一种高精确度低功耗Delta–Sigma调制器  

A high precision low power consumption Delta–Sigma modulator

作　　者：罗志国[1,2] 谢亮[1,2] 王龙生[1,2] 段杰斌[1,2] 金湘亮[1,2] 

机构地区：[1]湘潭大学材料与光电物理学院,湖南湘潭411105 [2]微光电与系统集成湖南省工程实验室,湖南湘潭411105

出　　处：《太赫兹科学与电子信息学报》2014年第4期627-631,共5页Journal of Terahertz Science and Electronic Information Technology

基　　金：教育部新世纪优秀人才支持计划(NCET-11-0975);国家科技重大专项项目(2011ZX05008-005-04-02);湖南省自然科学基金资助项目(12JJ4064)

摘　　要：提出了一种应用于工业过程控制、便携式测量仪器等领域的高精确度低功耗Delta–Sigma调制器。该调制器采用积分器级联反馈(CIFB)二阶单环一位结构实现,并利用斩波稳零技术,有效地减小了调制器的1/f噪声和直流失调。调制器采用旺宏0.35μm CMOS工艺实现。仿真结果表明,在30 Hz的信号带宽内,调制器的信噪失真比(SNDR)可以达到105 dB,在3.3 V的工作电压下,功耗仅1.3 mW,满足对低频微弱信号的检测要求。A-Delta-Sigma-modulator,-featured-with-high-precision-and-low-power-consumption,-is-designed-for-the-process-control-in-industry,-portable-measuring-instrument,-etc.-The-modulator,-combining-Cascaded-Integrators-distributed-Feed-Back(CIFB)-structure-with-Chopper-Stabilization-technique,-being-realized-with-2nd-single-bit-architecture,-can-reduce-the-1/f-noise-and-dc-offset-effectively.-The-chip-is-implemented-by-MIXIC’s-0.35μm-CMOS-technology.-The-post-simulation-of-the-modulator-indicates-that-105-dB-Signal-to-Noise-and-Distortion-Ratio(SNDR)-has-been-achieved-within-bandwidth-of-30-Hz.-The-power-consumption-of-the-modulator-is-only-1.3-mW-at-supply-voltage-of-3.3-V.-The-modulator-can-meet-the-measurement-requirements-of-low-frequency-weak-signal.

关 键 词：Delta–Sigma调制器 低频 高精确度 低功耗 

分 类 号：TN761[电子电信—电路与系统]