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:
Jan. 12, 2016
Filed:
Jun. 06, 2013
Sangyeun Cho, Pittsburgh, PA (US);
Rami G. Melhem, Pittsburgh, PA (US);
Sangyeun Cho, Pittsburgh, PA (US);
Rami G. Melhem, Pittsburgh, PA (US);
UNIVERSITY OF PITTSBURGH—OF THE COMMONWEALTH SYSTEM OF HIGHER EDUCATION, Pittsburgh, PA (US);
Abstract
Systems and methods are disclosed that facilitate storage and retrieval of data to/from memory with permanent faults. Permanent 'stuck at' faults, associated with individual bits, interfere with Write operations. A memory bit with the SA-0 fault does not store the value '1' while a memory bit with the SA-1 fault does not store the value “0”. Hence, when later retrieved by a Read operation, stored data located on one or more bits having a permanent fault may be different from the data that was originally written. Techniques are disclosed that facilitate correct retrieval of data in the presence of “stuck at” faults by keeping track of the positions of the bits that are stuck at a value different from the ones that are written and then, at Read time, inverting the values read from those positions.