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1 CN111556266A
一种基于背照式图像传感器的高动态范围读出电路
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Publication/Patent Number: CN111556266A Publication Date: 2020-08-18 Application Number: 202010339328.1 Filing Date: 2020-04-26 Inventor: 耿莉     张冰   辛有泽   赵泽亮   Assignee: 西安交通大学   IPC: H04N5/378 Abstract: 本发明公开了一种基于背照式图像传感器的高动态范围读出电路,模拟相关采样和可编程增益放大器,通过多次采样保持的开关切换策略及调整至设定的增益,将像素内读出的电压信号预防大后传输至下级模数转换器;折叠循环式模数转化器,将前级预防大采样后的信号进行量化;数字相关采样合并逻辑电路,得到真正的数字量化信号;时序控制电路,逐行对每列的模数转换器进行控制;输入信号依次经过模拟相关采样和可编程增益放大器,折叠循环式模数转化器和数字相关采样合并逻辑电路后输出量化信号,时钟信号经时序控制电路后分别输入折叠循环式模数转化器和数字相关采样合并逻辑电路。本发明减小量化误差,提高动态范围,降低读出电路的整体功耗与面积。