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DRAM refresh scheme with flexible frequency for active and standby mode

  • US 6,894,917 B2
  • Filed: 01/17/2003
  • Issued: 05/17/2005
  • Est. Priority Date: 01/17/2003
  • Status: Active Grant
First Claim
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1. A method for providing a dynamic random access memory, DRAM, refresh with a flexible refresh frequency for active and standby mode comprising the step of:

  • providing a higher refresh frequency during active mode than for standby mode, wherein said higher refresh frequency during active mode allows faster restoration of cell data, which is degraded by capacitive coupling through selection and switching of one or more adjacent word lines, and wherein said refresh frequency during standby mode can be lowered since cell charge lost due to adjacent word line switching does not occur.

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