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Noise modulation for on-chip noise measurement

  • US 9,797,938 B2
  • Filed: 03/28/2014
  • Issued: 10/24/2017
  • Est. Priority Date: 03/28/2014
  • Status: Active Grant
First Claim
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1. A device for estimating a voltage level of an on-chip noise signal of a computer chip, the device comprising:

  • a voltage-to-frequency conversion structure that represents a relationship between an input voltage provided to a voltage-controlled oscillator on the computer chip and an output frequency generated by the voltage-controlled oscillator; and

    a noise estimation unit comprising at least one member of the group consisting of an integrated circuit and a processor with associated memory that is external to the computer chip, the noise estimation unit configured to;

    receive a frequency-varying signal that is representative of the on-chip noise signal determined at a determination point on the computer chip;

    extract frequency information from the frequency-varying signal; and

    convert the frequency information to the voltage level associated with the on-chip noise signal based, at least in part, on the voltage-to-frequency conversion structure.

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