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Low power pulse oximeter

DC CAFC
  • US 7,295,866 B2
  • Filed: 02/24/2004
  • Issued: 11/13/2007
  • Est. Priority Date: 07/02/2001
  • Status: Expired due to Term
First Claim
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1. A method of managing power consumption in a pulse oximeter, the method comprising:

  • operating a pulse oximeter at a first approximate power consumption during a first signal condition representative of a condition of a signal received from a sensor capable of detecting energy attenuated by tissue of a measurement site of a patient;

    determining a second signal condition of the signal; and

    operating the pulse oximeter at a second approximate power consumption different than the first approximate power consumption based on the second signal condition, wherein the step of operating the pulse oximeter at the first approximate power consumption comprises generating a drive signal for the sensor at a first duty cycle, and wherein the step of operating the pulse oximeter at the second approximate power consumption comprises generating the drive signal for the sensor at a second duty cycle different from the first duty cycle.

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