Dual-CDS Evaluation
Journal of Semiconductor Technology and Science publishes a paper "Design and Evaluation of a CMOS Image Sensor with Dual-CDS and Column-parallel SS-ADCs" by Bu-Yong Um, Jong-Ryul Kim, Sang-Hoon Kim, Jae-Hoon Lee, Jimin Cheon, Jaehyuk Choi, and Jung-Hoon Chun from Sungkyunkwan University, Suwon, Korea and Kumoh National Institute of Technology, Gumi, Korea. The paper compares Sony-style analog-digital CDS (Exmor) with few other alternatives (seem randomly chosen). No surprises, Sony-style CDS comes on top in terms of column FPN:
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