[SI-LIST] Re: TDR & Impedance rise in lossy interconnects
- From: Istvan Novak <istvan.novak@xxxxxxxxxxx>
- To: bbakshan@xxxxxxxxx, "si-list@xxxxxxxxxxxxx" <si-list@xxxxxxxxxxxxx>
- Date: Sat, 23 May 2015 19:54:48 -0400
Hello Boris,
As others pointed out, it is not an artifact; it happens on all lossy
interconnects.
For an explanation, you may find our paper from a recent DesignCon useful:
http://www.electrical-integrity.com/Paper_download_files/DC13_Determining_PCB_Trace_Impedance.pdf
Regards,
Istvan Novak
Oracle
On 5/23/2015 4:43 PM, Boris Bakshan wrote:
Hello,
When running a TDR measurement on a lossy channel such as long backplane I
always see a positive drift of the impedance along the interconnect.
Is it just an artifact or should it account for physical property of the
material?
What's the physical explanation behind this?
Thanks,
Boris.
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