The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 12, 2005
Filed:
Jul. 15, 2003
Chuen-der Lien, Los Altos Hills, CA (US);
Kee Park, San Jose, CA (US);
Chau-chin Wu, Cupertino, CA (US);
Mark Baumann, Campbell, CA (US);
Chuen-Der Lien, Los Altos Hills, CA (US);
Kee Park, San Jose, CA (US);
Chau-Chin Wu, Cupertino, CA (US);
Mark Baumann, Campbell, CA (US);
Integrated Device Technology, Inc., Santa Clara, CA (US);
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.