Static information storage and retrieval – Associative memories – Ferroelectric cell
Reexamination Certificate
2005-04-12
2005-04-12
Hoang, Huan (Department: 2818)
Static information storage and retrieval
Associative memories
Ferroelectric cell
C365S189070, C365S200000
Reexamination Certificate
active
06879504
ABSTRACT:
Content addressable memory (CAM) devices include error detection and correction (EDC) control circuits therein. The EDC control circuit operates to correct soft errors in entries within a plurality of internal CAM array blocks with, at most, limited interruption to other operations performed by the CAM device. The EDC control circuit utilizes a multi-bit check word associated with each entry to detect a soft error and perform one-bit error correction on the entry. The EDC control circuit is configured to be active during a background mode of operation when the CAM array blocks are undergoing search operations in a foreground mode of operation. A CAM array block may also include a column of dual-function check bit cells that are configured to operate as a column of CAM cells when necessary to replace a defective column of CAM cells.
REFERENCES:
patent: 3665422 (1972-05-01), McCoy et al.
patent: 4112502 (1978-09-01), Scheuneman
patent: 4747080 (1988-05-01), Yamada
patent: 4779226 (1988-10-01), Haraszti
patent: 4791606 (1988-12-01), Threewitt et al.
patent: 4903268 (1990-02-01), Hidaka et al.
patent: 4958352 (1990-09-01), Noguchi et al.
patent: 4991136 (1991-02-01), Mihara
patent: 5127014 (1992-06-01), Raynham
patent: 5184325 (1993-02-01), Lipovski
patent: 5233614 (1993-08-01), Singh
patent: 5319589 (1994-06-01), Yamagata et al.
patent: 5450424 (1995-09-01), Okugaki et al.
patent: 5455834 (1995-10-01), Chang et al.
patent: 5469450 (1995-11-01), Cho et al.
patent: 5491703 (1996-02-01), Barnaby et al.
patent: 5561429 (1996-10-01), Halberstam et al.
patent: 5570377 (1996-10-01), Merino Gonzalez et al.
patent: 5572460 (1996-11-01), Lien
patent: 5604753 (1997-02-01), Bauer et al.
patent: 5629950 (1997-05-01), Godiwala et al.
patent: 5642320 (1997-06-01), Jang
patent: 5644583 (1997-07-01), Garcia et al.
patent: 5682394 (1997-10-01), Blake et al.
patent: 5699369 (1997-12-01), Guha
patent: 5724296 (1998-03-01), Jang
patent: 5727003 (1998-03-01), Zook
patent: 5761222 (1998-06-01), Baldi
patent: 5796671 (1998-08-01), Wahlstrom
patent: 5796758 (1998-08-01), Levitan
patent: 5872802 (1999-02-01), Knaack et al.
patent: 6009548 (1999-12-01), Chen et al.
patent: 6032214 (2000-02-01), Farmwald et al.
patent: 6058500 (2000-05-01), DesJardins et al.
patent: 6067656 (2000-05-01), Rusu et al.
patent: 6134631 (2000-10-01), Jennings, III
patent: 6137707 (2000-10-01), Srinivasan et al.
patent: 6151247 (2000-11-01), Estakhri et al.
patent: 6154384 (2000-11-01), Nataraj et al.
patent: 6188629 (2001-02-01), Kaplinsky
patent: 6199140 (2001-03-01), Srinivasan et al.
patent: 6216246 (2001-04-01), Shau
patent: 6219815 (2001-04-01), DesJardins et al.
patent: 6233717 (2001-05-01), Choi
patent: 6243281 (2001-06-01), Pereira
patent: 6289471 (2001-09-01), Gordon
patent: 6324087 (2001-11-01), Pereira
patent: 6362990 (2002-03-01), Gibson et al.
patent: 6374325 (2002-04-01), Simpson et al.
patent: 6381191 (2002-04-01), Ooishi
patent: 6397290 (2002-05-01), Williams et al.
patent: 6408417 (2002-06-01), Moudgal et al.
patent: 6421265 (2002-07-01), Lien et al.
patent: 6430073 (2002-08-01), Batson et al.
patent: 6434033 (2002-08-01), Chien
patent: 6477615 (2002-11-01), Tanaka
patent: 6538911 (2003-03-01), Allan et al.
patent: 6542391 (2003-04-01), Pereira et al.
patent: 6560156 (2003-05-01), Lien et al.
patent: 6563754 (2003-05-01), Lien et al.
patent: 6597595 (2003-07-01), Ichiriu et al.
patent: 6618281 (2003-09-01), Gordon
patent: 6690595 (2004-02-01), Srinivasan et al.
patent: 6700810 (2004-03-01), Ichiriu et al.
patent: 6700827 (2004-03-01), Lien et al.
patent: 6707693 (2004-03-01), Ichiriu et al.
patent: 6728124 (2004-04-01), Ichiriu et al.
patent: 6741253 (2004-05-01), Radke et al.
patent: 6775168 (2004-08-01), Park et al.
patent: 20020067632 (2002-06-01), Batson et al.
patent: 20020075714 (2002-06-01), Pereira et al.
patent: 20020159320 (2002-10-01), Lien et al.
patent: 20030007408 (2003-01-01), Lien et al.
patent: 20030074630 (2003-04-01), Batson et al.
patent: 20030081464 (2003-05-01), Vlasenko
Halsall, Fred, “Data Communications, Computer Networks and OSI,” Second Edition, 11 pages, No Date.
Fourouzan, Behrouz, “Introduction to Telecommunications and Networking,” Chapter 8, pp. 194-226, No Date.
Kalter et al., “A 50-ns 16-Mb DRAM with a 10-ns Data Rate and On-Chip ECC,” IEEE Journal of Solid-State Circuits, vol. 25, No. 5, Oct. 1990, pp. 1118-1127.
SiberCore Technologies, Soft Error in TCAMS: Causes and Cures, Jul. 2003, 5 pages.
Baumann Mark
Lien Chuen-Der
Park Kee
Wu Chau-Chin
Hoang Huan
Integrated Device Technology Inc.
Myers Bigel & Sibley Sajovec, PA
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