Noise in a CMOS digital pixel sensor |
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| Authors: | Zhang Chi Yao Suying Xu Jiangtao |
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| Affiliation: | School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China |
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| Abstract: | Based on the study of noise performance in CMOS digital pixel sensor(DPS),a mathematical model of noise is established with the pulse-width-modulation(PWM) principle.Compared with traditional CMOS image sensors,the integration time is different and A/D conversion is implemented in each PWM DPS pixel.Then,the quantitative calculating formula of system noise is derived.It is found that dark current shot noise is the dominant noise source in low light region while photodiode shot noise becomes significantly im... |
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| Keywords: | CMOS image sensor digital pixel sensor random noise pattern noise |
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