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. 17, 2006
Filed:
Oct. 07, 2004
Matthew Breitwisch, Essex Junction, VT (US);
Chung H. Lam, Peekskill, NY (US);
Steven Mittl, Essex, VT (US);
Jian W. Zhu, Flushing, NY (US);
Matthew Breitwisch, Essex Junction, VT (US);
Chung H. Lam, Peekskill, NY (US);
Steven Mittl, Essex, VT (US);
Jian W. Zhu, Flushing, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A reprogrammable integrated circuit (IC) including overwritable nonvolatile storage cells. Cell contents are compared in a differential sense amplifier against a variable reference signal that has a number of selectable reference levels corresponding to reprogrammed cell threshold voltages. With each write cycle the nonvolatile storage cells are overwritten and then, compared against a different, e.g., higher, selectable reference level.