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Power conserving adaptive control system for generating signal in portable medical devices

  • US 6,863,652 B2
  • Filed: 03/10/2003
  • Issued: 03/08/2005
  • Est. Priority Date: 03/13/2002
  • Status: Expired due to Term
First Claim
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1. A system for adjusting power employed by a light emitting device used for medical applications, comprising:

  • a light emitting device;

    a power unit coupled to said light emitting device for powering the light emitting device and responsive to a control signal for adjusting power applied to the light emitting device;

    a control unit for providing the control signal and coupled to the power unit, the control signal being determined in response to an estimated signal quality value required for measuring a physiological parameter and a characteristic of a signal associated with the physiological parameter measured using light produced by the light emitting device.

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