Tri-Mode Smart Vision Sensor With 11-Transistors/Pixel for Wireless Sensor Networks

We present the T-Sensor, a smart vision sensor capable of providing intensity, spatial contrast, and temporal difference images through the pixel level processing. The T-Sensor smart pixel is composed of only 11 transistors, allowing tight integration of different functionalities in a 16×21 μm² pixel area. Focal-plan processing for temporal difference and spatial contour is implemented with maximum and minimum comparing analog circuits, allowing T-Sensor to provide high-speed imaging with low-power consumption. The sensor array is 128 × 128 pixels, with a fill factor of 42%, and operates at 800 fps and 13M events/s with a power consumption of 1.02 mW.