A Multifunctional Pixel With Temperature‐Sensing Capability for Threshold Correction in Dynamic Vision Sensor

This paper analyzes the relationship between temperature, dark current, and threshold in dynamic vision sensor (DVS), and proposes a multifunctional pixel circuit to mitigate event loss caused by the attenuation factor = 1 + /. In addition to its basic event output function, the pixel is capable of sensing temperature and outputting absolute light intensity information, which are used to calculate and in , thereby enabling threshold adjustment for the correction of the event rate. The design is implemented in 0.11‐μm process with a single pixel size of 25 μm × 25 μm. The simulation results show that the proposed pixel temperature‐sensing mode achieves a maximum 3 error of 0.89°C in the temperature range of −15°C–85°C, and the absolute error is within ±0.3°C. The threshold correction mechanism shows effective performance over a wide temperature range. The postsimulation results demonstrate that the correction mechanism can reduce the error in the event rate by at least 79.68.