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Time-dependent compensation currents in non-volatile memory read operations

  • US 7,535,769 B2
  • Filed: 04/24/2008
  • Issued: 05/19/2009
  • Est. Priority Date: 06/20/2005
  • Status: Active Grant
First Claim
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1. A method of reading data from non-volatile storage, comprising:

  • reading a first non-volatile storage element of a first string of non-volatile storage elements to determine whether said first non-volatile storage element is programmed to at least one predetermined state;

    reading a second non-volatile storage element of a second string of non-volatile storage elements to determine whether said second non-volatile storage element is programmed to said at least one predetermined state;

    reading a third non-volatile storage element of a third string of non-volatile storage elements using at least one compensation current and a first sampling period if at least one of said first non-volatile storage element and said second non-volatile storage element is programmed to said at least one predetermined state; and

    reading said third non-volatile storage element using a second sampling period if said first non-volatile storage element and said second non-volatile storage element are not programmed to said at least one predetermined state.

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