Threshold adjustment using data value balancing in analog memory device

Patent metadata

Field	Value
Publication number	US-9136015-B2
Application number	US-201313908041-A
Country	US
Kind code	B2
Filing date	Jun 3, 2013
Priority date	Apr 24, 2013
Publication date	Sep 15, 2015
Grant date	Sep 15, 2015

Abstract

A method, in a memory including multiple analog memory cells, includes segmenting a group of the memory cells into a common section and at least first and second dedicated sections. Each dedicated section corresponds to a read threshold that is used for reading a data page to be stored in the group. Data to be stored in the group is jointly balanced over a union of the common section and the first dedicated section, and over the union of the common section and the second dedicated section, to create a balanced page such that for each respective read threshold an equal number of memory cells will be programmed to assume programming levels that are separated by the read threshold. The balanced page is stored to the common and dedicated sections, and the read thresholds are adjusted based on detecting imbalance between data values in readout results of the balanced page.

First claim

The invention claimed is:

1. A method, comprising:
receiving a plurality of data bits for storage in a memory, wherein the memory includes a plurality of pages, wherein each page of the plurality of pages includes a plurality of memory cells, and wherein each memory cell of the plurality of memory cells is configured to store multiple data bits;
determining a first number of bits to modify of a first subset of the plurality of data bits;
modifying the first number of bits of t…

Assignees

• Apple Inc

Inventors

• Anholt Micha
• Gurgi Eyal
• Baum Barak
• Neerman Moshe
• Teitel Moti

Classifications

• G11C11/5642

  Physics · mapped topic

• G11C29/42

  Physics · mapped topic

• G11C16/00

  Physics · mapped topic

• G11C11/5628

  Physics · mapped topic

• G11C29/028

  Physics · mapped topic