination should be
higher than the characteristic impedance of a trace?
We had an SI analisys performed on our DDR2 interface and the conclusion was to
change the series terminations of our data bus to 60ohms. The characteristic
impedance of the traces on our board is 50ohms.
I always thought that a series termination was added to match the driver to the
characteristic impedance of the trace, now I am confused, because the analysis
on our board doesn't agree with this thinking.
Kindest Regards,
Gilles
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