FreeLists / si-list / [SI-LIST] Re: Differential Signals

["Ahmed El-Sanhoury" <rd-ahsanh@xxxxxxxxxxxxxx>]

Dear Shekhar:
Answer:=20
1) Any wire carries Current, radiate by current elements along this =
wire.
2)This radiation has a value which depends on several parameters =
(Current Element Amplitude,                                              =
       Frequency,media,etc..), and has a direction which depends on the =
Current Element direction.
3)In case of differential signals, each current element on the first =
wire has the same magnitude and opposite      direction with respect to =
the corresponding current element on the second wire.
4)So Idealy if these differential signals route very closely near each =
other,and the common mode current is zero    the effect of radiation on =
the surrounding by the previous two current elements will be minimal due =
to opposite sign with same amplitude.

Thanks
A.Sanhoury

> ----------
> From:         si-list-bounce@xxxxxxxxxxxxx[SMTP:si-list-bounce@xxxxxxxxxxxxx] 
> =
on behalf of shekhar sharma[SMTP:sinnovate88@xxxxxxxxxxx]
> Reply To:     sinnovate88@xxxxxxxxxxx
> Sent:         Tuesday, September 07, 2004 6:05 PM
> To:   si-list@xxxxxxxxxxxxx
> Subject:      [SI-LIST] Differential Signals
>=20
>=20
> Hello,
>        one very basic question: Why differential
> signaling has lower EM Radiation ???
>=20
> Thanking you in advance
>=20
> Shekhar
>=20
> =
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