Abstract
In this letter, a highly energy-efficient switching scheme for successive approximation register (SAR) analog-to-digital converters (ADC) is presented with the redundant capacitance splitting technology. The redundant capacitance splitting technology is put forward innovatively to divide the convert cycles into two parts: high bits cycles and low bits cycles. And through a simple switch, the redundant capacitance is split off from the capacitance array in the high bits convert cycles, resulting in the improvement of SAR ADC performance. With the monotonic mode, the first bit cycle and the second bit cycle are completed without consuming any switching energy. The proposed novel switching scheme can achieve 99.54% less switching energy and 75% reduction in capacitor area compared with the conventional switching scheme for SAR ADC, respectively.
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Liu, J., Liu, S., Huang, L. et al. A highly energy-efficient switching scheme for SAR ADC with the redundant capacitance splitting technology. Analog Integr Circ Sig Process 97, 169–176 (2018). https://doi.org/10.1007/s10470-018-1302-6
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DOI: https://doi.org/10.1007/s10470-018-1302-6