Energy-efficient, area-efficient, high-accuracy and low-complexity switching scheme for SAR ADC

IEICE Electronics Express

Zhihong He¹  Yunfeng Hu²  Zichuan Yi²  Bin Li² 

[1] Shenzhen Guohua Optoelectronic Technology Co., Ltd.;Zhongshan Institute, University of Electronic Science and Technology of China

关键词: SAR ADC;    switching scheme;    energy-efficient;    area-efficient;    high-accuracy;    low-complexity;   

DOI  :  10.1587/elex.14.20170428

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

An energy-efficient, area-efficient, high-accuracy and low-complexity switching scheme for successive approximation register (SAR) analogue-to-digital converter (ADC) is proposed. In the proposed switching scheme, both the first and the second comparisons don’t consume switching energy, and all the rest of comparisons consume little switching energy. As a result, the proposed switching scheme achieves a 95.34% switching energy reduction and a 75% area reduction compared with the conventional method. In addition, only the least significant bit (LSB) is depended on the accuracy of Vcm. Moreover, only two reference voltages are used for each capacitor, which lowers complexity of digital control logic.

【 授权许可】

CC BY