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. 27, 2002
Filed:
Dec. 12, 2001
Robert E. Busch, Essex Junction, VT (US);
Kevin A. Batson, Williston, VT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A system and method is disclosed for operating a content addressable memory (CAM) within an integrated circuit using search signals at search input voltages which are substantially independent from an operating voltage of the CAM. A method is disclosed in which search signals are input to CAM cells of the CAM at search input voltages which are substantially independent of an operating voltage of storage elements within the CAM cells. A match signal is output upon detecting a matching condition between the search signals and data stored in the storage elements. The search input voltage can be within about 0.2V above a threshold voltage of a search input device of the CAM memory cell. Search input devices can be selected to have a lower threshold voltage than other devices included within the CAM cell.