[1]王浩 钟伦贵 谢文明 郑少烽.SAR ADC中高能效电荷均值开关方法[J].福建工程学院学报,2017,15(03):285-288.[doi:10.3969/j.issn.1672-4348.2017.03.017]
　Wang Hao,Zhong Lungui,Xie Wenming,et al.Energy-efficient charge-average capacitor switching scheme for SAR ADC[J].Journal of FuJian University of Technology,2017,15(03):285-288.[doi:10.3969/j.issn.1672-4348.2017.03.017]
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SAR ADC中高能效电荷均值开关方法()
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《福建工程学院学报》[ISSN:2097-3853/CN:35-1351/Z]

卷:
第15卷
期数:
2017年03期
页码:
285-288
栏目:
出版日期:
2017-06-25

文章信息/Info

Title:
Energy-efficient charge-average capacitor switching scheme for SAR ADC
作者:
王浩 钟伦贵 谢文明 郑少烽
福建工程学院信息科学与工程学院微电子技术教研室
Author(s):
Wang Hao;  Zhong Lungui;  Xie Wenming;  Zheng Shaofeng
College of Information Science and Engineering, Fujian University of Technology
关键词:
高能效;  电荷均值;  开关方法;  SAR ADC
Keywords:
high energy-efficiency; charge-average;  switching scheme;  successive approximation register analog-to-digital converters（SAR ADC）
分类号:
TN43
DOI:
10.3969/j.issn.1672-4348.2017.03.017
文献标志码:
A
摘要:
提出一种逐次逼近型模数转换器（successive approximation register analog-to-digital converter，SAR ADC）高能效电荷均值开关方法。该方法能够提供恒定的共模电压VCM，大小为VREF的一半，且只需要使用两个参考电压VREF和地，避免了额外的电压基准电路。为了增加一位精度并保持恒定的共模电压，C-2C结构替代参考电容C。与单调开关方法相比，该方法能耗减少66.65％，电容面积减少49.41％。行为仿真结果证明了该方法的有效性。
Abstract:
An energy-efficient charge-average capacitor switching scheme was proposed for successive approximation register analog-to-digital converters (SAR ADCs). The charge-average technique ensures constant common-mode voltage VCM, which is VREF/2. Thus, only two reference voltages, VREF and ground, are utilized，avoiding extra circuit for generating references. Besides, to add one more bit precision and to keep common-mode voltage constant, a dummy capacitor is realized by C-2C structure instead of unit capacitor C. As a result, the proposed switching technique can save energy by 66.65％ and reduce capacitor area by 49.41％, respectively, compared to the monotonic switching scheme. Behavioural simulation results indicate that the proposed switching scheme is effective.

参考文献/References:

[1] Liu C C, Chang S J, Huang G Y, et al. A 10-bit 50-MS/s SAR ADC with a monotonic capacitor switching procedure[J]. IEEE Journal of SolidState Circuits,2010,45(4):731-740.
[2] Yuan C, Lam Y. Low-energy and area-efficient tri-level switching scheme for SAR ADC[J]. Electronics Letters,2012,48(9):482-483.
[3] Liou C Y, Hsieh C C. A 2.4-to-5.2 fJ/conversionstep 10b 0.5-to-4MS/s SAR ADC with charge-average switching DAC in 90nm CMOS[C]∥IEEE International SolidState Circuits Conference（ISSCC）. San Francisco, CA, USA. Feb 17-21,2013.Washington:IEEE,2013.
[4] Rahimi E, Yavari M. Energy-efficient high-accuracy switching method for SAR ADCs[J]. Electronics Letters,2014,50(7):499-501. 
[5] Kim J E, Cho S J, Kim Y S, et al. Energy-efficient charge-average switching DAC with floating capacitors for SAR ADC[J]. Electronics Letters,2014,50(16):1131-1132.

更新日期/Last Update: 2017-06-25