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- W3048431371 abstract "This article presents an ultra-low power counter structure for a column-parallel single-slope analog-to-digital converter (SS-ADC) in CMOS image sensors. The proposed counter employs a two-step logical shift algorithm-based correlated double sampling (CDS) scheme. The logical shift algorithm can reduce parasitic capacitances, driving frequency, and inner toggling nodes by using the minimum number of transistors and a single-direction counter structure. Moreover, the two-step counting and double data rate scheme in the LSB counter can halve the operating clock frequency, resulting in further decreased power consumption. A prototype sensor was fabricated using a 110 nm CMOS image sensor process. The measurement results show that the proposed SS-ADC with a two-step counter consumes 2.4 μW power per column and shows a differential nonlinearity of +0.38/-0.25 LSB and an integral nonlinearity of +0.75/-0.5 LSB. The total power consumption is 2.25 mW for 640 × 480 effective image resolution at 60 frame rates with 3.3 V/1.5 V supply voltage." @default.
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- W3048431371 date "2020-11-01" @default.
- W3048431371 modified "2023-10-05" @default.
- W3048431371 title "Ultra-Low Power CMOS Image Sensor With Two-Step Logical Shift Algorithm-Based Correlated Double Sampling Scheme" @default.
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- W3048431371 doi "https://doi.org/10.1109/tcsi.2020.3012980" @default.
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