Static information storage and retrieval – Floating gate – Particular biasing
Reexamination Certificate
2008-01-01
2008-01-01
Phan, Trong (Department: 2827)
Static information storage and retrieval
Floating gate
Particular biasing
C365S185230, C365S185240, C365S185290, C365S185220
Reexamination Certificate
active
07315475
ABSTRACT:
A sense amplifier has first and second input nodes. A reference memory cell is connected to the first input node. To the second input node, a constant current source circuit and a main memory cell are connected via a first transistor and a second transistor, respectively. A current mirror type load circuit is provided as a load circuit of the reference memory cell and the main memory cell. When a threshold voltage of the reference memory cell is adjusted, the first transistor is turned on and the second transistor is turned off. When the threshold voltage of the memory cell is adjusted at verification of writing to/erasing from the memory cell, the first transistor is turned off and the second transistor is turned on.
REFERENCES:
patent: 6504778 (2003-01-01), Uekubo
patent: 6807097 (2004-10-01), Takano et al.
patent: 6829171 (2004-12-01), Ooishi
patent: 7139201 (2006-11-01), Tanaka et al.
Kabushiki Kaisha Toshiba
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Phan Trong
LandOfFree
Non-volatile semiconductor memory device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Non-volatile semiconductor memory device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-volatile semiconductor memory device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2806925