| 石英挠性摆式加速度计sigma-delta接口电路的分析与设计 |
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| 引用本文： | 周薇,蔡体菁.石英挠性摆式加速度计sigma-delta接口电路的分析与设计[J].东南大学学报,2011(3):266-269. |
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| 作者姓名： | 周薇 蔡体菁 |
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| 作者单位： | 东南大学仪器科学与工程学院; |
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| 基金项目： | The National High Technology Research and Development Program of China (863 Program) ( No. 2006AA12Z302) |
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| 摘 要： | 针对微弱重力信号测量中加速度计的数字输出接口电路应具有高分辨率的问题,引入了开关电容(SC)sigma-delta调制器(SDM).基于SDM的工作原理和拓扑结构,分析了过采样比、内部量化器位数以及级联结构对提高微弱信号检测精度的影响,设计了满足加速度计接口电路高分辨率要求的理想二阶1位低失真SDM结构.通过研究各模块...
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| 关 键 词： | 开关电容电路 sigma-delta调制器 高分辨率 非理想特性 低功耗 |
Analysis and design of sigma-delta interface circuit for quartz flexural pendulum accelerometer |
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| Zhou Wei Cai Tijing.Analysis and design of sigma-delta interface circuit for quartz flexural pendulum accelerometer[J].Journal of Southeast University(English Edition),2011(3):266-269. |
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| Authors: | Zhou Wei Cai Tijing |
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| Institution: | Zhou Wei Cai Tijing(School of Instrument Science and Engineering,Southeast University,Nanjing 210096,China) |
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| Abstract: | For the high resolution required in a digital interface circuit of an accelerometer used in feeble gravity measurement,a switched-capacitor(SC) sigma-delta modulator(SDM) is proposed.Based on the principle and the topology structure of the SDMs,the influence of oversampling ratio,bits of an internal quantizer and the cascaded structure on weak signal detecting precision is analyzed,and an ideal low-distortion SDM with a second-order 1-bit structure satisfying the high-resolution interface circuit of an acce... |
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| Keywords: | switched-capacitor(SC) circuit sigma-delta modulator(SDM) high resolution non-ideality low power |
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