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Techniques for detecting heart pulses and reducing power consumption in sensors

  • US 20050187446A1
  • Filed: 02/25/2004
  • Published: 08/25/2005
  • Est. Priority Date: 02/25/2004
  • Status: Active Grant
First Claim
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1. A pulse oximeter system comprising:

  • a drive interface that controls drive current of light emitting elements in a pulse oximeter sensor; and

    a feedback loop coupled around the pulse oximeter sensor and the drive interface that dynamically adjusts the drive current of the light emitting elements based on results of a comparison between a signal-to-noise ratio of a pulse oximeter signal and a threshold, wherein the pulse oximeter signal is generated by a photodetector in the pulse oximeter sensor.

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