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Dynamic reference current sensing using multiple reference cells

  • US 10,553,288 B2
  • Filed: 06/29/2018
  • Issued: 02/04/2020
  • Est. Priority Date: 09/11/2013
  • Status: Active Grant
First Claim
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1. A circuit comprising:

  • a memory cell configured to generate a cell current having a cell current value;

    a first reference cell configured to generate a first current having a first current value;

    a second reference cell configured to generate a second current having a second current value;

    a current generating circuit configured to generate a reference current having a reference current value based on the first current value and the second current value; and

    a sense amplifier comprising;

    a comparison node; and

    a buffer comprising a single input terminal coupled to the comparison node,wherein the sense amplifier is configured tosum, at the comparison node, a third current having the cell current value and a fourth current having the reference current value, thereby developing a voltage on the comparison node, anduse the buffer to generate an output of the sense amplifier, the output having a logical value determined by the voltage received at the single input terminal.

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