**From:** Sainath Nimmagadda (*sainath@lsil.com*)

**Date:** Tue Mar 20 2001 - 17:43:36 PST

**Next message:**SHRIPADARAJ AD: "Re: Re: [SI-LIST] : Jitter measurement"**Previous message:**David Bengtson: "Re: [SI-LIST] : Jitter measurement"**In reply to:**JuYoung Lee: "Re: [SI-LIST] : Re: approximations for partial self inductance - WHY"

Dear JuYoung,

JuYoung Lee wrote:

*> Michael,
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*>
*

*> Good point.
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*>
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*> In Physics community, people often say about gauge attached to vector
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*> potential A. A is defined by curl A = B. You can attach any gradiant
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*> of function X (gauge) to A without affecting E and B field according
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*> to Maxwell equation form. So A' = A + gradient X and there are
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*> infinitely many options of A'.
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*>
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*> One interpretation is that A' is partial inductance per unit length.
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Checking dimensions: in curl A = B, A has the units of webers/m or

Volt-Sec/m. From above interpretation, A' has units of Henry/m or

Volt-Sec/Amp/m. Am I missing something here?

Thanks,

Sainath

*>
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*>
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*> Field solvers often use A'. As long as one sticks to a particular
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*> choice of X consistently, the potential error in using partial
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*> inductance can be avoided.
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*>
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*> And X is supposed to mean "nonexistence" in electromagnetics. In
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*> quantum physcis it means something related to phase of photon.
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*>
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*> Regards,
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*> JuYoung
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**Next message:**SHRIPADARAJ AD: "Re: Re: [SI-LIST] : Jitter measurement"**Previous message:**David Bengtson: "Re: [SI-LIST] : Jitter measurement"**In reply to:**JuYoung Lee: "Re: [SI-LIST] : Re: approximations for partial self inductance - WHY"

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