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3D thermal detection circuits and methods

  • US 9,599,517 B2
  • Filed: 10/17/2013
  • Issued: 03/21/2017
  • Est. Priority Date: 10/17/2013
  • Status: Active Grant
First Claim
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1. A circuit, comprising:

  • sensing circuitry including at least one sensing element configured to output at least one temperature-dependent voltage;

    a compare circuit configured to generate at least one intermediate voltage in response to comparing the at least one temperature-dependent voltage to a feedback voltage;

    a control circuit configured to generate at least one control signal in response to the intermediate voltage; and

    a switching circuit configured to couple a capacitor coupled to a feedback node to one of a first voltage supply and a second voltage supply in response to the at least one control signal to generate an output signal having a pulse width that is based on a temperature sensed by the sensing circuitry,wherein one of the at least one sensing element is disposed on a first layer of a three-dimensional integrated circuit, and wherein the compare circuit, the control circuit, and the switching circuit are disposed on a second layer of the three-dimensional integrated circuit.

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