Abstract
This paper describes an energy-efficient resistor-to-digital converter (RDC) for detecting benzene, toluene, ethylbenzene and xylene (BTEX). The sensor's selectivity is adjusted by the different heat levels, thereby detecting the BTEX with a single-R sensor. The sensor is directly digitized by an energy-efficient RDC based on a continuous-time delta-sigma ADC. The proposed RDC achieves a better energy-efficiency by processing the signal in current domain. The prototype chip implemented in a 0.11-μm CMOS consumes only 95μW from a 1.5-V supply. It achieves a resistance resolution of 863mΩ with a 0.5-ms measurement time. This corresponds to a gas resolution of 0.06ppb and an energy per measurement of 47.5nJ. This work is fully verified through the BTEX measurements.
| Original language | English |
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| Title of host publication | 2021 Symposium on VLSI Circuits, VLSI Circuits 2021 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| ISBN (Electronic) | 9784863487796 |
| DOIs | |
| Publication status | Published - 2021 Jun 13 |
| Event | 35th Symposium on VLSI Circuits, VLSI Circuits 2021 - Virutal, Online Duration: 2021 Jun 13 → 2021 Jun 19 |
Publication series
| Name | IEEE Symposium on VLSI Circuits, Digest of Technical Papers |
|---|---|
| Volume | 2021-June |
Conference
| Conference | 35th Symposium on VLSI Circuits, VLSI Circuits 2021 |
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| City | Virutal, Online |
| Period | 21/6/13 → 21/6/19 |
Bibliographical note
Publisher Copyright:© 2021 JSAP.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering
