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二阶多比特Sigma-Delta ADC中的自适应量化算法
  • ISSN号：1006-2467
  • 期刊名称：《上海交通大学学报》
  • 时间：0
  • 分类：TN79[电子电信—电路与系统]
  • 作者机构：[1]上海交通大学电子工程系,上海200240
  • 相关基金：国家自然科学基金委创新研究群体基金（编号60521002）,上海应用材料研究与发展基金（0501）和（06SA09）资助项目
作者： 褚炜路[1], 戎蒙恬[1], 李萍[1], 刘文江[1]
关键词： 多比特量化, 信噪比, 自适应量化, 动态电阻匹配, multi-bit quantization, signal to noise ratio （SNR）, adaptive quantization, dynamical resistor matching
中文摘要：

针对二阶多比特Sigma-Delta ADC的量化电平对信噪比的影响,提出了自适应量化算法（AQ）.该算法可根据输入信号的幅度变化,动态地调节多比特ADC的参考电平,从而改善二阶多比特Sigma-Delta ADC在小幅度输入时信噪比下降的问题.在此基础上,运用动态电阻匹配的方法,进一步减小了由于反馈数字模拟转化器（DAC）电阻不匹配带来的非线性噪声.仿真结果验证了该算法的有效性.

英文摘要：

Aiming at the effect caused by reference voltage of the quantizer upon the value of SNR in the 2nd order multi-bit sigma-delta ADC, this paper put forward an adaptive quantization algorithm. According to the amplitude of the input signal, the quantizer will adjust the reference voltage of the multi-bit quantizer in order to improve the SNR decreasing problem when the input amplitude is relatively low. Based on this method, dynamical resistor matching was used to reduce the non-linear noise caused by the unmatching of the feedback DAC. The simulation result shows the validity of this algorithm.

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期刊信息
  • 《上海交通大学学报》
  • 中国科技核心期刊
  • 主管单位:中华人民共和国教育部
  • 主办单位:上海交通大学
  • 主编：郑杭
  • 地址：上海市华山路1954号15F
  • 邮编：200030
  • 邮箱：shjt@chinajournal.net.cn
  • 电话：021-62933373 62932534
  • 国际标准刊号：ISSN：1006-2467
  • 国内统一刊号：ISSN：31-1466/U
  • 邮发代号:4-256
  • 获奖情况:
  • 1996年全国优秀科技期刊奖,1992年、1996年、1999年国家教育部系统优秀科技期刊奖,2002年“百种重点期刊奖”,2003年百种中国杰出学术期刊,2004年教育部全国高校优秀科技期刊一等奖,2004年“百种重点期刊奖”
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  • 美国化学文摘（网络版）,美国数学评论（网络版）,德国数学文摘,荷兰文摘与引文数据库,美国工程索引,美国剑桥科学文摘,英国科学文摘数据库,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2008版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）,中国北大核心期刊（2000版）
  • 被引量:30903