IMPLANTED SENSOR PROCESSING SYSTEM AND METHOD FOR PROCESSING IMPLANTED SENSOR OUTPUT
First Claim
1. A system comprising:
- a sensor unit for taking quantitative analyte measurements, the sensor unit including a first inductor forming part of a power supply for said sensor unit, a load coupled to said first inductor, and a sensor circuit for modifying said load in accordance with sensor measurement information obtained by said sensor circuit;
a reader including a second inductor that is mutually inductively coupled to said first inductor upon said second inductor being placed within a predetermined proximal distance from said first inductor, a driver for driving said second inductor to induce a charging current in said first inductor, a detector for detecting variations in a load on said second inductor induced by changes to said load in said sensor unit and for providing information signals corresponding to said load changes, and a processor for receiving and processing said information signals.
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Accused Products
Abstract
A quantitative measurement system includes an external unit and an internal unit and is provided for obtaining quantitative analyte measurements, such as within the body. In one example application, the internal unit would be implanted either subcutaneously or otherwise within the body of a subject. The internal unit contains optoelectronics circuitry, a component of which may be comprised of a fluorescence sensing device. The optoelectronics circuitry obtains quantitative measurement information and modifies a load as a function of the obtained information. The load in turn varies the amount of current through coil, which is coupled to a coil of the external unit. A demodulator detects the current variations induced in the external coil by the internal coil coupled thereto, and applies the detected signal to processing circuitry, such as a pulse counter and computer interface, for processing the signal into computer-readable format for inputting to a computer.
7 Citations
25 Claims
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1. A system comprising:
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a sensor unit for taking quantitative analyte measurements, the sensor unit including a first inductor forming part of a power supply for said sensor unit, a load coupled to said first inductor, and a sensor circuit for modifying said load in accordance with sensor measurement information obtained by said sensor circuit; a reader including a second inductor that is mutually inductively coupled to said first inductor upon said second inductor being placed within a predetermined proximal distance from said first inductor, a driver for driving said second inductor to induce a charging current in said first inductor, a detector for detecting variations in a load on said second inductor induced by changes to said load in said sensor unit and for providing information signals corresponding to said load changes, and a processor for receiving and processing said information signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A sensor device for detecting the presence or concentration of an analyte in a medium, comprising:
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a sensor body; an indicator having a characteristic that is affected by the presence or concentration of an analyte; a detector configured to detect a signal from said indicator, said signal being indicative of the characteristic of the indicator; and a first inductor coupled to said detector, said first inductor being adapted to receive from a second inductor a magnetically induced electric current, and being further adapted to induce in said second inductor an electric current that changes as a function of the signal detected by said detector. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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Specification