From: Boris Yost ([email protected])
Date: Wed Sep 13 2000 - 11:58:55 PDT
Dear list members:
I'm looking at a design right now--portions of which were inspired by an
"EMI expert". Specifically, instead of ordinary decoupling practice, there
are filters with a capacitor on each side of a ferrite
bead...individually...for each and every device on the board. Almost all of
the devices have "CMOS" outputs--the output goes to the high rail. Almost
all of the devices are fully static logic. The system is a digital video
display, it has one input, and the board output doesn't leave the box. 80%
of the board, and everything doing real work, operates synchronously to the
input clock.
Is this "decoupling" scheme overkill, useful, or a disaster waiting to
happen?
Best regards,
Boris Yost
P.S. Order ferrite beads! Now! They will soon be on-allocation!
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