From: Dill, Franz @ Celerity (@)
Date: Wed Dec 06 2000 - 17:31:56 PST
A fellow co-worker mentioned: with buried capacitance the location of bypass
capacitors (for that buried capacitance plane) does not matter (i.e. an IC's
bypass cap. could be 6 inches away). Is this true?
At relatively low frequencies (say 5MHz) you cannot consider buried
capacitance an AC short which would be required in allowing you to deem its
impedence negligable. With a non-negligable BC impedence bypass caps cannot
be as effective, say 6 inches away, from the IC. I forsee the potential of
a low frequecy noise being injected on a power supply in such a bypassing
configuration. Am I mistaken?
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