[SI-LIST] Re: Trace impedance

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
>
>
>
>__________________________________________________________
>Yahoo! India Answers: Share what you know. Learn something new
>http://in.answers.yahoo.com/
>------------------------------------------------------------------
>To unsubscribe from si-list:
>si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
>or to administer your membership from a web page, go to:
>http://www.freelists.org/webpage/si-list
>
>For help:
>si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
>List FAQ wiki page is located at:
>                 http://si-list.org/wiki/wiki.pl?Si-List_FAQ
>
>List technical documents are available at:
>                 http://www.si-list.org
>
>List archives are viewable at:
>                 http://www.freelists.org/archives/si-list
>or at our remote archives:
>                 http://groups.yahoo.com/group/si-list/messages
>Old (prior to June 6, 2001) list archives are viewable at:
>                 http://www.qsl.net/wb6tpu
>

____________________________________________________________________________-
Check out UltraCAD's differential impedance and skin effect 
calculators at http://www.ultracad.com 

------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field

or to administer your membership from a web page, go to:
http://www.freelists.org/webpage/si-list

For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field

List FAQ wiki page is located at:
                http://si-list.org/wiki/wiki.pl?Si-List_FAQ

List technical documents are available at:
                http://www.si-list.org

List archives are viewable at:     
                http://www.freelists.org/archives/si-list
or at our remote archives:
                http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
                http://www.qsl.net/wb6tpu

Other related posts: