Low-Power Photoplethysmogram Acquisition Integrated Circuit with Robust Light Interference Compensation
To overcome light interference, including a large DC offset and ambient light variation, a robust photoplethysmogram (PPG) readout chip is fabricated using a 0.13-μm complementary metal–oxide–semiconductor (CMOS) process. Against the large DC offset, a saturation detection and current feedback circu...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2015-12-01
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| Series: | Sensors |
| Subjects: | |
| Online Access: | http://www.mdpi.com/1424-8220/16/1/46 |
| _version_ | 1828351855247228928 |
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| author | Jongpal Kim Jihoon Kim Hyoungho Ko |
| author_facet | Jongpal Kim Jihoon Kim Hyoungho Ko |
| author_sort | Jongpal Kim |
| collection | DOAJ |
| description | To overcome light interference, including a large DC offset and ambient light variation, a robust photoplethysmogram (PPG) readout chip is fabricated using a 0.13-μm complementary metal–oxide–semiconductor (CMOS) process. Against the large DC offset, a saturation detection and current feedback circuit is proposed to compensate for an offset current of up to 30 μA. For robustness against optical path variation, an automatic emitted light compensation method is adopted. To prevent ambient light interference, an alternating sampling and charge redistribution technique is also proposed. In the proposed technique, no additional power is consumed, and only three differential switches and one capacitor are required. The PPG readout channel consumes 26.4 μW and has an input referred current noise of 260 pArms. |
| first_indexed | 2024-04-14T01:46:06Z |
| format | Article |
| id | doaj.art-c229dc570fb2476085e647fc14d179bd |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-14T01:46:06Z |
| publishDate | 2015-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-c229dc570fb2476085e647fc14d179bd2022-12-22T02:19:33ZengMDPI AGSensors1424-82202015-12-011614610.3390/s16010046s16010046Low-Power Photoplethysmogram Acquisition Integrated Circuit with Robust Light Interference CompensationJongpal Kim0Jihoon Kim1Hyoungho Ko2Samsung Electronics Inc., Suwon 16678, KoreaChungnam National University, Daejeon 34134, KoreaChungnam National University, Daejeon 34134, KoreaTo overcome light interference, including a large DC offset and ambient light variation, a robust photoplethysmogram (PPG) readout chip is fabricated using a 0.13-μm complementary metal–oxide–semiconductor (CMOS) process. Against the large DC offset, a saturation detection and current feedback circuit is proposed to compensate for an offset current of up to 30 μA. For robustness against optical path variation, an automatic emitted light compensation method is adopted. To prevent ambient light interference, an alternating sampling and charge redistribution technique is also proposed. In the proposed technique, no additional power is consumed, and only three differential switches and one capacitor are required. The PPG readout channel consumes 26.4 μW and has an input referred current noise of 260 pArms.http://www.mdpi.com/1424-8220/16/1/46photoplethysmogramtransimpedance amplifierambient light cancellationautomatic offset compensationautomatic emitted light compensation |
| spellingShingle | Jongpal Kim Jihoon Kim Hyoungho Ko Low-Power Photoplethysmogram Acquisition Integrated Circuit with Robust Light Interference Compensation Sensors photoplethysmogram transimpedance amplifier ambient light cancellation automatic offset compensation automatic emitted light compensation |
| title | Low-Power Photoplethysmogram Acquisition Integrated Circuit with Robust Light Interference Compensation |
| title_full | Low-Power Photoplethysmogram Acquisition Integrated Circuit with Robust Light Interference Compensation |
| title_fullStr | Low-Power Photoplethysmogram Acquisition Integrated Circuit with Robust Light Interference Compensation |
| title_full_unstemmed | Low-Power Photoplethysmogram Acquisition Integrated Circuit with Robust Light Interference Compensation |
| title_short | Low-Power Photoplethysmogram Acquisition Integrated Circuit with Robust Light Interference Compensation |
| title_sort | low power photoplethysmogram acquisition integrated circuit with robust light interference compensation |
| topic | photoplethysmogram transimpedance amplifier ambient light cancellation automatic offset compensation automatic emitted light compensation |
| url | http://www.mdpi.com/1424-8220/16/1/46 |
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