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一款应用于生物传感器的1.2V-600nW 12bit 2kS/s的增量型模数转换器
引用本文:黄婷,金乐乐,李辉,刁盛锡,王国兴,姚立斌,贺林. 一款应用于生物传感器的1.2V-600nW 12bit 2kS/s的增量型模数转换器[J]. 半导体学报, 2014, 35(11): 115007-6
作者姓名:黄婷  金乐乐  李辉  刁盛锡  王国兴  姚立斌  贺林
作者单位:Department of Electronic Science and Technology,University of Science and Technology of China;School of Microelectronics,Shanghai Jiao Tong University;Kunming Institute of Physics
摘    要:This paper presents an ultra-low power incremental ADC for biosensor interface circuits.The ADC consists of a resettable second-order delta–sigma(°/ modulator core and a resettable decimation filter.Several techniques are adopted to minimize its power consumption.A feedforward path is introduced to the modulator core to relax the signal swing and linearity requirement of the integrators.A correlated-double-sampling(CDS)technique is applied to reject the offset and 1/f noise,thereby removing the integrator leakage and relaxing the gain requirement of the OTA.A simple double-tailed inverter-based fully differential OTA using a thick-oxide CMOS is proposed to operate in the subthreshold region to fulfill both an ultra-low power and a large output swing at 1.2 V supply.The signal addition before the comparator in the feedforward architecture is performed in the current domain instead of the voltage domain to minimize the capacitive load to the integrators.The capacitors used in this design are of customized metal–oxide–metal(MOM) type to reach the minimum capacitance set by the k T =C noise limit.Fabricated with a 1P6 M 0.18 m CMOS technology,the presented incremental ADC consumes600 n W at 2 k S/s from a 1.2 V supply,and achieves 68.3 d B signal to noise and distortion ratio(SNDR) at the Nyquist frequency and an FOM of 0.14 p J/conversion step.The core area is 100120 m2.

关 键 词:biosensor  incremental  modulator  instead  requirement  minimize  capacitive  swing  inverter  removing
收稿时间:2014-03-10
修稿时间:2014-05-05

A 1.2 V 600 nW 12-bit 2 kS/s incremental ADC for biosensor application
Huang Ting,Jin Lele,Li Hui,Diao Shengxi,Wang Guoxing,Yao Libin and He Lin. A 1.2 V 600 nW 12-bit 2 kS/s incremental ADC for biosensor application[J]. Chinese Journal of Semiconductors, 2014, 35(11): 115007-6
Authors:Huang Ting  Jin Lele  Li Hui  Diao Shengxi  Wang Guoxing  Yao Libin  He Lin
Affiliation:Department of Electronic Science and Technology, University of Science and Technology of China, Hefei 230027, China;Department of Electronic Science and Technology, University of Science and Technology of China, Hefei 230027, China;Department of Electronic Science and Technology, University of Science and Technology of China, Hefei 230027, China;Department of Electronic Science and Technology, University of Science and Technology of China, Hefei 230027, China;School of Microelectronics, Shanghai Jiao Tong University, Shanghai 200240, China;Kunming Institute of Physics, Kunming 650223, China;Department of Electronic Science and Technology, University of Science and Technology of China, Hefei 230027, China
Abstract:
Keywords:ADC  incremental ADC  feedforward  inverter-based OTA  biosensor
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