Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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A Study on the Design of a ROIC for Uncooled Bolometer Thermal Image Sensor Using Reference Resistor Compensation

기준저항 보상회로를 이용한 비냉각형 볼로미터 검출회로의 설계에 관한 연구

  • Yu, Seung-Woo (Semiconductor & CAD Lab., Department of Electrical Engineering, Korea Univ.) ;
  • Kwak, Sang-Hyeon (Semiconductor & CAD Lab., Department of Electrical Engineering, Korea Univ.) ;
  • Jung, Eun-Sik (Semiconductor & CAD Lab., Department of Electrical Engineering, Korea Univ.) ;
  • Hwang, Sang-Jun (Semiconductor & CAD Lab., Department of Electrical Engineering, Korea Univ.) ;
  • Sung, Man-Young (Semiconductor & CAD Lab., Department of Electrical Engineering, Korea Univ.)
  • 유승우 (고려대학교 전기공학과 반도체 및 CAD 연구실) ;
  • 곽상현 (고려대학교 전기공학과 반도체 및 CAD 연구실) ;
  • 정은식 (고려대학교 전기공학과 반도체 및 CAD 연구실) ;
  • 황상준 (고려대학교 전기공학과 반도체 및 CAD 연구실) ;
  • 성만영 (고려대학교 전기공학과 반도체 및 CAD 연구실)
  • Published : 2008.06.19
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Abstract

As infrared light is radiated, the CMOS Readout IC (ROIC) for the microbolometer type infrared sensor detects voltage or current when the resistance value in the bolometer sensor varies. One of the serious problems in designing the ROIC is that resistances in the bolometer and reference resistor have process variation. This means that each pixel does not have the same resistance, causing serious fixed pattern noise problems in sensor operations. In this paper, Reference resistor compensation technique was proposed. This technique is to compensate the reference resistance considering the process variation, and it has the same reference resistance value as a bolometer cell resistance by using a comparator and a cross coupled latch.

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