Sensor with an analyte modulator
First Claim
1. A sensor system comprising:
- a sensor; and
an analyte modulator having an output connected to an input of the sensor;
wherein the analyte modulator modulates analyte at a first time constant, an output of the sensor has a drift at a second time constant, and the first time constant is shorter than the second time constant.
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Accused Products
Abstract
A sensor system having an analyte modulator, detector and a pump. The concentration of an analyte sample may be modulated at one time constant. The detector may have an output with a drift at another time constant. The one time constant may be shorter than the latter time constant. The latter time constant may be substantially removed from the detector output with a discriminator. A reservoir may receive high concentrations of analyte from the modulator, before analyte is forwarded to the detector and pump via analyte conveyance lines and valving. The modulation or pre-concentration of analyte in the sensor system may entail shorter times and smaller volumes than those needed by the detector. Such mismatches may be alleviated via accumulation of analyte in the reservoir prior to being forwarded to the detector.
38 Citations
19 Claims
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1. A sensor system comprising:
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a sensor; and an analyte modulator having an output connected to an input of the sensor; wherein the analyte modulator modulates analyte at a first time constant, an output of the sensor has a drift at a second time constant, and the first time constant is shorter than the second time constant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for detection comprising:
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providing an analyte sample; detecting the analyte sample with a sensor that outputs a signal indicative of a parameter of the sample; measuring a drift time constant of the signal; modulating the analyte sample with a modulator at a modulation time constant prior to entry of the analyte sample into the sensor; and removing a portion of the signal indicative of a parameter of the sample having a drift time constant. - View Dependent Claims (14, 15, 16)
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17. A system for measuring analyte, comprising:
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a modulator for modulating analyte; and a sensor for detecting analyte; and a discriminator connected to the sensor; wherein; the modulator modulates the analyte with a signal having a first time constant; a sensor output signal comprises a modulated analyte signal having a first time constant and a drift signal having a second time constant; and the discriminator removes a signal having a second time constant from the sensor output signal. - View Dependent Claims (18, 19)
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Specification