[SI-LIST] Re: Differential Signals
- From: "Ahmed El-Sanhoury" <rd-ahsanh@xxxxxxxxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>, <sinnovate88@xxxxxxxxxxx>
- Date: Wed, 8 Sep 2004 16:10:28 +0300
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]
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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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