(A) study on microbolometer readout circuit with high signal-to-noise ratio by using multiple integration method = 다중 적분 방식을 사용하여 높은 신호대잡음비를 갖는 마이크로 볼로미터 신호취득회로에 관한 연구

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In this thesis, a readout integrated Circuit (ROIC) for application in an amorphous silicon based micro-bolometer array is developed. This readout circuit was fabricated using a $0.35-\microm$ CMOS process for LWIR ($8-\microm~14-\microm$) IR detector array. The proposed circuit uses multiple integration method for high signal-to-noise ratio (SNR). The signal from each pixel is repeatedly sampled into the integration capacitors that are shared one capacitor with two pixels. After integration, the signal output and summed into summing capacitors with voltage skimming. At last the summed signals are output into memory that is out of ROIC chip. These procedures continue for n read cycles during frame time periodically. This method adopted in proposed ROIC provides more improved SNR by 2.91 times than conventional ROIC. Consequently, the proposed readout circuit that uses the multiple integration method has higher SNR than the conventional readout circuit that use the general integration method when these circuits are adopted the same microbolometer. This proposed readout circuit is very suitable in the high SNR IR image applications.
Advisors
Lee, Hee-Chulresearcher이희철researcher
Description
한국과학기술원 : 전기 및 전자공학과,
Publisher
한국과학기술원
Issue Date
2010
Identifier
419103/325007  / 020083196
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 전기 및 전자공학과, 2010.2, [ viii, 58 p. ]

Keywords

High SNR; multiple integration; ROIC; microbolometer; switched-capacitor; 스위치드캐패시터; 신호대잡음비; 다중적분; 신호취득회로; 마이크로볼로미터

URI
http://hdl.handle.net/10203/36568
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=419103&flag=dissertation
Appears in Collection
EE-Theses_Master(석사논문)
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