Signal transmission apparatus
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United States of America Patent
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-
May 7, 2013
Grant Date -
Feb 3, 2011
app pub date -
Nov 17, 2009
filing date -
Jul 30, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A signal transmission apparatus includes two circuit layers. First and second ground sheets each has a rectangular area are arranged in the two circuit layers respectively. A third ground sheet is arranged between the two circuit layers. A differential pair includes a transmission line arranged between the first and third ground sheets and a transmission line arranged between the second and third ground sheets. The first to third ground sheets have same electric potential. Projections of the two rectangular areas on a surface where the third ground sheet in only have one common border with the third ground sheet. The third ground sheet is formed by extending the common border along a signal transmission direction. The differential pair includes a number of section pairs each composed of two sections arranged in the two transmission lines symmetrically. Every two adjacent section pairs are equivalent to a capacitor and an inductor.
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