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:
May. 22, 2007
Kee Park, San Jose, CA (US);
Kee Park, San Jose, CA (US);
Integrated Device Technology, Ltd., San Jose, CA (US);
Abstract
A content addressable memory array includes a plurality of rows of active CAM cells electrically coupled to a corresponding plurality of active match lines and at least one row of dummy cells, which are configured to generate an always-match condition on a dummy match line when the CAM array is undergoing a search operation. A match line pull-up circuit is provided. This match line pull-up circuit is electrically coupled to the plurality of active match lines and the dummy match line. The pull-up circuit is responsive to a calibration control signal that sets a pull-up strength of the match line pull-up circuit when the CAM array is undergoing the search operation. A sense amplifier, which is coupled to the match lines, includes a control circuit configured to adjust the calibration control signal in response to evaluating a first voltage on the dummy match line relative to a reference voltage.