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Multistage autozero sensing for a multilevel non-volatile memory integrated circuit system

  • US 20030103400A1
  • Filed: 12/11/2002
  • Published: 06/05/2003
  • Est. Priority Date: 01/14/1999
  • Status: Active Grant
First Claim
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1. A sense amplifier comprising:

  • a first switch to selectively couple a data cell or a reference cell to a first node;

    a current generator coupled to the first node to provide a current indicative of a voltage on the first node;

    a comparison circuit having a first input coupled to the first node, having a second terminal coupled to a second node, and having an output terminal to generate an output signal indicative of the difference between the voltages on the first and second node; and

    a second switch coupled between the output terminal and the second node to set the voltage of the second node to a voltage indicative of the voltage on the first node in response to the first switch selectively coupling the reference cell to the first node.

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