[SI-LIST] : A basic question
From: Peterson, James F (FL51) ([email protected])
Date: Fri Mar 17 2000 - 05:00:49 PST
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SI List:
I have a question about the relationship between Z and Pd (prop. delay). The
equations used for these two are :
Z=(L/C)^(1/2)
and
Pd=(LC)^(1/2)
I guess my question has to do with Pd. How can we equate Pd to both the
above equation and the fact that the speed of light is C/((er)1/2)? Which
says that prop. delay is just a function of the dielectric constant (or the
material that light is propagating through).
Can I really reduce C, without increasing L, and thus reduce the Pd of an
interconnect? If I can't then the Pd=(LC)^(1/2) has problems. If I can then
how does it align with light's speed being just a function of the medium
it's traveling through?
regards,
Jim
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