A Three-Step Resolution-Reconfigurable Hazardous Multi-Gas Sensor Interface for Wireless Air-Quality Monitoring Applications
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 str...
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| Veröffentlicht in: | Sensors (Basel, Switzerland) Switzerland), 2018-03, Vol.18 (3), p.761 |
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| container_title | Sensors (Basel, Switzerland) |
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| creator | Choi, Subin Park, Kyeonghwan Lee, Seungwook Lim, Yeongjin Oh, Byungjoo Chae, Hee Young Park, Chan Sam Shin, Heugjoo Kim, Jae Joon |
| description | 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. |
| doi_str_mv | 10.3390/s18030761 |
| format | Article |
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| source | MDPI - Multidisciplinary Digital Publishing Institute; DOAJ Directory of Open Access Journals; EZB-FREE-00999 freely available EZB journals; PubMed Central; Free Full-Text Journals in Chemistry |
| subjects | Air monitoring Analog to digital conversion Analog to digital converters CMOS Gas sensors Integrated circuits Microelectromechanical systems Sensors Smartphones |
| title | A Three-Step Resolution-Reconfigurable Hazardous Multi-Gas Sensor Interface for Wireless Air-Quality Monitoring Applications |
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