Glucose measurement using a current source
A glucose, constant current source technology, applied in the field of glucose quantity, can solve the problems of expensive, complicated calibration or replacement of glucose meters
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[0022] A blood glucose meter comprising a blood sample test strip, a constant current source, a precision timer, a digital processor and memory, and analog measurement circuits such as a voltage comparator, an analog-to-digital converter (ADC), which eliminates the current state of the art glucose The complex analog front end and other related circuits of the design. When a blood sample is applied to the blood sample test strip, a charge Q is generated from the reaction between the enzymes in the test strip and the blood sample. The constant current source injects a constant current value I into the charge Q on the test strip for a precise measurement time determined when excess charge Q has been removed from the blood sample test strip. The precisely measured time is measured by a precision timer. The amount of charge Q is determined by Q=I*T, which is then converted to blood glucose level for display.
[0023] The ADC samples the voltage across the blood sample test strip ...
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