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:
Apr. 22, 2008
Filed:
Jan. 04, 2007
Duane Rodney Aadsen, Bath, PA (US);
Dennis E. Dudeck, Hazleton, PA (US);
Donald A. Evans, Lancaster, OH (US);
Duane Rodney Aadsen, Bath, PA (US);
Dennis E. Dudeck, Hazleton, PA (US);
Donald A. Evans, Lancaster, OH (US);
Agere Systems Inc., Allentown, PA (US);
Abstract
Content addressable memories are disclosed that provide at least three states and are based on existing binary CAM devices. A higher order CAM having at least three states comprises a binary CAM having two binary bits; and a logic circuit to configure the two binary bits as a single CAM bit having said at least three states. The three states include a don't care state, a logic 0 state and a logic 1 state. The logic circuit may be embodied as two OR gates. The first match search (MS) input and a first wild card (WC) input of the higher order CAM are applied to inputs of the two OR gates and the outputs of the two OR gates are applied to the wild card (WC) inputs of the binary CAM. The match search (MS) inputs of the binary CAM are tied to a power supply voltage.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile