[SI-LIST] 答复: [SI-LIST] Crosstalk and Overshoot/Undershoot
- From: "Shao, Peng" <Peng_Shao@xxxxxxxxxx>
- To: Newbie Pugal <pugal8686@xxxxxxxx>, "si-list@xxxxxxxxxxxxx" <si-list@xxxxxxxxxxxxx>
- Date: Thu, 30 Jun 2011 14:05:31 +0000
Well, Pugal, one thing should be clear.
Nobody says that " the values of far end crosstalk will be negative and near
end cross talk will be positive."
The polarity of FEXT and NEXT depends on what kind of signal switching on the
aggressor.
If there is a POSITIVE switching(rising edge) on aggressor, you will see " the
values of far end crosstalk will be negative and near end cross talk will be
positive."
But if it is a falling edge on aggressor, things will be reversed.
Shaopeng
AE Consultant Mentor Graphics Electronic Technology Co., Ltd.
Tel: +86-10 - 5930 4050
Cell: +86-136 1105 7707
Fax: +86-10-6808 0319
E-mail: peng_shao@xxxxxxxxxx
Address: RM1512, CanWay Building, No.66 NanLiShi Lu, Beijing, China 100045
-----邮件原件-----
发件人: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] 代表
Newbie Pugal
发送时间: 2011年6月30日 12:13
收件人: si-list@xxxxxxxxxxxxx
主题: [SI-LIST] Crosstalk and Overshoot/Undershoot
Hi,
The crosstalk theory says that the values of far end crosstalk will be
negative and near end cross talk will be positive.
If that is the case, does the negative far end crosstalk on the victim line
leads to any undershoot problems? or it just reduces the noise margin levels in
the victim lines?
When to worry about overshoot and undershoot problems due to crosstalk?
Thanks
Pugal
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