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:
May. 13, 2003
Filed:
Jul. 31, 2002
Alan Roth, Austin, TX (US);
Hamed Ghassemi, Austin, TX (US);
Other;
Abstract
A method for reducing the coupling noise in a Content Addressable Memory (CAM), the CAM having a first bitline pair and a second bitline pair, both pairs aligned along a first axis; a first memory cell connected to the first bitline pair and a second memory cell to the second bitline pair; having a first match line and a first word line aligned along a second axis, the first match line and the first word line connecting the first and the second memory cells defining a first row in a first column; having a second row adjacent the first row, the second row comprising a third cell and a fourth cell, the third and fourth cells connecting the first and second bitline pairs and a second word line and a second match line, the method comprising arranging the first memory cell in a first orientation and the second memory cell in a second orientation, wherein the second orientation being a first axis mirror image to the first orientation; segmenting the first and second bitline pairs between the first row and the second row; adding a first twisting structure to the first bitline pair and a second twisting structure to the second bitline pair; arranging the third cell in a third orientation, the third orientation being rotated 180 degrees with respect to the first orientation; and arranging the fourth cell in a fourth orientation, the fourth orientation being rotated 180 degrees with respect to the second orientation.