【作者】 刘昊； 孟丽娅； 赖小峰； 袁祥辉；

【Author】 LIU Hao MENG Li-yang LAI Xiao-feng YUAN Xiang-hui (Key Laboratory of Ministry of Education of Photoelectric Technique and System,Chongqing University, Chongqing 400044,China)

【机构】 重庆大学光电技术及系统教育部重点实验室；

【摘要】 CMOS图像传感器动态范围是关系成像质量的关键条件,决定着图像传感器的使用前景。提出了一种新型结构高动态范围CMOS读出电路结构。采用积分时间与光强线性对应的方法,设计相关时间信息转换电压电路,在扩展CMOS读出电流的动态范围下,极大地降低了功耗。实验表明,基于0.6μm/level7 CMOS工艺,用PSPICE仿真,动态范围可达126dB,像元功耗2.1μW。更多还原

【Abstract】 Dymanic range is key condition influencing the image quality of CMOS sensors,and it will determine the development and use of CMOS.A new CMOS pixel structure that achieves high dynamic range using is reported.The system power consumption was reduced greatly within the dynamic range of CMOS readout circuit by a piecewise linear response circuits,and the design of correlated pulse circuits.Experimental results show that based on the 0.6μm/level7CMOS process and PSPICE simulation, the dynamic range is 126dB and the power consumption is only 2.1μW per pixel at 3.3 V.更多还原