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REGIONAL OXIMETRY ANALOG FRONT END

  • US 20100312080A1
  • Filed: 06/04/2010
  • Published: 12/09/2010
  • Est. Priority Date: 06/05/2009
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a first amplifier having a first input coupled to a first optical detector and having a first output corresponding to a logarithm of the first input;

    a second amplifier having a second input coupled to a second optical detector and having a second output corresponding to a logarithm of the second input; and

    a differential amplifier having a differential output, the differential amplifier configured to amplify a difference between the first output and the second output and generate an output signal, the output signal provided at the differential output.

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