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This paper presents the design and implementation of a 46-kS/s CMOS switch-capacitor dual-mode capacitive sensor interface circuit for inkjet-printed capacitive humidity sensors. The specifications of the interface circuit, which includes a capacitance-to-voltage (C2V) converter combined with an analog-to-digital converter (ADC), are optimized at system level, emphasizing the C2V operation followed...
In this work, a passive UHF RFID system for capacitive sensor applications is presented. The design of the base station and the passive RFID tag is explained. The tag consists of an inductively-fed, meandered dipole antenna and an IC that contains the remote powering, communication, and sensor interface circuitry. The rectifier in the tag is a highly efficient differential rectifier with self threshold...
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