Static information storage and retrieval – Powering – Conservation of power
Reexamination Certificate
2011-08-09
2011-08-09
Nguyen, Viet Q (Department: 2827)
Static information storage and retrieval
Powering
Conservation of power
C365S226000, C365S228000
Reexamination Certificate
active
07995418
ABSTRACT:
A method and computer program product for controlling a storage device using per-element selectable power supply voltages provides energy conservation in storage devices while maintaining a particular performance level. The storage device is partitioned into multiple elements, which may be sub-arrays, rows, columns or individual storage cells. Each element has a corresponding virtual power supply rail that is provided with a selectable power supply voltage. The power supply voltage provided to the virtual power supply rail for an element is set to the minimum power supply voltage unless a higher power supply voltage is required for the element to meet performance requirements. A control cell may be provided within each element that provides a control signal that selects the power supply voltage supplied to the corresponding virtual power supply rail. The state of the cell may be set via a fuse or mask, or values may be loaded into the control cells at initialization of the storage device.
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Joshi Rajiv V.
Kanj Rouwaida N.
Kuang Jente B
Nassif Sani R.
Ngo Hung Cai
Harris Andrew M.
International Business Machines - Corporation
Mitch Harris Atty at Law, LLC
Nguyen Viet Q
Toub Libby Z.
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