| Autor: |
Shanthala Lakshminarayana, Younghun Park, Hyusim Park, Sungyong Jung |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
IEEE Access, Vol 10, Pp 45726-45735 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2169-3536 |
| DOI: |
10.1109/ACCESS.2022.3170486 |
| Popis: |
This paper aims at designing a compact readout system for chemiresistive sensor array with high speed and high accuracy. The proposed scheme is based on Resistance-to-Voltage (R-V) conversion and targets high density wide ranged chemiresistive sensor, with input resistance range of 1 $\text{K}\Omega $ - 1 $\text{M}\Omega $ and 0.1% sensitivity. The proposed approach uses Adaptive Reference Resistor Tuning (ARRT) technique implemented with a digital variable potentiometer to achieve a high accuracy without sacrificing the dynamic range and the speed. The system is implemented on a printed circuit board with a microcontroller and a 16-bit Analog-to-Digital Converter (ADC), and it has a compact dimension of 10 cm $\times6$ cm, which is suitable for portable applications. The readout system works with a 5 V power supply, and the overall system power consumption is 150 mW. The system is designed to interface with a 118 sensor array and the experimental results achieved a satisfactory accuracy of 0.88%, as well as a measuring speed of 8.5 ms per sensor. Compared with existing approaches, our work targets a high density wide ranged chemiresistive sensor array and demonstrated high accuracy, high speed with the lowest circuit complexity, which is the novelty of this work. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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