| 基于非延时积分器Delta-Sigma调制的电容传感器探测电路 |
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| 引用本文： | 严博,曾韡,高峰.基于非延时积分器Delta-Sigma调制的电容传感器探测电路[J].传感技术学报,2009,22(11). |
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| 作者姓名： | 严博 曾韡 高峰 |
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| 作者单位： | 复旦大学国家微分析中心,上海,200433 |
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| 摘 要： | 研究一种基于非延时积分器Delta-Sigma调制的差分电容探测接口电路,该电路的Delta-Sigma调制使用非延时积分器将采样与积分同时进行,减小普通Delta-Sigma调制型电容探测电路中积分保持阶段的电荷泄露效应,仿真结果表明该结构可明显提高探测较小电容的信噪比,增加了调制器可探测电容的动态范围.
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| 关 键 词： | 传感器接口电路 电容探测 Delta-Sigma调制 积分器 积分漏电流 |
A delta-sigma modulator with non-delay integrator for capacitance detection |
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| YAN Bo,ZENG Wei,GAO FengNational Microanalysis Center,Fudan University,Shanghai ,China.A delta-sigma modulator with non-delay integrator for capacitance detection[J].Journal of Transduction Technology,2009,22(11). |
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| Authors: | YAN Bo ZENG Wei GAO FengNational Microanalysis Center Fudan University Shanghai China |
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| Affiliation: | YAN Bo,ZENG Wei,GAO FengNational Microanalysis Center,Fudan University,Shanghai 200433,China |
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| Abstract: | This paper introduces a Delta-Sigma modulator with non-delay integrator for capacitance detection,which reduces the leak charge by integrating and sampling simultaneously instead of taking them separately in most occasions.This structure can greatly improve the performance of Delta-Sigma modulator using in small capacitance detection.The end of this paper shows the simulation results of a 2nd order modulation which achieve a great increase ability in detecting SNR(Signal to Noise Ratio)for ultra small capac... |
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| Keywords: | transducer interface circuit capacitance detection Delta-Sigma modulation integrator leak current |
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