US Patent 7990795 Dynamic random access memory (DRAM) refresh

Patent 7990795 was granted and assigned to Freescale Semiconductor on August, 2011 by the United States Patent and Trademark Office.

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Patent

Patent attributes

Current Assignee

Freescale Semiconductor

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7990795

Date of Patent

August 2, 2011

Patent Application Number

12388922

Date Filed

February 19, 2009

Patent Primary Examiner

‌

Leon Viet Q Nguyen

Patent abstract

A method for refreshing a Dynamic Random Access Memory (DRAM) includes performing a refresh on at least a portion of the DRAM at a first refresh rate, and performing a refresh on a second portion of the DRAM at a second refresh rate. The second portion includes one or more rows of the DRAM which do not meet a data retention criteria at the first refresh rate, and the second refresh rate is greater than the first refresh rate.

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