| 一种用于14 bit SAR ADC的数字自校准算法 |
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| 引用本文： | 郑敏,何明华,杨尊先.一种用于14 bit SAR ADC的数字自校准算法[J].电子技术应用,2011,37(1). |
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| 作者姓名： | 郑敏 何明华 杨尊先 |
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| 作者单位： | 福州大学物理与信息工程学院,福建福州,350003 |
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| 基金项目： | 福建省科技重大专项，福建省自然科学基金重点项目 |
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| 摘 要： | 为了实现高精度14bit的逐次逼近型SAR(Successive Approximation)模数转换器ADC,提出一种数字自校准算法。该算法通过切换两种电容阵列的工作状态,得到电容之间的失配误差,并在ADC正常工作时,将得到的电容误差加载到电路中达到在转换过程消除失配的目的。最后对一个失配误差为0.5%的14bit的SARADC系统模型进行参数仿真,结果验证了本数字校准算法的正确性和有效性。
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| 关 键 词： | SAR ADC 数字校准 电容失配 |
A digital self-calibration technique for SAR ADC |
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| Zheng Min,He Minghua,Yang Zunxian.A digital self-calibration technique for SAR ADC[J].Application of Electronic Technique,2011,37(1). |
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| Authors: | Zheng Min He Minghua Yang Zunxian |
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| Abstract: | In order to implement the high resolution SAR ADC, a self-calibration arithmetic is proposed in this paper. The capacitor mismatch error is calculated by switching between two different work states. And then the error is loaded into the system for eliminating the mismatch error during the conversion cycle. Finally, a 14 bit SAR ADC system model with 0.5% mismatch error is proposed and simulated successfully, and the correctness of the algorithm has been verified effectively. |
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| Keywords: | SAR ADC |
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