A vision sensor with on-pixel ADC and in-built light adaptation mechanism

  title={A vision sensor with on-pixel ADC and in-built light adaptation mechanism},
  author={A. Bermak and A. Bouzerdoum and K. Eshraghian},
  journal={Microelectronics Journal},
Abstract In this paper we propose an on-pixel Analogue-to-Digital Converter (ADC) based on pulse frequency modulation (PFM) scheme. This PFM based converter presents a viable solution for pixel-level based ADC. It uses a simple and robust circuit that can be implemented in a compact area resulting in a 23% fill-factor for a digital vision sensor in 0.25 μm CMOS technology. An in-built light adaptation mechanism has also been implemented which allows the sensor to better adapt to low-light… Expand
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