Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Read-Out Integrated Circuit of Colorimetry-Based Optical Sensor for Eutrophication Analysis

수생태계 부영양화 분석을 위한 비색법 기반의 광학식 센서 신호처리회로(ROIC)구현

  • Koo, Seong Mo (School of Electronics Engineering College of IT Engineering) ;
  • Jung, Dong Geon (School of Electronics Engineering College of IT Engineering) ;
  • Choi, Young Chan (School of Electronics Engineering College of IT Engineering) ;
  • Kim, Kyung-Kyoo (HuStar ICT Innovation Uviversity Agency) ;
  • Kong, Seong Ho (School of Electronics Engineering College of IT Engineering)
  • 구성모 (경북대학교 IT대학전자공학부) ;
  • 정동건 (경북대학교 IT대학전자공학부) ;
  • 최영찬 (경북대학교 IT대학전자공학부) ;
  • 김경규 (경북대학교 HuStar ICT 혁신대학사업단) ;
  • 공성호 (경북대학교 IT대학전자공학부)
  • Received : 2020.07.24
  • Accepted : 2020.07.30
  • Published : 2020.07.31
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Abstract

In this study, a read-out integrated circuit (ROIC) that can be applied to a colorimetry-based optical sensor for analyzing total phosphorus and total nitrogen was developed and characterized. The proposed ROIC minimizes the effect on temperature fluctuation, improves sensitivity, and extends the dynamic range by utilizing a dual optical path and feedback control circuit. Using a dual optical path makes it possible to calibrate the output signal of the optical sensor automatically, along with the temperature fluctuation. The calibrated voltage is fed back into the measurement stage; thus, the output current of the measurement is adaptively controlled. As a result, the sensitivity and dynamic range of the proposed ROIC are improved. Finally, a total-phosphorus analysis was conducted by utilizing the ROIC. The ROIC was found to operate stably over a wide temperature range.

Keywords

References

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