Method and apparatus for routing differential signals across...

Details Method and apparatus for routing differential signals across... Method and apparatus for routing differential signals across...

2006-11-21

2006-11-21

Do, Thuan (Department: 2825)

Computer-aided design and analysis of circuits and semiconductor

Nanotechnology related integrated circuit design

C716S030000, C716S030000, C716S030000, C716S030000, C257S776000, C365S069000

Reexamination Certificate

active

07139993

ABSTRACT:
One embodiment of the present invention provides an arrangement of differential pairs of wires that carry differential signals across a semiconductor chip. In this arrangement, differential pairs of wires are organized within a set of parallel tracks on the semiconductor chip. Furthermore, differential pairs of wires are organized to be non-adjacent within the tracks. This means that each true wire is separated from its corresponding complement wire by at least one intervening wire in the set of parallel tracks, thereby reducing coupling capacitance between corresponding true and complement wires. Moreover, this arrangement may include one or more twisting structures, wherein a twisting structure twists a differential pair of wires so that the corresponding true and complement wires are interchanged within the set of parallel tracks.

REFERENCES:
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patent: 5485419 (1996-01-01), Campbell
patent: 5534732 (1996-07-01), DeBrosse et al.
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patent: 6034879 (2000-03-01), Min et al.
patent: 6043562 (2000-03-01), Keeth
patent: 6163475 (2000-12-01), Proebsting
patent: 6259621 (2001-07-01), Li et al.

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