A Chemoresistive Gas Sensor Readout Integrated Circuit With Sensor Offset Cancellation Technique
This study proposes a chemoresistive gas sensor readout integrated circuit (ROIC) with a simple and effective scheme for tracking and canceling the sensor offset value. Before reading out the gas sensor, the proposed ROIC dynamically updates a of analog-to-digital (A/D) reference range suitable to t...
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| Format: | Article |
| Language: | English |
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IEEE
2023-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/10213990/ |
| _version_ | 1797741528519540736 |
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| author | Jun-Nyeong Kim Hyeon-June Kim |
| author_facet | Jun-Nyeong Kim Hyeon-June Kim |
| author_sort | Jun-Nyeong Kim |
| collection | DOAJ |
| description | This study proposes a chemoresistive gas sensor readout integrated circuit (ROIC) with a simple and effective scheme for tracking and canceling the sensor offset value. Before reading out the gas sensor, the proposed ROIC dynamically updates a of analog-to-digital (A/D) reference range suitable to the gas sensor offset, enabling accurate A/D conversion within the gas sensor’s dynamic range (DR). Therefore, this approach eliminates the need for additional complex circuitry or compensation algorithms, allowing the ROIC to extract the desired amount of change effectively. As a result, the overall DR of the gas sensor system is maximized. In addition, the proposed ROIC maintains compatibility with the existing system environment while effectively alleviating the physical limitations of the gas sensor. In terms of commercialization, the effectiveness and feasibility of the proposed ROIC, based on a single-slope A/D converter structure as a readout technique, have been verified. A prototype ROIC was fabricated employing a 180-nm standard CMOS process, exhibiting a total power consumption of 0.5 mW with a conversion rate of 62.5 kSPS. The integrated noise within the range of 1 Hz to 2 kHz was <inline-formula> <tex-math notation="LaTeX">$10.1 ~\mu \text{V}_{\mathrm {RMS}}$ </tex-math></inline-formula>, corresponding to a DR of 137 dB. Further, the maximum integral non-linearity (INL) was −72.24 dB. The proposed ROIC effectively minimizes sensor offset scattering within 1 LSB of the A/D reference full scale, enhancing performance and feasibility in gas sensor applications. |
| first_indexed | 2024-03-12T14:28:01Z |
| format | Article |
| id | doaj.art-16ff2ee729d545fd92c98ed2fa382c0a |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-03-12T14:28:01Z |
| publishDate | 2023-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-16ff2ee729d545fd92c98ed2fa382c0a2023-08-17T23:00:17ZengIEEEIEEE Access2169-35362023-01-0111854058541310.1109/ACCESS.2023.330384210213990A Chemoresistive Gas Sensor Readout Integrated Circuit With Sensor Offset Cancellation TechniqueJun-Nyeong Kim0Hyeon-June Kim1https://orcid.org/0000-0002-0516-5811Department of Semiconductor Engineering, Seoul National University of Science and Technology, Seoul, South KoreaDepartment of Semiconductor Engineering, Seoul National University of Science and Technology, Seoul, South KoreaThis study proposes a chemoresistive gas sensor readout integrated circuit (ROIC) with a simple and effective scheme for tracking and canceling the sensor offset value. Before reading out the gas sensor, the proposed ROIC dynamically updates a of analog-to-digital (A/D) reference range suitable to the gas sensor offset, enabling accurate A/D conversion within the gas sensor’s dynamic range (DR). Therefore, this approach eliminates the need for additional complex circuitry or compensation algorithms, allowing the ROIC to extract the desired amount of change effectively. As a result, the overall DR of the gas sensor system is maximized. In addition, the proposed ROIC maintains compatibility with the existing system environment while effectively alleviating the physical limitations of the gas sensor. In terms of commercialization, the effectiveness and feasibility of the proposed ROIC, based on a single-slope A/D converter structure as a readout technique, have been verified. A prototype ROIC was fabricated employing a 180-nm standard CMOS process, exhibiting a total power consumption of 0.5 mW with a conversion rate of 62.5 kSPS. The integrated noise within the range of 1 Hz to 2 kHz was <inline-formula> <tex-math notation="LaTeX">$10.1 ~\mu \text{V}_{\mathrm {RMS}}$ </tex-math></inline-formula>, corresponding to a DR of 137 dB. Further, the maximum integral non-linearity (INL) was −72.24 dB. The proposed ROIC effectively minimizes sensor offset scattering within 1 LSB of the A/D reference full scale, enhancing performance and feasibility in gas sensor applications.https://ieeexplore.ieee.org/document/10213990/Analog cancellation techniquegas sensorreadout integrated circuit (ROIC)sensor offset trackingslow response gas sensing system |
| spellingShingle | Jun-Nyeong Kim Hyeon-June Kim A Chemoresistive Gas Sensor Readout Integrated Circuit With Sensor Offset Cancellation Technique IEEE Access Analog cancellation technique gas sensor readout integrated circuit (ROIC) sensor offset tracking slow response gas sensing system |
| title | A Chemoresistive Gas Sensor Readout Integrated Circuit With Sensor Offset Cancellation Technique |
| title_full | A Chemoresistive Gas Sensor Readout Integrated Circuit With Sensor Offset Cancellation Technique |
| title_fullStr | A Chemoresistive Gas Sensor Readout Integrated Circuit With Sensor Offset Cancellation Technique |
| title_full_unstemmed | A Chemoresistive Gas Sensor Readout Integrated Circuit With Sensor Offset Cancellation Technique |
| title_short | A Chemoresistive Gas Sensor Readout Integrated Circuit With Sensor Offset Cancellation Technique |
| title_sort | chemoresistive gas sensor readout integrated circuit with sensor offset cancellation technique |
| topic | Analog cancellation technique gas sensor readout integrated circuit (ROIC) sensor offset tracking slow response gas sensing system |
| url | https://ieeexplore.ieee.org/document/10213990/ |
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