[SI-LIST] Re: 0306 Capacitors
- From: "Istvan NOVAK" <istvan.novak@xxxxxxxxxxxxxxxx>
- To: <weirsp@xxxxxxxxxx>
- Date: Sat, 13 Mar 2004 21:12:07 -0500
Steve,
Assuming a square pad and a circular via in its center:
if we increase the diameter of the via, dont we have
a shorter distance from the edge of the pad to the via tube?
Regards,
Istvan
----- Original Message -----
From: "steve weir" <weirsp@xxxxxxxxxx>
To: "Istvan NOVAK" <istvan.novak@xxxxxxxxxxxxxxxx>
Cc: <si-list@xxxxxxxxxxxxx>
Sent: Saturday, March 13, 2004 5:34 PM
Subject: [SI-LIST] Re: 0306 Capacitors
> Sure, looking from the connecting edge of the via pad to the center where
> it meets the top of the tube, the inductance increases with the OD. It is
> a pretty straightforward application of Biot-Savart.
>
> Regards,
>
>
> Steve.
> At 11:24 AM 3/13/2004 -0500, Istvan NOVAK wrote:
> >Steve,
> >
> >I am not sure I agree with your following statement in the context we
have
> >here
> >(connecting component pads to planes). Can you elaborate?
> >
> >
> > > 1) A larger via radius increases the partial inductance on the surface
by
> > > ln( radius ).
> > >
> >
> >Regards,
> >Istvan
>
>
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