Coded data generation or conversion – Digital code to digital code converters – To or from minimum d.c. level codes
Reexamination Certificate
2006-08-29
2006-08-29
Jeanglaude, Jean Bruner (Department: 2819)
Coded data generation or conversion
Digital code to digital code converters
To or from minimum d.c. level codes
C341S095000
Reexamination Certificate
active
07098817
ABSTRACT:
Methods and apparatus for spreading and concentrating information to constant-weight encode data words on a parallel data line bus while allowing communication of information across sub-word paths. In one embodiment, data transfer rates previously obtained only with differential architectures are achieved by only a small increase in line count above single ended architectures. For example, an 18-bit data word requires 22 encoded data lines for transmission, where previously, 16 and 32 lines would be required to transmit un-coded data with single-ended and differential architectures respectively. Constant-weight parallel encoding maintains constant current in the parallel-encoded data lines and the high and low potential driver circuits for the signal lines.
REFERENCES:
patent: 4371928 (1983-02-01), Barlow et al.
patent: 4573034 (1986-02-01), Schouhamer Immink
patent: 5097261 (1992-03-01), Langdon et al.
patent: 5381425 (1995-01-01), Bitzer et al.
patent: 5504774 (1996-04-01), Takai et al.
patent: 5608760 (1997-03-01), Sandri et al.
patent: 5712806 (1998-01-01), Hennenhoefer et al.
patent: 5714904 (1998-02-01), Jeong
patent: 5910969 (1999-06-01), Sayiner et al.
patent: 5917438 (1999-06-01), Ando
patent: 5938773 (1999-08-01), Hauck et al.
patent: 6094381 (2000-07-01), Isa
patent: 6256722 (2001-07-01), Acton et al.
patent: 6265994 (2001-07-01), Kahlman
patent: 2160392 (1985-12-01), None
Youngsoo Shin, Soo-Ik Chae, and Kiyoung Choi, Partial Bus-Invert Coding for Power Optimization of System Level Bus, School of Electric Engineering, Seoul National University, Seoul 151-742, Korea, 1998, pp. 127-129.
J. Pieter M. Schalkwuk, An Algorithm for Source Coding, IEEE Transactions on Information Theory, vol. IT-18, No. 3, May 1972, pp. 395-399.
Mircea R. Stan and Wayne P. Burleson, Bus Invert Coding for Low-Power I/O, IEEE transaction on VLSI systems, vol. 3, No. 1 Mar. 1995, pp. 49 and 50.
Kazuyuki Nakamura and Mard A. Horowitz, A 50% Noise Reduction Interface Using Low- Weight Coding, NEC corporation, Shimokuzawa, Sagamihara, Kanagawa 229, Japan, Center for Integrated Systems, Stanford University, Stanford, CA 94305, pp. 144 and 145.
Luca G. Tallini and Bella Bose, Balanced Codes woth Parallel Encoding and Decoding, IEEE Transaction on Computers, vol. 48, No. 8, Aug. 1999, pp. 794-814.
Luca G. Tallini and Bella Bose, Design of Balanced and Constant Weight Codes for VLSI Systems, IEEE Transaction on Computers, vol. 47, No. 5, May 1998.
Jeffrey F. Tabor, Noice Reduction Using Low-Weight and Constant Weight Coding Techniques, Massachusetts Institute of Technology, Aug. 10, 1990.
Athas William C.
Cornelius William P.
Apple Computer Inc.
Jeanglaude Jean Bruner
LandOfFree
Methods and apparatus for constant-weight encoding and decoding does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods and apparatus for constant-weight encoding and decoding, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus for constant-weight encoding and decoding will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3714691