| 一种基于统计的流水线ADC数字后台校准方法 |
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| 引用本文： | 丁洋,王宗民.一种基于统计的流水线ADC数字后台校准方法[J].微电子学与计算机,2011,28(2):69-73. |
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| 作者姓名： | 丁洋 王宗民 |
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| 作者单位： | 北京微电子技术研究所,北京,100076 |
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| 摘 要： | 高精度流水线ADC的设计需要校准技术来提高其转换精度.基于统计的数字后台校准方法无需校准信号,直接通过对输出的统计得到误差值的大小,将其从数字输出中移除从而消除了ADC输出非线性.将该校准方法应用于14bit流水线ADC中,仿真结果表明校准后信噪失真比SNR为76.9dB,无杂散动态范围SFDR为73.9dB,有效精度ENOB从9bit提高到12.5bit.
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| 关 键 词： | 流水线ADC 数字后台校准 电容失配 运放有限增益 |
A Statistical-Based Digital Background Calibration for Pipelined ADC |
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| DING Yang,WANG Zong-min.A Statistical-Based Digital Background Calibration for Pipelined ADC[J].Microelectronics & Computer,2011,28(2):69-73. |
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| Authors: | DING Yang WANG Zong-min |
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| Affiliation: | (Beijing Microelectronics Technology Institute,Beijing 100076,China) |
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| Abstract: | Pipelined ADCs with high resolution need calibration technique to increase their conversion precision.The statistical-based digital background calibration technique presented here calculates the output error via statistic analysis,and then the error is subtracted from the ADC output.With this calibration architecture used in a 14-bit pipelined ADC,the simulation results show that after calibration the SNR is 76.9 dB,SFDR is 73.9 dB,and the ENOB is improved from 9 bit to 12.5 bit. |
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| Keywords: | pipelined ADC digital background calibration capacitor mismatch finite op-amp gain |
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