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Temperature sensor for a leadless cardiac pacemaker

  • US 9,060,692 B2
  • Filed: 05/23/2013
  • Issued: 06/23/2015
  • Est. Priority Date: 10/12/2010
  • Status: Active Grant
First Claim
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1. A leadless cardiac pacemaker comprising:

  • a hermetic housing configured to be implanted in a chamber of a human heart;

    a power source disposed in the housing;

    at least two electrodes supported by the housing;

    a semiconductor temperature sensor disposed in the housing, comprising;

    at least one bipolar transistor configured to receive current from the power supply and based thereon generate base-emitter voltages that are used to derive a complimentary-to-absolute-temperature (CTAT) signal and first and second proportional-to-absolute-temperature (PTAT) signals, the first PTAT signal being equal to the CTAT signal at a first temperature, the second PTAT signal being equal to the CTAT signal at a second different temperature;

    an analog-to-digital converter (ADC) configured to covert the CTAT signal and the first and second PTAT signals into a digital temperature output signal;

    a controller disposed in the housing and configured to deliver energy from the power source to the electrodes to stimulate the heart based on the digital temperature output signal from the semiconductor temperature sensor.

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