[SI-LIST] Re: Differential Signals
- From: <vince_cavanna@xxxxxxxxxxx>
- To: <sinnovate88@xxxxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Wed, 15 Sep 2004 15:20:43 -0600
Hi Shekhar,
Because the loop area formed by the circuit that the differential =
current has to flow around is typically much smaller than the loop area =
formed by the circuit that the common mode current has to flow around. =
Thus you have a less efficient radiator. Why is the loop area smaller? =
Because the current path for the differential circuit consists of both =
signal conductors (most of the current that flows through one signal =
conductor returns through the other) why are typically tightly coupled, =
whereas the path for the common-mode circuit consists of the signal =
conductor pair and the return path which may be the cable shield or =
maybe even earth ground!
Vince
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx
> [mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of shekhar sharma
> Sent: Tuesday, September 07, 2004 8:06 AM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Differential Signals
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> Hello,
> one very basic question: Why differential
> signaling has lower EM Radiation ???
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> Thanking you in advance
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> Shekhar
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