Column-Parallel ADCs for CMOS Image Sensors and Their FoM-Based Evaluations
Column-Parallel ADCs for CMOS Image Sensors and Their FoM-Based Evaluations
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DOI：
10.1587/transele.e101.c.444
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发表时间：
2018-07-01
影响因子：
0.5
通讯作者：
Kawahito, Shoji
中科院分区：
文献类型：
--
作者：
Kawahito, Shoji
本文综述了用于CMOS图像传感器的列并行模数转换器(ADC)的结构和拓扑结构，讨论了基于品质因数(FOM)的列并行ADC的性能，并考虑了在低、中和高像素率区域表现不同的噪声模型。定义了考虑不同性能因素的各种FOM。将定义的FOM应用于使用列并行ADC的已报告CIS的调查数据，这些ADC分为4种类型：单斜率ADC、SAR ADC、循环ADC和Delta-Sigma ADC。低、中、高像素率区域的(噪声)(2)(功率)/(像素率)分别定义的FOM很好地解释了CIS在所有像素率下的性能前沿。利用(噪声)(2)(功率)/(级内动态范围)(像素率)定义的FOM，阐明了最近报道的扩展动态范围CI的技术的有效性。
This paper reviews architectures and topologies for column-parallel analog-to-digital converters (ADCs) used for CMOS image sensors (CISs) and discusses the performance of CISs using column-parallel ADCs based on figures-of-merit (FoM) with considering noise models which behave differently at low/middle and high pixel-rate regions. Various FoM considering different performance factors are defined. The defined FoM are applied to surveyed data on reported CISs using column-parallel ADCs which are categorized into 4 types; single slope, SAR, cyclic and delta-sigma ADCs. The FoM defined by (noise)(2)(power)/(pixel-rate) separately for low/middle and high pixel-rate regions well explains the frontline of the CIS' performance in all the pixel rates. Using the FoM defined by (noise)(2)(power)/(intrascene dynamic range)(pixel-rate), the effectiveness of recently-reported techniques for extended-dynamic-range CISs is clarified.