APPARATUS AND METHOD FOR CREATING MULTIPLE POLARITY INDICATING OUTPUTS FROM TWO POLARIZED PIEZOELECTRIC FILM SENSORS
First Claim
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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Accused Products
Abstract
An apparatus or method can be 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, and to process the received first and second information to produce an electronic signal output indicative of respiratory effort of the subject, the processing including averaging the received first information using a first differential amplifier and signal integrator with resistive reset to reduce differential noise and to attenuate common-mode noise, and averaging the received second information using a second differential amplifier and signal integrator with resistive reset to reduce differential noise and to attenuate common-mode noise.
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Citations
20 Claims
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system, comprising:
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a first respiratory effort belt including a first piezoelectric film sensor configured to sense a first movement indicative of respiratory effort of a subject; a second respiratory effort belt including a second piezoelectric film sensor configured to sense a second movement indicative of respiratory effort of the subject; an electronic signal processing circuit, coupled to the first and second piezoelectric film sensors, the electronic signal processing circuit configured to receive first and second information from the first and second piezoelectric film sensors and to process the received first and second information to produce an electronic signal output indicative of respiratory effort of the subject; wherein the electronic signal processing circuit includes; 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 in the second; wherein the electronic signal output indicative of respiratory effort of the subject includes; the averaged received first information; the averaged received second information; and a summation of the averaged received first information and the averaged received second information; and a polysomnograph machine, coupled to the electronic signal processing circuit, the polysomnograph machine configured to receive the averaged received first information, the averaged received second information, and the summation of the averaged received first information and the averaged received second information from the electronic signal processing circuit and to provide the averaged received first information, the averaged received second information, and the summation of the averaged received first information and the averaged received second information to a user.
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12. A method, comprising:
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receiving 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; and processing the received first and second information to produce an electronic signal output indicative of respiratory effort of the subject, the processing including; averaging the received first information using a first differential amplifier and signal integrator with resistive reset to reduce differential noise and to attenuate common-mode noise; and averaging the received second information using a second differential amplifier and signal integrator with resistive reset to reduce differential noise and to attenuate common-mode noise. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification