A CMOS retinal rotational sensor for clockwise/counterclockwise detecting and velocity measuring

In this paper, a CMOS retinal rotational sensor for clockwise/counterclockwise detecting and velocity measuring is proposed. The proposed chip is attractive due to the fact that analog image processing circuits within a pixel are implemented by digital circuits. It can be integrated robustly and compactly. Based upon the device parameters of 0.35 µm 2P4M CMOS technology with 3 V power supply, all the functions and performance of the proposed CMOS retinal rotational sensor for clockwise/counterclockwise detecting and velocity measuring are successfully tested and proven through SPICE simulations. The chip area is 1.792 × 1.795 mm2. The proposed chip is suitable for rotational image detecting and velocity measuring.