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US 9,435,763 B2Granted
Absolute temperature method for disposable glucose strip
AssigneeStmicroelectronics Pte Ltd
InventorsOlivier Le Neel, Suman Cherian
Life of this patent
Estimating the term…
Abstract
A bio-fluid test strip includes a fluid receiving area and a contact pad area for interfacing with a fluid sensing device. The test strip includes a fluid sensing electrodes and a first temperature sensing resistor in the fluid receiving area. The test strip further includes a second temperature sensing resistor in the contact pad area. The first and second temperature sensing resistors together provide an indication of the temperature difference between the fluid sensing area and ambience.
Claims21
A fluid test strip comprising:
- a fluid receiving area configured to receive a fluid to be tested;
- a first electrode positioned in the fluid receiving area;
- a second electrode positioned in the fluid receiving area;
- an enzyme covering the first and second electrodes;
- a first contact pad electrically coupled to the first electrode;
- a second contact pad electrically coupled to the second electrode;
- and
- a first resistor positioned within the fluid receiving area and configured to output a temperature signal indicative of a temperature of the fluid to be tested;
- and
- a dielectric material between the first resistor and the enzyme.
7 more elements
A device for measuring a concentration of a compound in a fluid, the device comprising:
- a substrate;
- a first electrode overlying the substrate;
- a second electrode overlying the substrate;
- a first resistor overlying the substrate;
- an enzyme overlying the first electrode, the second electrode, and the first resistor, the enzyme configured to react with the compound when the fluid contacts the enzyme;
- a dielectric material between the first resistor and the enzyme;
- a first contact pad on the substrate, the first contact pad being configured to supply a first voltage to the first electrode;
- a second contact pad on the substrate, the second contact pad being electrically coupled to the second electrode, the second contact pad configured to output a compound concentration signal indicative of the concentration of the compound in the fluid;
- and
- a third contact pad coupled to the first resistor and configured to output a temperature signal indicative of a temperature of the fluid.
7 more elements
A system comprising:
- a fluid test strip including:
- a fluid receiving area configured to receive a fluid;
- a test electrode in the fluid receiving area configured to provide an output signal indicative of a concentration of a compound in the fluid;
- a dry area spaced apart from the fluid receiving area;
- a first contact pad in the dry area electrically coupled to the test electrode;
- a first temperature sensor having a first portion in the dry area and a second portion in the fluid receiving area;
- a dielectric material between the first portion and the fluid;
- and
- a second contact pad in the dry area and electrically coupled to the first temperature sensor, the first temperature sensor being configured to output a first temperature signal indicative of a difference in a temperature of the fluid and a temperature of the dry area;
- a fluid test strip reader including:
- a port configured to receive the fluid test strip;
- and
- control circuitry configured to supply power to the fluid test strip, to receive the first temperature signal and the output signal from the fluid test strip, and to calculate a value of the concentration of the compound in the fluid based on the first temperature signal and the output signal.
10 more elements
A biosensor, comprising:
- a fluid receiving area, including
- a fluid sensor having a plurality of fluid sensor electrodes;
- an enzyme covering the fluid sensor electrodes;
- a fluid temperature sensor element;
- and
- a dielectric material between the enzyme and the fluid temperature sensor element;
- and
- a dry area, spaced apart from the fluid receiving area, the dry area including
- an ambient temperature sensor element;
- and
- a plurality of contact pads, each contact pad coupled to one of the fluid sensor electrodes or to the temperature sensor element.
8 more elements
Dependencies are inferred from the claim text.