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The paper proposes new technologies to support independence and engagement in elderly people living alone at home in the framework of a new UE Integrated Project. Aim of the study is the development of a light technological infrastructure to be integrated in the homes of old people at reduced costs, allowing the detection of critical health situations. In particular a reliable fall detector is presented,...
In this paper we present a 10-bit, two-bit per cycles successive-approximation A/D converter (ADC). The circuit, operated at 60 MHz clock frequency, achieves a sampling frequency of 10 MHz, requiring only 6 clock cycles to accomplish a conversion. The ADC exploits three comparators to resolve two bits during each conversion cycle. To avoid the severe performance degradation due to offset mismatches...
In this paper, we present the design and the characterization of a wide-dynamic-range interface circuit for resistive gas-sensors able to operate without calibration. The circuit is based on resistance-to-frequency conversion, which guarantees low complexity. The state-of-the-art of this measurement method has been improved first by separating the resistance value controlled oscillator circuit (RCO)...
In this paper we present a low-cost CMOS wide-dynamic-range integrated interface circuit for indoor resistive gas sensors based on an enhanced oscillator approach. The state of the art of this measurement method has been improved biasing the sensor with a constant voltage, thus increasing linearity by separating the oscillator circuit from the sensing device. Another important novelty of this circuit...
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