| Paper Abstract and Keywords |
| Presentation |
2018-11-28 16:30
[Poster Presentation]
Averaging Pixel Current Calibration Algorithm for Reducing Fixed Pattern Noise in the Bolometer-Type Uncooled Infrared Image Sensor
Sang-Hwan Kim, Byoung-Soo Choi, Jimin Lee, Junwoo Lee, Jewon Lee (Kyungpook National Univ.), Jae-Hyoun Park, Kyoung-Il Lee (KETI), Jang-Kyoo Shin (Kyungpook National Univ.) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
In this paper, we propose an averaging pixel current calibration algorithm for reducing fixed pattern noise (FPN) in the bolometer-type uncooled infrared image sensor. The averaging pixel current calibration algorithm is implemented by using active pixel, reference pixel, and calibration circuit. Active pixel and reference pixel have been integrated using on-chip polysilicon resistors. Resistance variation among active pixels due to process variation causes FPN. The principle of algorithm is that the dark current of reference pixel array is subtracted by the dark current of each active pixel. Thereafter, the subtracted current is converted into the voltage and the voltage is related to the pixel resistance value. Calibration circuit is used to adjust the calibration current. After calibration, nanoampere current is output with small variation. The proposed averaging pixel current calibration algorithm is implemented by a chip which is composed of a 4 by 16 pixel array, calibration circuit, average current generators, and readout circuits. The chip was fabricated by using standard 0.35-μm CMOS process and its performance was evaluated. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
pixel current calibration algorithm / uncooled infrared image sensor / bolometer / fixed pattern noise / / / / |
| Reference Info. |
ITE Tech. Rep., vol. 42, no. 40, IST2018-78, pp. 39-40, Nov. 2018. |
| Paper # |
IST2018-78 |
| Date of Issue |
2018-11-21 (IST) |
| ISSN |
Print edition: ISSN 1342-6893 Online edition: ISSN 2424-1970 |
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