Static information storage and retrieval – Read/write circuit – Including reference or bias voltage generator
Reexamination Certificate
2007-11-07
2010-02-02
Ho, Hoai V (Department: 2827)
Static information storage and retrieval
Read/write circuit
Including reference or bias voltage generator
C365S222000, C365S185270
Reexamination Certificate
active
07656720
ABSTRACT:
Apparatus, methods, and systems are disclosed, including those that are to prevent a bias voltage from rising to a higher level than a storage node voltage as the bias voltage transitions to a ground level. For example a first voltage generator may be utilized to generate a bias voltage to bias a transistor in a memory cell in a memory array. A second voltage generator may be utilized to generate an plate voltage. The memory cell may include a transistor on a substrate and a capacitor. The capacitor connects from a drain of the transistor to the plate voltage. The storage node voltage is located at the drain of the transistor. A power controller may provide an off signal to the first and second voltage generators. The bias voltage may then transition to ground from a voltage less than zero volts. The rate of the bias voltage rise to ground is such that the bias voltage is maintained at less than or equal to the storage node voltage during the transition time period.
REFERENCES:
patent: 5365487 (1994-11-01), Patel et al.
patent: 5798976 (1998-08-01), Arimoto
patent: 5953246 (1999-09-01), Takashima et al.
patent: 6246625 (2001-06-01), Yamagata et al.
patent: 6519191 (2003-02-01), Morishita
patent: 6990031 (2006-01-01), Hashimoto et al.
patent: 6992946 (2006-01-01), Ooishi
Drexler Adrian J.
Ito Yutaka
Jones Brandi M.
Ho Hoai V
Lappas Jason
Micro)n Technology, Inc.
Schwegman Lundberg & Woessner, P.A.
LandOfFree
Power-off apparatus, systems, and methods does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Power-off apparatus, systems, and methods, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power-off apparatus, systems, and methods will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4193877