A Global Shutter High Speed TDI CMOS Image Sensor With Pipelined Charge Transfer Pixel

作者：Xu, Jiangtao; Shi, Xiaolin; Nie, Kaiming^*; Gao, Zhiyuan

来源：IEEE Sensors Journal, 2018, 18(7): 2729-2736.

DOI：10.1109/JSEN.2018.2800743

• Time delay integration
• CMOS image sensor
• high speed
• pipeline
• charge transfer

In this paper, a 120 x 45 global shutter high speed time delay integration (TDI) CMOS image sensor with pipelined charge transfer pixel (PCT-pixel) is presented. Offset free and low noise pipelined signal accumulation are achieved by the PCT-pixel, and a novel layout is also proposed to increase the equivalent photosensitive area's fill factor of the proposed pixel. Due to the parallelism of the proposed PCT-pixel, global shutter exposure method is applied in this sensor, which can eliminate nonsynchronous signal capturing problem. The proposed TDI sensor is implemented in a 0.11-mu m one-poly three-metal CMOS image sensor technology with a line rate of 100 KHz, a PCT-pixel size of 30 x 15 mu m(2), and a fill factor of 43.5%. Measurement results show that the sensor can achieve a maximum sensitivity of 95 V/luxxsec and an energy consumption of 0.12 nJ/pixel. Measured signal-to-noise ratio boost value follows theoretical value well. The proposed sensor has the potential to achieve high scanning speed and high TDI stage while costing less power and silicon area.

• 出版日期2018-4-1
• 单位天津大学; 广东工业大学