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Voltage reference and temperature sensor

  • US 8,350,552 B1
  • Filed: 12/05/2011
  • Issued: 01/08/2013
  • Est. Priority Date: 12/10/2010
  • Status: Active Grant
First Claim
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1. Apparatus for providing a voltage reference, the apparatus comprising:

  • a semiconductor device;

    current means selectively and alternatively passing a first current or a second current, the second current smaller in magnitude than the first current, through the semiconductor device;

    first measurement means measuring a first voltage drop across the semiconductor device during the passing of the first current;

    second measurement means measuring a second voltage drop across the semiconductor device during the passing of the second current;

    calculation means responsive to the first voltage drop and to the second voltage drop, yielding a voltage reference.

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