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http://dx.doi.org/10.5573/JSTS.2017.17.3.387

Mismatch-tolerant Capacitor Array Structure for Junction-splitting SAR Analog-to-digital Conversion  

Lee, Youngjoo (Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH))
Oh, Taehyoun (Department of Electronic Engineering, Kwangwoon University)
Park, In-Cheol (Department of Electrical Engineering, Korea Advanced Institute of Science and Technology)
Publication Information
JSTS:Journal of Semiconductor Technology and Science / v.17, no.3, 2017 , pp. 387-400 More about this Journal
Abstract
A new junction-splitting based SAR ADC with a redundant searching capacitor array structure in $0.13{\mu}m$ CMOS process to alleviate capacitor mismatch effects, is presented. The normalized average power has a factor of 0.35 to the conventional SAR ADC at 10-bit conversion accuracy. Statistical experiments show the number of missing codes resulting from the mismatch reduces by 95% for 3% unit-capacitor mismatch ratio, while keeping the conversion energy to that of the conventional JS capacitor array.
Keywords
Capacitor mismatch; low-power ADC; redundant ADC; SAR analog-to-digital convertor;
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