Nonvolatile semiconductor memory

Details Nonvolatile semiconductor memory Nonvolatile semiconductor memory

2007-10-09

2007-10-09

Elms, Richard T. (Department: 2824)

Static information storage and retrieval

Read/write circuit

Including reference or bias voltage generator

C365S189020, C365S185180, C365S185220, C365S185240

Reexamination Certificate

active

11124253

ABSTRACT:
A transmission transistor transmitting a drain voltage is connected to an electrically rewritable nonvolatile memory cell. An operation control circuit controls program operation for increasing a threshold voltage of the memory cell, and verify operation which is performed before and after the program operation in order to verify the threshold voltage of the memory cell. A drain switching circuit connects during the verify operation a gate of the transmission transistor to a first voltage line through which a first voltage is supplied, and it connects during the program operation the same to a second voltage line through which a second voltage is supplied. Since the second voltage can be supplied to the transmission transistor only by the switching operation (selecting operation) of the drain switching circuit, the program operation can be started shortly after the verify operation. This can shorten the data write time to the memory cell.

REFERENCES:
patent: 5258958 (1993-11-01), Iwahashi et al.
patent: 5487034 (1996-01-01), Inoue
patent: 5526307 (1996-06-01), Yiu et al.
patent: 5555204 (1996-09-01), Endoh et al.
patent: 6301154 (2001-10-01), Sumitani
patent: 6680868 (2004-01-01), Akamatsu
patent: 58-114396 (1983-07-01), None
patent: 6-203590 (1994-07-01), None
patent: 7-169284 (1995-07-01), None
patent: 9-506203 (1997-06-01), None
patent: 11-25681 (1999-01-01), None

Affiliated with

Also associated with

Rating

Nonvolatile semiconductor memory does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Nonvolatile semiconductor memory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nonvolatile semiconductor memory will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3857029