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A charge sharing–based switching scheme for SAR ADCs
Author(s) -
Akbari Meysam,
Hashemipour Omid,
Nazari Masoud,
Moradi Farshad
Publication year - 2019
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.2635
Subject(s) - reset (finance) , successive approximation adc , capacitor , scheme (mathematics) , energy (signal processing) , computer science , electronic engineering , charge sharing , shaping , switched capacitor , voltage , control theory (sociology) , topology (electrical circuits) , electrical engineering , engineering , mathematics , artificial intelligence , control (management) , mathematical analysis , statistics , financial economics , economics
Summary This paper presents an energy‐efficient switching scheme for successive approximation register (SAR) analogue‐to‐digital converter (ADC). The proposed scheme employs charge recycling method to keep the capacitor arrays free of transitional energy between bit generations except reset phase. In comparison with the conventional switching scheme, the proposed one achieves 100% transitional energy saving without considering reset phase. In addition, configuration of a 10‐bit SAR ADC shows that the proposed switching scheme reduces the capacitor area by 25% compared with the conventional switching scheme.