Susceptance measurement for identifying biochemical sensors
First Claim
1. An electronic system, comprising:
- an excitation source configured to generate a time-varying excitation signal to be conductively coupled to a biochemical test strip assembly, and configured to apply a specified time-varying signal to a calibration device;
a measurement circuit comprising an analog-to-digital converter, the measurement circuit configured to digitize a calibration signal from the calibration device, the calibration signal elicited by the applied specified time-varying signal, and to digitize an identification signal elicited from the biochemical test strip assembly by the excitation signal, perform a discrete Fourier transform on the digitized identification signal, and determine a susceptance value from the digitized identification signal to identify the biochemical test strip, including adjusting an imaginary-valued component of the digitized identification signal using an imaginary-valued component of the digitized calibration signal;
wherein the biochemical test strip assembly includes two or more conductive regions configured to establish a specified susceptance value within a specified range when measured at a specified frequency, for measurement by the measurement circuit, the susceptance value established to permit identification the biochemical test strip assembly.
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Accused Products
Abstract
Subject matter herein can include identifying a biochemical test strip assembly electrically, such as using the same test circuitry as can be used to perform an electrochemical measurement, without requiring use of optical techniques. The identification can include using information about a measured susceptance of an identification feature included as a portion of the test strip assembly. The identification can be used by test circuitry to select test parameters or calibration values, or to select an appropriate test protocol for the type of test strip coupled to the test circuitry. The identification can be used by the test circuitry to validate or reject a test strip assembly, such as to inhibit use of test strips that fail meet one or more specified criteria.
9 Citations
22 Claims
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1. An electronic system, comprising:
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an excitation source configured to generate a time-varying excitation signal to be conductively coupled to a biochemical test strip assembly, and configured to apply a specified time-varying signal to a calibration device; a measurement circuit comprising an analog-to-digital converter, the measurement circuit configured to digitize a calibration signal from the calibration device, the calibration signal elicited by the applied specified time-varying signal, and to digitize an identification signal elicited from the biochemical test strip assembly by the excitation signal, perform a discrete Fourier transform on the digitized identification signal, and determine a susceptance value from the digitized identification signal to identify the biochemical test strip, including adjusting an imaginary-valued component of the digitized identification signal using an imaginary-valued component of the digitized calibration signal; wherein the biochemical test strip assembly includes two or more conductive regions configured to establish a specified susceptance value within a specified range when measured at a specified frequency, for measurement by the measurement circuit, the susceptance value established to permit identification the biochemical test strip assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. The electronic system of claim wherein the two or more measurement electrodes and the first and second conductive regions are conductively coupled to an electrical interconnect comprising a portion of the biochemical test strip assembly.
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14. A method for identifying a biochemical test strip assembly;
- the method comprising;
applying a specified time-varying signal to a calibration device; digitizing a calibration signal from the calibration device, the calibration signal elicited by the applied specified time-varying signal; generating a time-varying excitation signal and conductively coupling the generated time-varying excitation signal to a biochemical test strip assembly; digitizing an identification signal elicited from the biochemical test strip assembly by the excitation signal; using a circuit;
performing a discrete Fourier transform on the digitized identification signal; andusing an output of the discrete Fourier transform, determining a susceptance value from the digitized identification signal to identify the biochemical test strip, including adjusting an imaginary-valued component of the digitized identification signal using an imaginary-valued component of the digitized calibration signal; wherein the biochemical test strip assembly includes two or more conductive regions configured to establish a specified susceptance value within a specified range when measured at a specified frequency, the susceptance value established to permit identification the biochemical test strip assembly. - View Dependent Claims (15, 16, 17, 18, 19)
- the method comprising;
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20. An electronic system for identifying a biochemical test strip assembly, the electronic system comprising:
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a signal source means for applying a specified time-varying signal to a calibration device; a means for digitizing a calibration signal from the calibration device, the calibration signal elicited by the applied specified time-varying signal; a means for generating a time-varying excitation signal and conductively coupling the generated time-varying excitation signal to the biochemical test strip assembly; a means for digitizing an identification signal elicited from the biochemical test strip assembly by the excitation signal; a means for performing a discrete Fourier transform on the digitized identification signal; and using an output of the discrete Fourier transform, a means for determining a susceptance value from the digitized identification signal to identify the biochemical test strip including adjusting an imaginary-valued component of the digitized identification signal using an imaginary-valued component of the digitized calibration signal; wherein the biochemical test strip assembly includes an identification feature to establish a specified susceptance value within a specified range when measured at a specified frequency, the susceptance value established to permit identification the biochemical test strip assembly. - View Dependent Claims (21, 22)
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Specification