Switching scheme with 98.4% switching energy reduction and high accuracy for SAR ADCs |
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| Authors: | Liangbo Xie Jian Su Yao Wang Jiaxin Liu Guangjun Wen |
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| Affiliation: | 1.School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing,People’s Republic of China;2.Center for RFIC and System Technology, School of Communication and Information Engineering,University of Electronic Science and Technology of China,Chengdu,People’s Republic of China |
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| Abstract: | An energy-efficient digital-to-analogue converter (DAC) switching scheme with high-accuracy is proposed for successive approximation register (SAR) analogue-to-digital converters (ADCs). By utilizing a complementary switching method, the proposed switching scheme achieves a 98.4% switching energy reduction and a 75% area reduction compared to the conventional SAR ADC. Moreover, the accuracy of the SAR ADC is independent on the accuracy of the third reference voltage (Vcm) except the least significant bit, and the common-mode voltage of the DAC outputs keeps approximately unchanged during a conversion cycle, making the design of the SAR ADC more relaxed. |
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