Competitive Advantages: High sensitivity, Low power consumption, Improved accuracy and range for blood glucose measurements, Decreased noise from measurements. A biosensor for an analyte monitoring system. In one embodiment, the biosensor includes a cascade common source transimpedance amplifier circuit, an analog to digital converter, and an output circuit. The cascade common source transimpedance amplifier circuit is configured to receive an electrical current generated by an electrochemical reaction of an analyte on a test strip. The cascade common source transimpedance amplifier circuit is also configured to convert the electrical current to an analog voltage signal. The analog to digital converter is configured to convert the analog voltage signal to a digital voltage signal. The output circuit is configured to transmit a signal indicating a measured level of the analyte based on the digital voltage signal.USF inventors have created an ultra low noise and power transimpedance amplifier (TIA) to be used with a glucose meter. A multistage complementary metal-oxide-semiconductor (CMOS) TIA system has been designed. This novel technology has multiple advantages, including low power consumption, low input impedance, and low noise.
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