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Author

Kim, Jae Joon
Convergence Semiconductor Design Lab (CSDL)
Research Interests
  • Integrated circuits and systems, smart sensor interfaces, wearable healthcare systems, IoT & automotive electronics, mixed-mode circuits

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A Three-Step Resolution-Reconfigurable Hazardous Multi-Gas Sensor Interface for Wireless Air-Quality Monitoring Applications

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Title
A Three-Step Resolution-Reconfigurable Hazardous Multi-Gas Sensor Interface for Wireless Air-Quality Monitoring Applications
Author
Choi, SubinPark, KyeonghwanLee, SeungwookLim, YeongjinOh, ByungjooChae, Hee YoungPark, Chan SamShin, HeungjooKim, Jae Joon
Keywords
heterogeneous gas; multi-sensor; reconfigurable resolution; readout integrated circuit (ROIC); wireless sensor interface; microelectromechanical (MEMS) device; suspended nanowire
Issue Date
201803
Publisher
MDPI AG
Citation
SENSORS, v.18, no.3, pp.761 -
Abstract
This paper presents a resolution-reconfigurable wide-range resistive sensor readout interface for wireless multi-gas monitoring applications that displays results on a smartphone. Three types of sensing resolutions were selected to minimize processing power consumption, and a dual-mode front-end structure was proposed to support the detection of a variety of hazardous gases with wide range of characteristic resistance. The readout integrated circuit (ROIC) was fabricated in a 0.18 μm CMOS process to provide three reconfigurable data conversions that correspond to a low-power resistance-to-digital converter (RDC), a 12-bit successive approximation register (SAR) analog-to-digital converter (ADC), and a 16-bit delta-sigma modulator. For functional feasibility, a wireless sensor system prototype that included in-house microelectromechanical (MEMS) sensing devices and commercial device products was manufactured and experimentally verified to detect a variety of hazardous gases.
URI
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DOI
http://dx.doi.org/10.3390/s18030761
ISSN
1424-8220
Appears in Collections:
MNE_Journal Papers
ECE_Journal Papers
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