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:
Jan. 04, 2005
Filed:
Mar. 11, 2003
Robert J. Proebsting, Senora, CA (US);
Kee Park, San Jose, CA (US);
Scott Yu-fan Chu, Cupertino, CA (US);
Robert J. Proebsting, Senora, CA (US);
Kee Park, San Jose, CA (US);
Scott Yu-Fan Chu, Cupertino, CA (US);
Integrated Device Technology, Inc., Santa Clara, CA (US);
Abstract
Content addressable memory (CAM) devices achieve high integration by utilizing one or more CAM arrays that are each partitioned by rows into a CAM cell sub-array and a dedicated mask cell sub-array. Each row of mask cells within the mask cell sub-array can be selectively read during one search operation and then used to globally mask one or more columns of the CAM cell sub-array during a following search operation. Mask assertion circuitry is provided to couple a respective mask cell sub-array to a bit/data line control circuit that drives bit and/or data lines to the CAM cell sub-array during read, write and search operations. The mask cell sub-array and CAM cell sub-array may be segmented arrays that support pipelined search, write and read mask operations.