[SI-LIST] Re: optimal tline impedance
- From: Long Yang <long.0.yang@xxxxxxxxx>
- To: scott@xxxxxxxxxxxxx
- Date: Mon, 26 Jan 2015 11:05:41 +0800
Assuming you have a target impedance and your channel contains a lot of
variables, including vias, different transmission lines, connectors (and
you also may need consider the variation) DOE (Design of experiment) can be
used to find an optimal combination.
I believe there should be some more simpler method by my gut feeling, but I
have not found it yet.:(
On Mon, Jan 26, 2015 at 10:05 AM, Scott McMorrow <scott@xxxxxxxxxxxxx>
wrote:
> The answer to your question is ... yes. A statistical channel simulation
> will help to show where the channel impedance will be centered.
> On Jan 25, 2015 8:40 PM, "Chen, Sherman" <sherman.chen@xxxxxxx> wrote:
> > Hi,
> > This idea may incur some controversial. Hope it's worthwhile.
> > It's like this:
> > In channel design, the optimal tline impedance actually depends on the
> > fixed impedances of TX, RX, and connector, etc. Through optimization you
> > can locate the best impedance for the trace, and it's not necessarily
> 85Ohm
> > or 100Ohm. In this case, to explore every cent of the system performance
> > potential, should we jump out of the frame of 85Ohm/100Ohm and choose to
> > use other values?
> >
> > Best Regards,
> >
> > Sherman Chen
> > Signal Integrity
> > EMC Global Hardware Engineering
> > Tel: +86 21 60951100-3329
> >
> >
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