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:
Dec. 30, 2008
Filed:
Dec. 08, 2006
Rengarajan S Krishnan, Karnataka, IN;
Rashmi Sachan, Karnataka, IN;
Bryan D Sheffield, McKinney, TX (US);
Nisha Padattil Kuliyampattil, Karnataka, IN;
Rengarajan S Krishnan, Karnataka, IN;
Rashmi Sachan, Karnataka, IN;
Bryan D Sheffield, McKinney, TX (US);
Nisha Padattil Kuliyampattil, Karnataka, IN;
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A novel match/mismatch emulation scheme for an addressed location in a CAM system that includes a plurality of CAM blocks. The plurality of CAM blocks are organized into at least one rectangular array having rows each having a plurality of CAM blocks, a group of CAM cells and associated read/write bit lines connecting the group of CAM cells to an addressed search circuit. During debug mode, where the individual array cells do not participate in search, all the cells in the debug column behave the same way to emulate a match/mismatch on all words. The circuit provides a control input to include address evaluation of a debug cell in a row. The circuit also provides simultaneous switching noise analysis on an evaluating row. The resulting CAM cell provides a circuit to test individual rows for defects and noise analysis.