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A charge sharing–based switching scheme for SAR ADCs |
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| Authors: | Meysam Akbari Omid Hashemipour Masoud Nazari Farshad Moradi |
| Affiliation: | 1. Microelectronic Laboratory, Shahid Beheshti University, G.C., Tehran, Iran;2. Faculty of Electrical Engineering, Shahid Beheshti University, G.C., Tehran, Iran;3. Department of Electrical and Computer Engineering, University of Akron, Akron, Ohio, USA;4. Integrated Circuits and Electronics Laboratory (ICE-LAB), Aarhus University, Aarhus, Denmark |
| Abstract: | 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. |
| Keywords: | capacitive DAC energy-efficient SAR ADC switching scheme |