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PHOTOPLETHYSMOGRAPHIC DEVICE AND METHODS THEREFORE

  • US 20130296665A1
  • Filed: 01/05/2012
  • Published: 11/07/2013
  • Est. Priority Date: 01/20/2011
  • Status: Active Grant
First Claim
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1. An optical measurement (OM) device, the device comprising:

  • an illumination assembly configured to output light from two or more light sources to a surface portion of a user for measurement;

    a detection assembly configured to detect the output light from the two or more light sources reflected from said surface portion of the user as a signal;

    an amplifier module coupled to the detection assembly configured to apply a gain to an alternating-current component of the signal; and

    a microcontroller coupled to the detection assembly configured to assess a direct-current voltage level of the signal,wherein the microcontroller is configured to control the light output at the illumination assembly based on said assessing the direct-current voltage level such that the alternating-current component of the signal is within a saturation level, upon the amplifier module applying the gain, andwherein the microcontroller is configured to select a gain value for said applying the gain based on said assessing the direct-current voltage level.

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