×

System and method for a self-calibrating non-invasive sensor

  • US 6,889,153 B2
  • Filed: 08/09/2001
  • Issued: 05/03/2005
  • Est. Priority Date: 08/09/2001
  • Status: Expired due to Term
First Claim
Patent Images

1. A self-calibrating sensor system having at least one light source, the self-calibrating sensor system comprising:

  • a probe receiving incident light radiation from the at least one light source, the probe including a wavelength sensor comprising;

    a first diode configured to receive short wavelengths from the incident light radiation and produce a first photocurrent signal; and

    a second diode configured to receive short wavelengths from the incident light radiation and produce a second photocurrent signal; and

    ;

    a calibration circuit in signal communication with the probe, the calibration circuit producing a calibrated signal corresponding to the received incident light radiation at the probe;

    wherein the probe further includes a probe output circuit in signal communication with the calibration circuit, the probe output circuit producing a known sensor probe output signal when the first photocurrent signal and second photocurrent signal are approximately equal in magnitude.

View all claims
  • 10 Assignments
Timeline View
Assignment View
    ×
    ×