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Paper Abstract and Keywords
Presentation 2023-09-15 14:50
Dual conversion gain scheme for small pixel CMOS Image Sensor
Ayaka Banno, Kazuki Tatsuta, Ai Otani, Shunsuke Okura (Ritsumeikan Univ.), Ken Miyauchi, Yuki Morikawa, Sangman Han, Hideki Owada, Isao Takayanagi (Brillnics)
Abstract (in Japanese) (See Japanese page) 
(in English) High Dynamic Range (HDR) CMOS image sensors are required for the use under extreme-illminated environments such as outdoors. Besides, for the Trillion Sensors Univers, low-cost image sensors are also required for mass-production. However, conventional Dual Conversion Gain (DCG) CMOS image sensor pixel consists of 6 transistors, which results in large pixel size and the increase of the chip cost. Therefore, we investigated a HDR pixel by performing two readouts consists of 4 transistors pixel, which is suitable for small-area pixels. The photoelectrons integrated in the pixel is first readout only with floating diffusion node FD at high conversion gain (HCG) and is then readout with the FD and photodiode (PD) at low conversion gain (LCG). Although the linearity was reduced from conventional readout scheme, a 2.2dB higher dynamic range was achieved.
Keyword (in Japanese) (See Japanese page) 
(in English) CMOS image sensor / HDR / 4T pixel / small area / DCG / / /  
Reference Info. ITE Tech. Rep., vol. 47, no. 27, IST2023-43, pp. 33-36, Sept. 2023.
Paper # IST2023-43 
Date of Issue 2023-09-08 (IST) 
ISSN Online edition: ISSN 2424-1970
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Conference Information
Committee IST  
Conference Date 2023-09-15 - 2023-09-15 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To IST 
Conference Code 2023-09-IST 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Dual conversion gain scheme for small pixel CMOS Image Sensor 
Sub Title (in English)  
Keyword(1) CMOS image sensor  
Keyword(2) HDR  
Keyword(3) 4T pixel  
Keyword(4) small area  
Keyword(5) DCG  
1st Author's Name Ayaka Banno  
1st Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
2nd Author's Name Kazuki Tatsuta  
2nd Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
3rd Author's Name Ai Otani  
3rd Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
4th Author's Name Shunsuke Okura  
4th Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
5th Author's Name Ken Miyauchi  
5th Author's Affiliation Brillnics Inc. (Brillnics)
6th Author's Name Yuki Morikawa  
6th Author's Affiliation Brillnics Inc. (Brillnics)
7th Author's Name Sangman Han  
7th Author's Affiliation Brillnics Inc. (Brillnics)
8th Author's Name Hideki Owada  
8th Author's Affiliation Brillnics Inc. (Brillnics)
9th Author's Name Isao Takayanagi  
9th Author's Affiliation Brillnics Inc. (Brillnics)
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Speaker Author-1 
Date Time 2023-09-15 14:50:00 
Presentation Time 20 minutes 
Registration for IST 
Paper # IST2023-43 
Volume (vol) vol.47 
Number (no) no.27 
Page pp.33-36 
Date of Issue 2023-09-08 (IST) 

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