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:
Aug. 03, 2004
Filed:
Jun. 20, 2002
Applicant:
Inventors:
Paul Cheng, San Jose, CA (US);
Nelson L. Chow, Mountain View, CA (US);
Assignee:
Integrated Silicon Solution, Inc., Santa Clara, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 1/200 ;
U.S. Cl.
CPC ...
G06F 1/200 ;
Abstract
A fast aging system ( ) which may work with a memory ( ) in which data words ( ) having aging words ( ) are stored. An aging address counter ( ) selects an aging word ( ) for updating based on a state change in a linear feedback shift register (LFSR) ( ). Optionally, in the aging word ( ) a zero value ( ) may represent a permanent data words ( ), a predefined non-zero value ( ) may represent data words ( ) which are available for replacement, and other zero values may represent data words ( ) which are in various stages of valid lifetimes and which should not be replaced yet.