US Patent 7872890 Counter circuit for regular expression search engines
Patent 7872890 was granted and assigned to NetLogic Microsystems on January, 2011 by the United States Patent and Trademark Office.
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A counter circuit is configured to simultaneously maintain individual character match count values for a plurality of overlapping substrings of an input string of characters that match a portion of a regular expression stored in a plurality of rows of content addressable memory (CAM) cells of a ternary CAM device. The counter circuit is selectable between a normal operational mode in which all matching portions of the input string are identified, and a minimum match length operational mode in which only matching portions of the input string that have at least a specified minimum number of characters are identified.
US Patent 07872890 Counter circuit for regular expression search engines US Patent 7872890 Counter circuit for regular expression search engines
US Patent 07872890 Counter circuit for regular expression search engines
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