[SI-LIST] Re: optimal tline impedance
- From: Zheng Edison <edisonzheng@xxxxxxxx>
- To: <sherman.chen@xxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Mon, 26 Jan 2015 12:57:47 +0800
If the characteristic impedance is, for example,70ohm,there is no reason to
design a 100ohm transmission line.You can do a simulation running through the
whole link,including all the discontinuities,maybe,you can decide what the best
value is.
--- Original Message ---
From: "Chen, Sherman" <sherman.chen@xxxxxxx>
Sent: January 26, 2015 9:37 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] optimal tline impedance
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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