| 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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