- 标题
- 摘要
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- 实验方案
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Power Efficiency Figure of Merit for Image Sensors
摘要： A new figure of merit (FoM) is developed with a theory, which enables the comparison of power efficiency of different image sensors based only on the pixel array size, frame rate, and total power consumption. The mathematical foundation of the FoM is provided, enabling the application of FoM to a generic image sensor supporting various read-out configurations. The model assumes a nonlinear relationship between the power consumption and operating frequency of building blocks, and the nonlinear factor is numerically derived based on the analytical modeling of image sensors. The FoM is applied to the studies from 1999 to 2018, which clarifies the trend of improvement as well as visualizes several breakthroughs in the development history.
关键词： modeling,CMOS image sensor (CIS),power efficiency,figure of merit (FoM),power consumption
更新于2025-09-23 15:23:52
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A New Analytical Charge Transfer Model for Time-of-Flight Image Sensors
摘要： A powerful tool for analyzing the performances of an image sensor designed for time-of-flight measurement purposes, the impulse response measurement (IRM), is presented. A way to measure the charges diffusion time (time for the photogenerated charges to be collected by the photodiode) using the analysis of an IRM is given. An unexpected phenomenon that occurs when performing a specific IRM is then showcased: performing two successive transfers, a short duration one followed by a long duration one is actually less efficient than performing a single transfer of long duration (same duration as the second transfer in the first case). Accordingly, a mathematical sufficient condition on the charge transfer efficiency function (CTEF) is enounced. A physical modeling based on thermionic emission theory and the influence of the potential barrier’s width on its effective height is presented. The model leads to a new CTEF expression that fulfills the mathematical requirement. Finally, a numerical simulation with the new CTEF fitting the experimental IRM data is performed.
关键词： time-of-flight (TOF),thermionic emission theory,Dirac-light pulse (DLP),diffusion time,impulse response measurement (IRM),Charge transfer efficiency function (CTEF),CMOS image sensor (CIS),light image detection and ranging (LIDAR),sense node (SN)
更新于2025-09-10 09:29:36
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Dose and Single Event Effects on a Color CMOS Camera for Space Exploration
摘要： This paper focuses on the radiation-induced dose and single event effects on a color CMOS camera designed for space missions. Gamma-ray and protons are used to evaluate the tolerance against cumulative dose effects. The dark current of the image sensor is the main parameter impacted by dose effects. Heavy ions testing is performed to evaluate single event effects. SEU, SEFI and SEL have been observed and mitigation techniques were proposed for specific space missions.
关键词： Total Ionizing Dose (TID),Microlens,CMOS Image Sensor (CIS),Single Event Effects (SEE),Displacement Damage Dose (DDD),Pinned Photodiode (PPD),Active Pixel Sensor (APS),Monolithic Active Pixel Sensor (MAPS),Camera,Color filter,Random Telegraph Signal (RTS)
更新于2025-09-04 15:30:14