[SI-LIST] : Islands of Power

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From: Keith Amundsen (kamundsen@cportcorp.com)
Date: Fri Mar 03 2000 - 06:49:01 PST


We have been looking at creative power plane connections. For subsystems on
a board (of one or more chips) we are considering isolating the power plane
under each of them. This would be done with a narrow moat between the
rectangular island and the rest of the power plane. The moat would be
bridged with ferrites. The island would have a bulk storage (10 or 33uF)
for each ferrite and a number of bypass (multiple values) capacitors for
each chip. These would be connected to the solid ground plane. Their are
many pros and cons to doing this and we thought a wider audience might help.
Comments?
Thanks & Regards, Keith

-----Original Message-----
Subject: RE: [SI-LIST] : Adding inductors to ground?

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