한국전기전자재료학회:학술대회논문집 (Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference)
- 한국전기전자재료학회 2009년도 하계학술대회 논문집
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- Pages.7-8
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- 2009
A Study on the Design of a Current Type ROIC for Uncooled Bolometer Thermal Image Sensor Using Correlated Double Sampling
- Kwak, Sang-Hyeon (Department of Electrical Engineering, Korea University) ;
- Lee, Po (R&D. LAB, OCAS) ;
- Jung, Eun-Sik (Department of Electrical Engineering, Korea University) ;
- Sung, Man-Young (Department of Electrical Engineering, Korea University)
- 발행 : 2009.06.18
초록
In the presence of infrared light, a CMOS Readout IC (ROIC) for a microbolometer typed infrared sensor detects the voltage or current that is caused by the changing in resistance in the bolometer sensor. A serious problem in designing the ROIC is how the value of the bolometer and reference resistors vary because of variations in manufacturing process. Since different pixel have different, resistance values, sensor operations must contend with fixed pattern noise (FPN) problems. In this paper, we propose a novel technique to compensate for the fluctuation in reference resistance by tiling into account the process variation. By using constant current source basing and correlated double sampling, we solved FPN.