[SI-LIST] : Power Noise

Jon Keeble (j.keeble@fairlightesp.com.au)
Thu, 18 Mar 1999 10:08:06 +1000

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>Now, if the highest inductance part of the path is the pad/via, would =
that
>favor running (wide) traces from the cap directly to the device, since =
that
>eliminates two vias between the cap and the device? A wide, short path =
only
>has a few nH inductance (I think).

Hi Doug

There's no argument that minimising the length, and maximising the =
width, of the connection from C to planes minimises the inductance. Same =
goes for connecting component pads to planes. Both are important.

Between connections on a plane there is really a very low impedance.

The C between planes can be a very useful component as well, if they =
placed close together.