Adaptive dynamic reading of flash memories

Details Adaptive dynamic reading of flash memories Adaptive dynamic reading of flash memories

2011-03-08

2011-03-08

Le, Vu A (Department: 2824)

Static information storage and retrieval

Floating gate

Particular biasing

C365S185030, C365S185200

Reexamination Certificate

active

07903468

ABSTRACT:
Each of a plurality of flash memory cells is programmed to a respective one of L≧2 threshold voltage states within a threshold voltage window. Values of parameters of threshold voltage functions are adjusted in accordance with comparisons of the threshold voltages of some or all of the cells to two or more of m≧2 threshold voltage intervals within the threshold voltage window. Reference voltages for reading the cells are selected based on the values. Alternatively, the m threshold voltage intervals span the threshold voltage window, and respective threshold voltage states are assigned to the cells based on numbers of cells whose threshold voltages are in the intervals, without re-reading the cells.

REFERENCES:
patent: 5657332 (1997-08-01), Auclair et al.
patent: 6522580 (2003-02-01), Chen et al.
patent: 6751766 (2004-06-01), Guterman et al.
patent: 2006/0126382 (2006-06-01), Maayan et al.
patent: 2007/0091677 (2007-04-01), Lasser et al.
patent: 2008/0019182 (2008-01-01), Yanagidaira et al.
patent: 2008/0077841 (2008-03-01), Gonzalez et al.
patent: 2008/0077842 (2008-03-01), Gonzalez et al.
patent: 2010/0020604 (2010-01-01), Cornwell et al.
patent: WO2008/111058 (2008-09-01), None
A .P .Dempster, N .M .Laird and D .B .Rubin,, Maximum likelihood from incomplete data via the EM algorithm:, Journal of the Royal Statistical Society, vol. 39 No. 1 pp. 1-39 (1977), 1997.
Manfred K. W armuth and Yoram Singer., “A new parameter estimation method for Geussian mixtures”, Mar. 16, 1998.
U.S. Appl. No. 11/808,906, filed Jun. 2008, Eran Sharon et al.

Affiliated with

Also associated with

Rating

Adaptive dynamic reading of flash memories does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Adaptive dynamic reading of flash memories, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adaptive dynamic reading of flash memories will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2639907