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Paper Abstract and Keywords
Presentation 2022-12-12 14:20
[Poster Presentation] An area efficient readout circuit for CMOS Image Sensor With Lateral Overflow Integration Capacitor
Ai Otani, Hiroaki Ogawa (Ritsumeikan Univ.), Ken Miyauchi, Sangman Han, Hideki Owada, Isao Takayanagi (Brillnics), Shunsuke Okura (Ritsumeikan Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) A lateral overflow integration capacitor (LOFIC) CMOS image sensor (CIS) can realize high dynamic range (HDR) imaging with low conversion gain (LCG) signal for large full well capacity and with high conversion gain (HCG) signal for small dark noise. However, the LOFIC CIS requires 2-channel readout circuits for LCG and HCG signals whose signal polarities are inverted. In order to provide cost efficient LOFIC CIS, a 1-channel readout circuit which can process both HCG and LCG signals is presented in this paper. The combination circuit of an inverting amplifier for HCG signal and a non-inverting attenuator for LCG signal can reduce the area of the readout circuit by half compared to the conventional 2-channel readout circuit. The readout circuit is fabricated with a 0.18µm CMOS process with MIM capacitor, achieving the readout noise of 130µVrms in the HCG mode and the signal range 1.3V in the LCG mode.
Keyword (in Japanese) (See Japanese page) 
(in English) CMOS image sensor / LOFIC / HDR / readout circuit / small area / / /  
Reference Info. ITE Tech. Rep., vol. 46, no. 41, IST2022-53, pp. 41-42, Dec. 2022.
Paper # IST2022-53 
Date of Issue 2022-12-05 (IST) 
ISSN Print edition: ISSN 1342-6893    Online edition: ISSN 2424-1970
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Conference Information
Committee IST  
Conference Date 2022-12-12 - 2022-12-13 
Place (in Japanese) (See Japanese page) 
Place (in English) Sanaru Hall 
Topics (in Japanese) (See Japanese page) 
Topics (in English) 5th International Workshop on Image Sensors and Imaging Systems (IWISS2022) 
Paper Information
Registration To IST 
Conference Code 2022-12-IST 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) An area efficient readout circuit for CMOS Image Sensor With Lateral Overflow Integration Capacitor 
Sub Title (in English)  
Keyword(1) CMOS image sensor  
Keyword(2) LOFIC  
Keyword(3) HDR  
Keyword(4) readout circuit  
Keyword(5) small area  
1st Author's Name Ai Otani  
1st Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
2nd Author's Name Hiroaki Ogawa  
2nd Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
3rd Author's Name Ken Miyauchi  
3rd Author's Affiliation Brillnics Japan Inc. (Brillnics)
4th Author's Name Sangman Han  
4th Author's Affiliation Brillnics Japan Inc. (Brillnics)
5th Author's Name Hideki Owada  
5th Author's Affiliation Brillnics Japan Inc. (Brillnics)
6th Author's Name Isao Takayanagi  
6th Author's Affiliation Brillnics Japan Inc. (Brillnics)
7th Author's Name Shunsuke Okura  
7th Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
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Speaker Author-1 
Date Time 2022-12-12 14:20:00 
Presentation Time 90 minutes 
Registration for IST 
Paper # IST2022-53 
Volume (vol) vol.46 
Number (no) no.41 
Page pp.41-42 
Date of Issue 2022-12-05 (IST) 

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