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Apple Assigned Three Patents

Managing peak power in memory storage array, storage in analog memory cells, multi-die memory system

Managing peak power in memory storage array
Apple, Inc., Cupertino, CA, has been assigned a patent (8,649,240) developed by Edward M. McCombs, Austin, TX, for a mechanism for “managing peak power in a memory storage array.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A mechanism for managing peak power in a memory storage array that includes sub-array blocks may reduce the peak currents associated with read and write operations by staggering the wordline signal activation to each of the sub-array blocks. In particular, the wordline units within each sub-array block may generate the wordline signals to each sub-array block such that a read wordline signal of one sub-array block does not transition from one logic level to another logic level at the same time as the write wordline of another sub-array block. Further, the wordline units may generate the wordline signals to each sub-array block such that a read wordline of a given sub-array block does not transition from one logic level to another logic level at the same time as a read wordline signal of another sub-array block.

The patent application was filed on Feb. 18, 2013 (13/769,542).

Storage in analog memory cells
Apple, Inc., Cupertino, CA, has been assigned a patent (8,645,794) developed by four co-inventors for “storage in analog memory cells using a non-integer number of bits per cell.

The co-inventors are Avraham Meir, Rishon le-Zion, Israel, Micha Anholt, Tel-Aviv, Israel, Naftali Sommer, Rishon le-Zion, Israel, and Eyal Gurgi, Petah-Tikva, Israel.

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A method for data storage includes, in a first programming phase, storing first data in a group of analog memory cells by programming the memory cells in the group to a set of initial programming levels. In a second programming phase that is subsequent to the first programming phase, second data is stored in the group by: identifying the memory cells in the group that were programmed in the first programming phase to respective levels in a predefined partial subset of the initial programming levels; and programming only the identified memory cells with the second data, so as to set at least some of the identified memory cells to one or more additional programming levels that are different from the initial programming levels.

The patent application was filed on July 28, 2011 (13/192,495).

Redundant storage schemes for multi-die memory systems
Apple, Inc. Cupertino, CA, has been assigned a patent (8,677,203) developed by five co-inventors for a “redundant storage schemes for multi-die memory systems.

The co-inventors are Ofir Shalvi, Ra’anana, IL, Naftali Sommer, Rishon Lezion, Israel, Uri Perlmutter, Ra’anana, Israel, Julian Vlaiko, Kfar Saba, Israel, and Moshe Neerman, Hadera, Israel.

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A method for data storage includes storing data in a memory that includes one or more memory units, each memory unit including memory blocks. The stored data is compacted by copying at least a portion of the data from a first memory block to a second memory block, and subsequently erasing the first memory block. Upon detecting a failure in the second memory block after copying the portion of the data and before erasure of the first memory block, the portion of the data is recovered by reading the portion from the first memory block.”

The patent application was filed on Jan. 10, 2011 (12/987,175).

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