一款具有全温度计码电流控制斜坡的1000帧每秒高动态范围全局快门CMOS图像传感器。

A 1000 fps High-Dynamic-Range Global Shutter CMOS Image Sensor with Full Thermometer Code Current-Steering Ramp.

作者信息

Han Liqiang, Cheng Ganlin, Zhang Xu, Wang Gengyun, Pan Weijun, Yao Yao, Yu Guihai, Zhang Ruimeng, Mu Shuaichen, Wu Songbo, Bu Hongbo, Dai Liqun, Fan Ben, Wang Dan, Fan Wei, Chen Ruiming

机构信息

Beijing Institute of Space Mechanics and Electricity, Beijing 100094, China.

出版信息

Sensors (Basel). 2025 Jul 18;25(14):4483. doi: 10.3390/s25144483.

DOI:10.3390/s25144483

PMID:40732609

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12299803/

Abstract

We present a 1024 × 512, 1000 fps, high-dynamic-range global shutter CMOS image sensor. The pixel is based on a voltage domain global shutter architecture, featuring a pitch of 24 μm × 24 μm. Both high-gain and low-gain signals can be captured within a single frame. The combined dynamic range is 95 dB, and the full well capacity is 620 ke-. In this paper, we analyze the pixel noise performance as well as the non-linearity and image lag that arise from parasitic capacitance in the pixel. The ramp generator is based on a 12-bit full thermometer code current-steering DAC with high driving capability. We discuss the design considerations for the ramp generator, particularly addressing the phenomenon of non-linear response. Finally, the comparator design and the column readout noise are analyzed.

摘要

我们展示了一款1024×512、1000帧每秒、高动态范围的全局快门CMOS图像传感器。该像素基于电压域全局快门架构，像素间距为24μm×24μm。在一帧内可同时捕获高增益和低增益信号。组合动态范围为95dB，满阱容量为620ke-。在本文中，我们分析了像素噪声性能以及由像素中的寄生电容引起的非线性和图像滞后。斜坡发生器基于具有高驱动能力的12位全温度计码电流舵DAC。我们讨论了斜坡发生器的设计考虑因素，特别是针对非线性响应现象。最后，分析了比较器设计和列读出噪声。