Abstract
A wireless self-sufficient human body temperature monitoring system was designed using a 130 nm CMOS standard process. This miniaturized sensor grain enables significant cost advantages and impresses with its high level of integration. The RFID communication protocol ensures compatibility with state-of-the-art smart phones and tablets, thus facilitating point-of-care as well as end-user utilization. The biocompatible plaster enables cyclic measurements and also storage of the obtained data. In the range of 35 °C to 42 °C a $\pm3\sigma$ accuracy of ±0.4 °C can be achieved. The system is powered by a lithium based micro battery, which can be recharged wirelessly by any state-of-the-art near field communication device. Measurement data and monitoring history can be displayed via an Android™ software application on a commercial NFC compatible smartphone. The configuration and calibration data as well as the measurement results are stored in the integrated EEPROM. The main advantage of this system appliance is, that it can be easily used within the scope of medical attendance as well as home health care. For the save usage in hospitals additional investigations regarding Electromagnetic Interference using Near-Field Magnetic Scan were performed.
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