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Clusters of polynomials for data points

A storage device and data technology, applied in read-only memory, digital memory information, information storage, etc., can solve problems such as rising delay

Inactive Publication Date: 2016-06-01
SANDISK TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Can provide countermeasures against cross-coupling effects and skew when reading in DLA mode, which can have elevated latencies due to additional operations performed (e.g., additional read operations and calculations)

Method used

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  • Clusters of polynomials for data points
  • Clusters of polynomials for data points
  • Clusters of polynomials for data points

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] refer to figure 1 A particular embodiment of the system 100 includes a data storage device 102 coupled to a host device 130 . The data storage device 102 is configured to store data according to a write order that causes the logical page address of the data to decrease with increasing values ​​of the word line physical address to enhance read efficiency of differential look-ahead (DLA) mode read operations.

[0012] Host device 130 may be configured to provide data such as user data 132 to be stored at non-volatile memory 104 or to request data to be read from non-volatile memory 104 . For example, host device 130 may include a mobile phone, music player, video player, game console, e-book reader, personal digital assistant (PDA), computer such as a laptop or notebook computer, any other electronic device, or its combination. The host device 130 communicates through a host interface that may enable reading from and writing to the non-volatile memory 104 . For example...

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PUM

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Abstract

A method, system and storage device are generally directed to determining for each of a plurality of data points, a neighborhood of data points about each such data point. For each such neighborhood of data points, a projection set of polynomials is generated based on candidate polynomials. The projection set of polynomials evaluated on the neighborhood of data points is subtracted from the plurality of candidate polynomials evaluated on the neighborhood of data points to generate a subtraction matrix of evaluated resulting polynomials. The singular value decomposition of the subtraction matrix is then computed. The resulting polynomials are clustered into multiple clusters and then partitioned based on a threshold.

Description

technical field [0001] The present disclosure generally relates to writing data to memory in a data storage device. Background technique [0002] Non-volatile data storage devices, such as Universal Serial Bus (USB) flash memory devices or removable memory cards, have allowed increased portability of data and software applications. Flash memory devices can enhance data storage density by storing multiple bits in each flash memory cell. For example, multi-level cell (MLC) flash memory devices provide increased storage density by storing 3 bits per cell, 4 bits per cell, or more. Although increasing the number of bits per cell and reducing device feature size can increase the storage density of a memory device, the bit error rate of the data stored at the memory device can also increase. Cross-coupling effects from upper neighboring cells to a particular cell of the non-volatile memory being read results in a shift in the threshold voltage of the particular cell. The amount...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11C7/10G11C11/56G11C16/34
CPCG11C7/1006G11C11/5628G11C11/5642G11C16/10G11C16/3427G11C16/3436G11C2211/5646G11C2211/5648
Inventor M.拉瑟
Owner SANDISK TECH LLC