The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 26, 2012
Filed:
May. 25, 2011
Rajiv V. Joshi, Yorktown Heights, NY (US);
Jente B Kuang, Austin, TX (US);
Rouwaida N. Kanj, Round Rock, TX (US);
Sani R. Nassif, Austin, TX (US);
Hung Cai Ngo, Austin, TX (US);
Rajiv V. Joshi, Yorktown Heights, NY (US);
Jente B Kuang, Austin, TX (US);
Rouwaida N. Kanj, Round Rock, TX (US);
Sani R. Nassif, Austin, TX (US);
Hung Cai Ngo, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A 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.