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Signal processing apparatus

  • US 8,036,728 B2
  • Filed: 06/21/2007
  • Issued: 10/11/2011
  • Est. Priority Date: 03/07/1991
  • Status: Expired due to Fees
First Claim
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1. A pulse oximetry system comprising:

  • an optical probe including light emitting elements and a light detecting element, said light detecting element configured to output a signal representative of light attenuated by tissue of a patient, said signal comprising signal portions and noise portions; and

    a patient monitor comprising;

    a sensor port communicating with said optical probe to receive said signal;

    delta sigma converter that converts the signal to a digital signal; and

    a signal processor configured to enhance the digitized signal using an adaptive algorithm for use in calculating a physiological parameter.

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