Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Dynamic range expansion of active pixel sensor with output voltage feedback

출력 전압 피드백을 통한 능동 화소 센서의 동작 범위 확장

  • Seo, Min-Woong (School of Electrical Engineering and Computer Science, Kyungpook National University) ;
  • Seo, Sang-Ho (School of Electrical Engineering and Computer Science, Kyungpook National University) ;
  • Kong, Jae-Sung (School of Electrical Engineering and Computer Science, Kyungpook National University) ;
  • Shin, Jang-Kyoo (School of Electrical Engineering and Computer Science, Kyungpook National University)
  • 서민웅 (경북대학교 전자전기컴퓨터학부) ;
  • 서상호 (경북대학교 전자전기컴퓨터학부) ;
  • 공재성 (경북대학교 전자전기컴퓨터학부) ;
  • 신장규 (경북대학교 전자전기컴퓨터학부)
  • Published : 2009.07.31
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Abstract

In this paper, a wide dynamic range active pixel sensor(APS) with output voltage feedback structure has been designed by a 2-poly 4-metal 0.35 $\mu$m standard CMOS technology. We presented a novel APS with output voltage feedback, which exhibits a wide dynamic range. The dynamic range increases at the cost of an additional diode and an additional MOSFET. The output voltage feedback structure enables the control of the output voltage level by itself, as incident light power varies. It is confirmed that the light level which the output voltage level of proposed APS is saturated is about 120,000 lux, which is higher than that of a conventional 3-transistor APS.

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References

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