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Signal processing apparatus and method

  • US 5,482,036 A
  • Filed: 05/26/1994
  • Issued: 01/09/1996
  • Est. Priority Date: 03/07/1991
  • Status: Expired due to Term
First Claim
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1. A signal processing apparatus comprising:

  • detector means for receiving a first signal which travels along a first propagation path and a second signal which travels along a second path, said detector comprising a light sensitive sensor configured to detect a physiological function, wherein said first signal has a first desired signal portion and a first undesired signal portion, and said second signal has a second desired signal portion and a second undesired signal portion; and

    reference processor means having an input for receiving said first and second signals for combining said first and second signals to generate a reference signal having a primary component which is a function of said first and said second undesired signal portions.

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