Research and Circuit Design of Dynamic Path Accumulation CMOS Image Sensor

Abstract

In traditional TDI image sensors, the sensor is easily disturbed and vibrates, and the exposure information of each row of pixels is no longer synchronized, resulting in image distortion. In order to solve this problem, this paper studies the circuit-level vibration compensation method. In this paper, the working mode of the CMOS-TDI image sensor and the reasons for the image distortion caused by the vibration of the sensor are studied, and the principle of the digital domain dynamic path accumulation type TDI technology is proposed. Then, the dynamic path accumulation type CMOS-TDI is established in MATLAB. After that, the circuit structure of the algorithm is designed, including pixel timing control circuit, PTAT current source, correlated double sampling circuit design. Finally, by using 0.11µm CMOS process the simulation of the key circuit modules required for the dynamic path accumulation TDI are completed.