A 256 × 256 motion detector on a single chip has been developed. The sensor is fabricated through using the buried charge accumulator and sensing transistor array (BCAST) pixel architecture. The complete on-chip motion detection and the reproduction of high-quality images are performed simultaneously with per-column simple circuits. A 2 μm twin-tub CMOS process is used for its on-chip circuits. A dynamic range of 83.9 dB and a fixed pattern noise (FPN) of 79 dB at 60 frames/ s have been achieved. Furthermore, high-speed operations at 240 frames/s with digital output is possible. These results will extend the application of motion sensing to fields requiring high-quality images.
