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APPARATUS AND METHOD FOR CREATING MULTIPLE POLARITY INDICATING OUTPUTS FROM TWO POLARIZED PIEZOELECTRIC FILM SENSORS

  • US 20090259135A1
  • Filed: 04/09/2009
  • Published: 10/15/2009
  • Est. Priority Date: 04/11/2008
  • Status: Abandoned Application
First Claim
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1. An apparatus, comprising:

  • an electronic signal processing circuit configured to receive first information indicative of respiratory effort of a subject from a first piezoelectric film sensor and second information indicative of respiratory effort of the subject from a second piezoelectric film sensor, wherein the electronic signal processing circuit is configured to process the received first and second information to produce an electronic signal output indicative of respiratory effort of the subject, the electronic signal processing circuit including;

    a first differential amplifier and signal integrator with resistive reset configured to average the received first information to reduce differential noise and to attenuate common-mode noise; and

    a second differential amplifier and signal integrator with resistive reset configured to average the received second information to reduce differential noise and to attenuate common-mode noise.

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