| 一种提高ADC分辨率的阶梯叠加法 |
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| 引用本文： | 胡志刚,过玉清.一种提高ADC分辨率的阶梯叠加法[J].电子测量技术,2009,32(3):38-41. |
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| 作者姓名： | 胡志刚 过玉清 |
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| 作者单位： | 东华大学机械工程学院,上海,201620 |
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| 摘 要： | 常用的提高ADC分辨率的分段转换法存在“漏码”,甚至无法保证A/D转换的单调性,而使效果相当有限。本文介绍一种能提高ADC分辨率的阶梯叠加法,该法令模拟输入电压Vi与由LSB换算得来的阶梯电压VS（p）的P种不同数值分别叠加,所得之和依次作为ADC的输入电压Vi＇,并对ADC的P个输出数码NOp求取平均值,作为整个数据系统的输出数码。理论上该法能实现LSB的细分,将原ADC的分辨率提高数位。通过3类实验,结果证明了理论的正确,同时对改进ADC电路设计具有重要借鉴意义。
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| 关 键 词： | ADC分辨率 阶梯叠加法 转换速率 |
Staircase function addition method of improving the resolution of analog-to-digital converter |
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| Hu Zhigang,Guo Yuqing.Staircase function addition method of improving the resolution of analog-to-digital converter[J].Electronic Measurement Technology,2009,32(3):38-41. |
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| Authors: | Hu Zhigang Guo Yuqing |
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| Affiliation: | College of Mechanical Engineering;Donghua University;Shanghai 201620 |
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| Abstract: | The segmentation conversion commonly used to improve the resolution of analog-to-digital converter can cause a missing-code error,even can't ensure the monotonicity of analog-to-digital converter,so its effect of improving the resolution is limited.This paper introduces a staircase function addition method that can improve the resolution of analog-to-digital converter,the method let the input voltage of analog Vi add respectively with P kind of values of staircase function voltage VS(p) converting from LSB,... |
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| Keywords: | resolution of analog-to-digital converter staircase function addition method rate of conversion |
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