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:
Aug. 15, 2006
Filed:
Jun. 30, 2004
Michael Ju Hyeok Lee, Austin, TX (US);
Sheldon B. Levenstein, Austin, TX (US);
Edelmar Seewann, Austin, TX (US);
Michael Ju Hyeok Lee, Austin, TX (US);
Sheldon B. Levenstein, Austin, TX (US);
Edelmar Seewann, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
An apparatus and method are disclosed for detecting multiple hits in CAM arrays. A binary address value is stored for each entry of the CAM array and is output to identify the matching entry for a single hit. However, to facilitate multiple hit detection, both the true and complement components of this address are stored and output to determine whether or not a multiple hit occurred. If a multiple hit occurs (e.g., more than one address location has been matched), all the bits that make up the binary address and the complement will not be complements of each other and a multiple hit condition can be detected by XORing each bit of an address location value with the complement of that address location value. If the XORed bits are equal to '1', then a single hit has occurred. Otherwise, a multiple hit has occurred.