Static information storage and retrieval – Floating gate – Particular biasing
Reexamination Certificate
2011-02-18
2011-12-06
Lappas, Jason (Department: 2827)
Static information storage and retrieval
Floating gate
Particular biasing
C365S185030
Reexamination Certificate
active
08072817
ABSTRACT:
Tracking cells are used in a memory system to improve the read process. The tracking cells can provide an indication of the quality of the data and can be used as part of a data recovery operation if there is an error. The tracking cells provide a means to adjust the read parameters to optimum levels in order to reflect the current conditions of the memory system. Read operations are performed on the tracking cells, where threshold voltages of physical states of the tracking cells are further apart than threshold voltages of physical states of non-tracking cells. Based on the read operations, an extent to which the tracking cells are errored is determined.
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Gongwer Geoffrey S
Gross Stephen J
Guterman Daniel C
Khalid Shahzad
Lappas Jason
SanDisk Technologies Inc.
Vierra Magen Marcus & DeNiro LLP
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