A 1.2V 8.3nJ energy-efficient CMOS humidity sensor for RFID applications

@article{Tan2012A18,
  title={A 1.2V 8.3nJ energy-efficient CMOS humidity sensor for RFID applications},
  author={Zhichao Tan and Youngcheol Chae and Roel Daamen and Aurelie Humbert and Youri Ponomarev and Michiel A. P. Pertijs},
  journal={2012 Symposium on VLSI Circuits (VLSIC)},
  year={2012},
  pages={24-25}
}
A CMOS fully-integrated humidity sensor for a RFID sensor platform has been realized in 0.16μm CMOS technology. It consists of a top-metal finger capacitor, covered by a humidity-sensitive polyimide layer, and an energy-efficient inverter-based capacitance-to-digital converter (CDC). Measurements show that the CDC performs a 12.5-bit conversion in 0.8ms while consuming only 8.6μA from a 1.2V supply. Together with the co-integrated humidity sensor, this translates into a resolution of 0.05% RH… CONTINUE READING
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