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. 26, 2003
Filed:
Feb. 26, 2002
Naoki Kanazawa, Chiba, JP;
Ryuichi Hata, Chiba, JP;
Kawasaki Microelectronics, Inc., Chiba, JP;
Abstract
In a content addressable memory (CAM), a spare CAM word serving as a redundant circuit is mounted in addition to a plurality of CAM words, and a storage section for holding information indicating whether there is a defective CAM word in the plurality of CAM words, and if there is one or more defective CAM word, address information of the defective CAM word. Control is applied according to the address information of the defective CAM word such that the defective CAM word is replaced with the spare CAM word. The search output of the defective CAM word is replaced with that of the spare CAM word. The spare CAM word serving as a redundant circuit is mounted without increasing a circuit scale and an output delay time, and a produce yield is improved.