Low power pixel-level ADC readout circuit for uncooled infrared imaging systems = 비냉각형 적외선 영상센서를 위한 저전력 픽셀단위 데이터변환 신호취득회로에 관한 연구

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 707
  • Download : 0
A new readout integrated circuit is developed for application in an amorphous silicon-based microbolometer array with a pixel pitch of 35 μm. The proposed circuit lowers the power dissipation for a pixel-level analog-to-digital converter (ADC), which uses a comparator and a counter for its data conversion. The infrared current of a microbolometer is proportional to the resistivity changes of the microbolometer. Thus, the required number of counter operations for the pixel ADC can be determined according to the microbolometer current variation. The counting number precisely determines how much infrared flux is absorbed. A 14 bit counter should normally be used for the pixel ADC for this kind of operation. However, when the proposed current skimming scheme is adopted, the total bits for the counter in the pixel ADC can be reduced to 12 bits. Due to the proposed mechanism, the required operational speed of the comparator can lower than that of a conventional circuit. Consequently, the overall power dissipation in the comparator and counter is less than that of a conventional structure. This low power approach is very suitable in the pixel-level ADCs of microbolometers.
Advisors
Lee, Hee-Chulresearcher이희철researcher
Description
한국과학기술원 : 전기및전자공학전공,
Publisher
한국과학기술원
Issue Date
2009
Identifier
308870/325007  / 020073606
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 전기및전자공학전공, 2009.2, [ ix, 55 p. ]

Keywords

readout circuit; pixel-level ADC; microbolometer; low power dissipation; 신호취득회로; 픽셀단위 데이터변환; 마이크로볼로미터; 저전력소모; readout circuit; pixel-level ADC; microbolometer; low power dissipation; 신호취득회로; 픽셀단위 데이터변환; 마이크로볼로미터; 저전력소모

URI
http://hdl.handle.net/10203/38749
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=308870&flag=dissertation
Appears in Collection
EE-Theses_Master(석사논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0