Error detection/correction and fault detection/recovery – Pulse or data error handling – Skew detection correction
Reexamination Certificate
2005-05-24
2005-05-24
Lamarre, Guy J. (Department: 2133)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Skew detection correction
C714S798000, C341S120000
Reexamination Certificate
active
06898742
ABSTRACT:
A method and system performs automatic deskew tuning and alignment across high-speed, parallel interconnections in a high performance digital system to compensate for inter-bit skew. Rather than using a VDL, digital elements such as registers and multiplexers are used for performing the automatic deskew tuning and alignment procedure. The result is a simpler, more robust deskew system capable of operating over a wider range of input values with greater accuracy and over a broader range of temperatures. In addition, the method and apparatus performs a one to four unfolding of the signal on each interconnection. The system includes a deskew controller and a plurality of deskew subsystems. The deskew controller automatically computes the amount of delay needed to correct the skew on each interconnection and feeds a different (or appropriate) delay value to each deskew subsystem located at the receiving end of each interconnection.
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Koyanagi Yoichi
Sastry Raghu
Schober, Jr. Richard L.
Tamura Hirotaka
Fenwick & West LLP
Fujitsu Limited
Lamarre Guy J.
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