전기학회논문지 (The Transactions of The Korean Institute of Electrical Engineers)

  • 제61권12호
  • /
  • Pages.1886-1891
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  • 2012
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  • 1975-8359(pISSN)
  • /
  • 2287-4364(eISSN)
대한전기학회 (The Korean Institute of Electrical Engineers)
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마이크로 볼로미터 초점면 배열에서 전기-열적 피드백 현상이 신호에 미치는 영향

Electro-thermal Feedback Effects on the Signal in a Pulse Voltage Biased μ-bolometer Focal Plane Array

  • 박승만 (호서대학교 국방과학기술학과) ;
  • 한승오 (호서대학교 융합기술연구소)
  • 투고 : 2012.10.10
  • 심사 : 2012.11.16
  • 발행 : 2012.12.01
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초록

In this paper, the analytical models for the electrothermal feedback of a ${\mu}$-bolometer focal plane array(FPA) are proposed and applied to the conceptually designed FPA to investigate the electrothermal feedback effect on bolometer FPA signal. The temperature and resistance change of the ${\mu}$-bolometer by the electrothermal feedback(ETF) model are increased upto 20 and 35.7 % of those of no feedback case, respectively, while those by the effective thermal conductance(ETC) model increased 8.5 and 15.1 %. The integration current and output voltage of a CTIA used as an column amplifier of FPA are also increased upto 41.6 and 32.4 % by the ETF model, while increased upto 17.2 and 13.5 % by the ETC model. The proposed models give more accurate temperature change, accordingly larger signal than no feedback considering case. Electrothermal feedback effect should be considered to design a high performance and high density ${\mu}$-bolometer FPA. The proposed models are very useful to investigate the transient thermal analysis, also considered to be useful to predict the responsivity and dynamic range of ${\mu}$-bolometer FPAs.

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참고문헌

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