Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Reexamination Certificate
2004-04-23
2010-02-23
Pham, Brenda (Department: 2464)
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
C370S532000
Reexamination Certificate
active
07668210
ABSTRACT:
A method and apparatus are provided for reducing current demand variations in large fanout trees. The fanout tree is split into at least 2 sub-groups, each preferably with substantially equal parasitic capacitance. Data is then scrambled according to a scrambling sequence function to provide scrambled data having a constant number of bits that are toggled with respect to time, such as when observed in pairs of sub-groups. Functionally, an apparatus according to an embodiment of the present invention includes 3 blocks: a scrambler, egress logic, and a de-scrambler. The egress logic is simply a block of storage that can reorder the bytes received from the scrambler. The de-scrambler de-scrambles the retransmitted data based on the scrambling sequence function. Embodiments of the present invention can be applied to any system where data must fanout from a single source to many destinations, such as switches.
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Mok Winston Ki-Cheong
Muma Scott A.
Rolheiser Nicholas W.
Borden Ladner Gervais LLP
Chakrapani Mukundan
Pham Brenda
PMC-Sierra Inc.
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