Pixel-level A/D conversion using voltage reset technique
This paper presents a 50 Hz 15-bit analog-to-digital converter （ADC） for pixel-level implementation in CMOS image sensors. The ADC is based on charge packets counting and adopts a voltage reset technique to inject charge packets. The core circuit for charge/pulse conversion is specially optimized fo...
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| Published in | Journal of semiconductors Vol. 35; no. 11; pp. 149 - 153 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.11.2014
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| Subjects | |
| Online Access | Get full text |
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| Abstract | This paper presents a 50 Hz 15-bit analog-to-digital converter （ADC） for pixel-level implementation in CMOS image sensors. The ADC is based on charge packets counting and adopts a voltage reset technique to inject charge packets. The core circuit for charge/pulse conversion is specially optimized for low power, low noise and small area. An experimental chip with ten pixel-level ADCs has been fabricated and tested for verification. The measurement result shows a standard deviation of 1.8 LSB for full-scale output. The ADC has an area of 45 × 45μm^2 and consumes less than 2 μW in a standard 1P-6M 0.18μm CMOS process. |
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| AbstractList | This paper presents a 50 Hz 15-bit analog-to-digital converter （ADC） for pixel-level implementation in CMOS image sensors. The ADC is based on charge packets counting and adopts a voltage reset technique to inject charge packets. The core circuit for charge/pulse conversion is specially optimized for low power, low noise and small area. An experimental chip with ten pixel-level ADCs has been fabricated and tested for verification. The measurement result shows a standard deviation of 1.8 LSB for full-scale output. The ADC has an area of 45 × 45μm^2 and consumes less than 2 μW in a standard 1P-6M 0.18μm CMOS process. This paper presents a 50 Hz 15-bit analog-to-digital converter (ADC) for pixel-level implementation in CMOS image sensors. The ADC is based on charge packets counting and adopts a voltage reset technique to inject charge packets. The core circuit for charge/pulse conversion is specially optimized for low power, low noise and small area. An experimental chip with ten pixel-level ADCs has been fabricated and tested for verification. The measurement result shows a standard deviation of 1.8 LSB for full-scale output. The ADC has an area of 45 x 45 [mu]m super(2) and consumes less than 2 [mu]W in a standard 1P-6M 0.18 [mu]m CMOS process. |
| Author | 李敏增 李福乐 张春 王志华 |
| AuthorAffiliation | Institute of Microelectronics, Tsinghua University, Beijing 100084, China |
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| Cites_doi | 10.1109/4.735552 10.1109/JSSC.2006.884866 10.1109/4.748186 10.1117/12.243528 10.1088/1674-4926/34/8/085016 |
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| Notes | This paper presents a 50 Hz 15-bit analog-to-digital converter （ADC） for pixel-level implementation in CMOS image sensors. The ADC is based on charge packets counting and adopts a voltage reset technique to inject charge packets. The core circuit for charge/pulse conversion is specially optimized for low power, low noise and small area. An experimental chip with ten pixel-level ADCs has been fabricated and tested for verification. The measurement result shows a standard deviation of 1.8 LSB for full-scale output. The ADC has an area of 45 × 45μm^2 and consumes less than 2 μW in a standard 1P-6M 0.18μm CMOS process. 11-5781/TN pixel-level analog-to-digital converter （ADC）; voltage reset techniaue： low soeed and hieh resolution Li Minzeng, Li Fule, Zhang Chun, Wang Zhihua（ Institute of Microelectronics, Tsinghua University, Beijing 100084, China） ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
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| References | 12 Snoeij M F (5) 2007 15 Li Y (6) 2009 Reckleben C (14) 2011 1 Mahmoodi A (7) 2007 Mahmoodi A (10) 2008 3 Yang D X D (11) 1996 Hashemi F (13) 2003; 2 Smith S (2) 1998 Tchagaspanian M (16) 2007 Peizerat A (8) 2007 Fowler B (9) 1994 Han Ye (4) 2013; 34 |
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| Snippet | This paper presents a 50 Hz 15-bit analog-to-digital converter （ADC） for pixel-level implementation in CMOS image sensors. The ADC is based on charge packets... This paper presents a 50 Hz 15-bit analog-to-digital converter (ADC) for pixel-level implementation in CMOS image sensors. The ADC is based on charge packets... |
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| StartPage | 149 |
| SubjectTerms | Charge CMOS CMOS图像传感器 CMOS工艺 Consumption Conversion Electric potential Semiconductors Standard deviation Voltage 像素级 复位 技术 数字转换器 标准偏差 电压 |
| Title | Pixel-level A/D conversion using voltage reset technique |
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