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METHODS AND SYSTEMS FOR PROVIDING POWER TO LIGHT SOURCES OF A PHYSIOLOGICAL MONITOR

  • US 20160081602A1
  • Filed: 09/17/2015
  • Published: 03/24/2016
  • Est. Priority Date: 09/18/2014
  • Status: Abandoned Application
First Claim
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1. A photoplethysmography (PPG) system, the system comprising:

  • a light drive circuit configured to provide a digital signal that provides power to a light source, the digital signal comprising a plurality of pulses, wherein at least one feature of the plurality of pulses is adjustable to vary the power provided to the light source, the light drive circuit being further configured to provide power to the light source during each pulse of the plurality of pulses, and wherein the plurality of pulses comprises one or more periods;

    a front end channel circuit configured to receive light generated by the light source in response to the plurality of pulses after the light has been attenuated by a body tissue, wherein the front end channel circuit comprises a response time; and

    wherein the one or more periods of the plurality of pulses are substantially shorter than the response time of the front end channel circuit.

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