Fixed Pattern Noise Reduction and Linearity Improvement in Time-Mode CMOS Image Sensors
In the paper, a digital clock stopping technique for gain and offset correction in time-mode analog-to-digital converters (ADCs) has been proposed. The technique is dedicated to imagers with massively parallel image acquisition working in the time mode where compensation of dark signal non-uniformit...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-10-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/20/20/5921 |
| _version_ | 1797550412134350848 |
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| author | Miron Kłosowski Yichuang Sun |
| author_facet | Miron Kłosowski Yichuang Sun |
| author_sort | Miron Kłosowski |
| collection | DOAJ |
| description | In the paper, a digital clock stopping technique for gain and offset correction in time-mode analog-to-digital converters (ADCs) has been proposed. The technique is dedicated to imagers with massively parallel image acquisition working in the time mode where compensation of dark signal non-uniformity (DSNU) as well as photo-response non-uniformity (PRNU) is critical. Fixed pattern noise (FPN) reduction has been experimentally validated using 128-pixel CMOS imager. The reduction of the PRNU to about 0.5 LSB has been achieved. Linearity improvement technique has also been proposed, which allows for integral nonlinearity (INL) reduction to about 0.5 LSB. Measurements confirm the proposed approach. |
| first_indexed | 2024-03-10T15:28:54Z |
| format | Article |
| id | doaj.art-b74b3831d2514ecba03e40cc3f040ddd |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T15:28:54Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-b74b3831d2514ecba03e40cc3f040ddd2023-11-20T17:52:11ZengMDPI AGSensors1424-82202020-10-012020592110.3390/s20205921Fixed Pattern Noise Reduction and Linearity Improvement in Time-Mode CMOS Image SensorsMiron Kłosowski0Yichuang Sun1Faculty of Electronics, Telecommunications and Informatics, Gdańsk University of Technology, 11/12 Gabriela Narutowicza Street, 80-233 Gdańsk, PolandSchool of Engineering and Computer Science, University of Hertfordshire, Hatfield, Herts AL10 9AB, UKIn the paper, a digital clock stopping technique for gain and offset correction in time-mode analog-to-digital converters (ADCs) has been proposed. The technique is dedicated to imagers with massively parallel image acquisition working in the time mode where compensation of dark signal non-uniformity (DSNU) as well as photo-response non-uniformity (PRNU) is critical. Fixed pattern noise (FPN) reduction has been experimentally validated using 128-pixel CMOS imager. The reduction of the PRNU to about 0.5 LSB has been achieved. Linearity improvement technique has also been proposed, which allows for integral nonlinearity (INL) reduction to about 0.5 LSB. Measurements confirm the proposed approach.https://www.mdpi.com/1424-8220/20/20/5921image sensorfixed pattern noisegain correctionoffset correctionintegral nonlinearity correctiontime-mode ADC |
| spellingShingle | Miron Kłosowski Yichuang Sun Fixed Pattern Noise Reduction and Linearity Improvement in Time-Mode CMOS Image Sensors Sensors image sensor fixed pattern noise gain correction offset correction integral nonlinearity correction time-mode ADC |
| title | Fixed Pattern Noise Reduction and Linearity Improvement in Time-Mode CMOS Image Sensors |
| title_full | Fixed Pattern Noise Reduction and Linearity Improvement in Time-Mode CMOS Image Sensors |
| title_fullStr | Fixed Pattern Noise Reduction and Linearity Improvement in Time-Mode CMOS Image Sensors |
| title_full_unstemmed | Fixed Pattern Noise Reduction and Linearity Improvement in Time-Mode CMOS Image Sensors |
| title_short | Fixed Pattern Noise Reduction and Linearity Improvement in Time-Mode CMOS Image Sensors |
| title_sort | fixed pattern noise reduction and linearity improvement in time mode cmos image sensors |
| topic | image sensor fixed pattern noise gain correction offset correction integral nonlinearity correction time-mode ADC |
| url | https://www.mdpi.com/1424-8220/20/20/5921 |
| work_keys_str_mv | AT mironkłosowski fixedpatternnoisereductionandlinearityimprovementintimemodecmosimagesensors AT yichuangsun fixedpatternnoisereductionandlinearityimprovementintimemodecmosimagesensors |