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:
Oct. 28, 2008
Filed:
Nov. 14, 2006
Derick Gardner Behrends, Rochester, MN (US);
Peter Thomas Freiburger, Rochester, MN (US);
Ryan Charles Kivimagi, Chatfield, MN (US);
Daniel Mark Nelson, Rochester, MN (US);
Derick Gardner Behrends, Rochester, MN (US);
Peter Thomas Freiburger, Rochester, MN (US);
Ryan Charles Kivimagi, Chatfield, MN (US);
Daniel Mark Nelson, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and enhanced Static Random Access Memory (SRAM) redundancy circuit reduce wiring and the required number of redundant elements. A bitline redundancy mechanism allows the swapping of a pair of bitlines for a redundant pair of bit columns. Two of the adjacent bitlines are swapped out at a time, one even and one odd. The swap is accomplished by steering the data around the bad columns and adding redundant columns on the end that are steered in when needed.