| 混合滤波器组ADC通路失配偏差的校准方法 |
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| 引用本文： | 刘素娟,杨玥,张特,陈建新.混合滤波器组ADC通路失配偏差的校准方法[J].电子学报,2011,39(8):1889-1893. |
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| 作者姓名： | 刘素娟 杨玥 张特 陈建新 |
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| 作者单位： | 北京工业大学电子信息与控制工程学院,北京,100124 |
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| 基金项目： | 北京市自然科学基金，教育部博士点新教师基金，北京市教委项目 |
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| 摘 要： | 针对各采样通路之间的不匹配影响混合滤波器组ADC的重构精度这一问题,本文提出了一种校准混合滤波器组ADC通路失配偏差的模型,该模型将通路间的增益偏差、相位偏差和带宽失配偏差引入到混合滤波器组ADC中.基于此模型,建立根据输出数据求解超定方程组估算失配偏差的方法,给出引入失配偏差的混合滤波器组的结构,推导出其完美重构条件.设计实现了160MHz 12-bit的两通路混合滤波器组ADC系统,实验结果表明,提出的通路失配偏差的校准方法可提高系统的无杂散动态范围(SFDR)23dB.
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| 关 键 词： | 模拟数字转换器 混合滤波器组 通路失配偏差 校准 |
| 收稿时间： | 2009-08-31 |
Calibration Technique of Channel Mismatches in Hybrid Filter Banks ADC |
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| LIU Su-juan,YANG Yue,ZHANG Te,CHEN Jian-xin.Calibration Technique of Channel Mismatches in Hybrid Filter Banks ADC[J].Acta Electronica Sinica,2011,39(8):1889-1893. |
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| Authors: | LIU Su-juan YANG Yue ZHANG Te CHEN Jian-xin |
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| Affiliation: | College of Electronic Information and Control Engineering,Beijing University of Technology,Beijing 100124,China |
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| Abstract: | The channel mismatches degrade the reconstruction performance of hybrid filter banks (HFB) analog-to-digital converters (ADC).This paper presents a comprehensive model that takes gain,phase,and bandwidth mismatches into account.Based on this model,a method that calculates the value of the channel mismatches by solving overdetermined equations is developed.An improved architecture is introduced based on the model and the perfect reconstruction expression is derived.Finally,a two-channel 160MHz 12-bit HFB ADC system is implemented.The experimental results show that the proposed calibration technique produces about 23 dB of spurious-free dynamic range (SFDR) enhancement. |
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| Keywords: | analog-to-digital converter hybrid filter banks channel mismatch calibration |
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