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. 31, 2002
Filed:
Dec. 17, 1999
Applicant:
Inventor:
Jayan Ramankutty, Fremont, CA (US);
Assignee:
Lara Technology, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 1/200 ;
U.S. Cl.
CPC ...
G06F 1/200 ;
Abstract
A ternary CAM ( ) includes a CAM cell array ( ) arranged into groups ( - to - ) for storing data values having a predetermined prefix length. The groups ( - to - ) are arranged in an order that allows for longest prefix match searches. A prefix length translator ( ) can receive prefix length values and translate them into corresponding CAM cell array addresses (CAM_ADD). Thus, a prefix value and corresponding data value can be applied to the CAM ( ) and the data value can be written into the group ( - to - ) corresponding to its prefix length. In this way, a table update operation can be performed without having to reorder entries in the ternary CAM ( ).