[SI-LIST] Re: Trace impedance
- From: Doug Brooks <doug@xxxxxxxxxx>
- To: sinnovate88@xxxxxxxxxxx, si-list@xxxxxxxxxxxxx
- Date: Tue, 21 Nov 2006 09:40:22 -0800
Actually, the answer is no.
Zdiff = 2*Zo(1 - k)
Zcommon = .5 * Zo(1 + k)
where k is a factor related to the coupling between the traces (and
whose limits are between 0 and 1.0).
Single-ended impedance and common mode impedance of a differential
pair have different meanings.
Doug Brooks
At 06:48 AM 11/21/2006, you wrote:
>Hello All,
> One basic question on differential pair trace
> impedance. Is it possible that a differential pair with 100 ohm
> differential impedance will have 50 ohm common mode impedance? Are
> the single-ended and common mode impedances of a differential pair
> has the same meaning?
>Thanks and advance,
>shekh
>
>
>
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