| 利用过采样技术提高ADC测量微弱信号时的分辨率 |
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| 引用本文： | 李刚,张丽君,林凌,何峰. 利用过采样技术提高ADC测量微弱信号时的分辨率[J]. 纳米技术与精密工程, 2009, 7(1): 71-75 |
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| 作者姓名： | 李刚 张丽君 林凌 何峰 |
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| 作者单位： | 天津大学生物医学信息检测与处理实验室,天津,300072 |
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| 摘 要： | 为了提高现有模数转换器（analog-to-digital converter，ADC）检测微弱信号的能力，简化系统电路和降低生产成本，在充分利用ADC采样速度的条件下，通过过采样技术来提高ADC的分辨率，并且采用叠加成形函数的方法，实现了对微弱信号的检测．理论分析了不同情况下成形函数带来的误差、成形函数的使用条件和减少其带来的误差的方法实验结果表明，用常规中分辨率ADC直接采样，就可以达到与现有高分辨率ADC直接采样才有的高精度；而使用叠加成形函数后的过采样技术，其效果更佳.
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| 关 键 词： | 成形函数 过采样 高精度 微弱信号检测 高分辨率 |
Application of Oversampling Technique in Upgrading ADC's Resolution in Weak Signal Detection |
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| LI Gang,ZHANG Li-jun,LIN Ling,HE Feng. Application of Oversampling Technique in Upgrading ADC's Resolution in Weak Signal Detection[J]. Nanotechnology and Precision Engineering, 2009, 7(1): 71-75 |
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| Authors: | LI Gang ZHANG Li-jun LIN Ling HE Feng |
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| Affiliation: | Biomedical Signal Detecting and Processing Laboratory;Tianjin University;Tianjin 300072;China |
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| Abstract: | In order to advance the ability of weak signal detection by the existing analog-to-digital converter(ADC), simplify the circuit of system and reduce the cost,oversampling technique was applied to increase ADC's resolution while making full use of the speed of ADC. Moreover,addition of the shaped function was applied,and then oversampling was utilized to detect the weak signal. Theoretical analysis of error brought by the shaped function under various conditions was made and the condition for the shaped func... |
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| Keywords: | shaped function oversampling high precision weak signal detection high resolution |
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