Noise optimisation analysis of an active pixel sensor for low-noise real-time X-ray fluoroscopy

Noise optimisation analysis of an active pixel sensor for low-noise real-time X-ray fluoroscopy

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Theoretical calculations and simulation results for the noise of a hybrid active pixel sensor designed for real-time digital fluoroscopy are presented. Noise performance is given as a function of transistor dimensions, allowing the designer to choose appropriate device dimensions when designing flat-panel imaging circuits. Optimal device dimensions are derived for minimising the input referred noise of the active pixel to meet the stringent requirements for low-noise digital X-ray fluoroscopy (<1000 noise electrons).


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