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• W1545807718 startingPage "2149" @default.
• W1545807718 abstract "A dynamic vision sensor (DVS) encodes temporal contrast (TC) of light intensity into address-events that are asynchronously transmitted for subsequent processing. This paper describes a DVS with improved TC sensitivity and event encoding. To enhance the TC sensitivity, each pixel employs a common-gate photoreceptor for low output noise and a capacitively-coupled programmable gain amplifier for continuous-time signal amplification without sacrificing the intra-scene dynamic range. A proposed in-pixel asynchronous delta modulator (ADM) better preserves signal integrity in event encoding compared with self-timed reset (STR) used in previous DVSs. A 60 × 30 prototype sensor array with a 31.2 μm pixel pitch was fabricated in a 1P6M 0.18 μm CMOS technology. It consumes 720 μW at a 100k event/s output rate. Measurements show that a 1% TC sensitivity with a 35% relative standard deviation is achieved and that the in-pixel ADM is up to 3.5 times less susceptible to signal loss than STR in terms of event number. These improvements can facilitate the application of DVSs in areas like optical neuroimaging which is demonstrated in a simulated experiment." @default.
• W1545807718 created "2016-06-24" @default.
• W1545807718 creator A5030469075 @default.
• W1545807718 creator A5051651857 @default.
• W1545807718 creator A5056559993 @default.
• W1545807718 date "2015-09-01" @default.
• W1545807718 modified "2023-09-30" @default.
• W1545807718 title "A Dynamic Vision Sensor With 1% Temporal Contrast Sensitivity and In-Pixel Asynchronous Delta Modulator for Event Encoding" @default.
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• W1545807718 doi "https://doi.org/10.1109/jssc.2015.2425886" @default.
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