A Linear-Logarithmic CMOS Image Sensor With Adjustable Dynamic Range
| Autor: | Myunghan Bae, Sung-Hyun Jo, Pyung Choi, Jang-Kyoo Shin, Byoung-Soo Choi, Hee-Ho Lee |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Physics CMOS sensor Pixel business.industry Dynamic range 010401 analytical chemistry ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Electrical engineering 01 natural sciences Dot pitch 0104 chemical sciences Photodiode law.invention Optics law 0103 physical sciences Wide dynamic range Hardware_INTEGRATEDCIRCUITS Sensitivity (control systems) Electrical and Electronic Engineering Image sensor business Instrumentation |
| Zdroj: | IEEE Sensors Journal. 16:5222-5226 |
| ISSN: | 2379-9153 1530-437X |
| Popis: | A new pixel structure is proposed for wide dynamic range CMOS image sensors. A pixel based on a three-transistor active pixel sensor has two linear responses and a logarithmic response using additional circuits. The photogate surrounding the n+/p-sub photodiode exists for the second linear response. The logarithmic response is due to the biased MOS cascode. The proposed pixel was designed and fabricated using a 0.35- $\mu \text{m}$ 2-poly 4-metal standard CMOS process. The dynamic range of the pixel is higher than 106 dB. A test chip with a pixel pitch of $10 \times 10~\mu \text{m}^{2}$ and a $160 \times 120$ pixel array is evaluated. |
| Databáze: | OpenAIRE |
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