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System and method for calibrating temperatures sensor for integrated circuits

  • US 9,442,025 B2
  • Filed: 10/30/2013
  • Issued: 09/13/2016
  • Est. Priority Date: 10/30/2013
  • Status: Active Grant
First Claim
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1. A method for calibrating integrated circuit temperature sensors, comprising:

  • sensing a first temperature using a first temperature sensor and a second temperature using a second temperature sensor, wherein the first temperature sensor is calibrated and is external to a package of the integrated circuit, and wherein the second temperature sensor is included in the integrated circuit;

    increasing a temperature of the integrated circuit;

    allowing the integrated circuit and the package to thermally equilibrate over a first period of time;

    sensing a first slope of a temperature decay by the first temperature sensor;

    sensing a second slope of a temperature decay by the second temperature sensor;

    comparing the first temperature to the second temperature to determine a temperature offset;

    comparing the first slope to the second slope to determine a slope offset; and

    calibrating the second temperature sensor using the temperature offset and the slope offset.

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