Switching scheme with 98.4% switching energy reduction and high accuracy for SAR ADCs

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• 作者：Liangbo Xie ; Jian Su ; Yao Wang ; Jiaxin Liu…
• 关键词：Energy ; efficiency ; SAR ADC ; High ; accuracy ; Area ; reduction
• 刊名：Analog Integrated Circuits and Signal Processing
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：90
• 期：3
• 页码：681-686
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Circuits and Systems; Electrical Engineering; Signal,Image and Speech Processing;
• 出版者：Springer US
• ISSN：1573-1979
• 卷排序：90

文摘

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 (V_cm) 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.