| ∑-△型A/D转换器中量化噪声的功率谱整形 |
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| 引用本文： | 徐国安,孙德丰,杜长艳.∑-△型A/D转换器中量化噪声的功率谱整形[J].吉林大学学报(信息科学版),2013,31(2):143-146. |
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| 作者姓名： | 徐国安 孙德丰 杜长艳 |
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| 作者单位： | 吉林大学教育技术中心,长春,130012;中国移动通信集团黑龙江有限公司,哈尔滨,150028 |
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| 摘 要： | 在设计数据采集系统时, 为使采集系统前端输出信号的带宽与后端处理模块相匹配, 在建立高阶Σ-Δ调制器理论模型的基础上, 对A/D转换器中的量化噪声功率谱的整形过程进行了研究。理论分析和仿真结果表明, 结合了过采样技术的高阶Σ-Δ型A/D转换器能大大降低量化噪声。
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| 关 键 词： | 数据采集 A/D转换器 功率谱 量化噪声 过采样 |
| 收稿时间： | 2012-06-13 |
Power Spectrum Shaping for Quantization Noise in Sigma-Delta AD Converter |
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| XU Guo-an
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SUN De-feng
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DU Chang-yan.Power Spectrum Shaping for Quantization Noise in Sigma-Delta AD Converter[J].Journal of Jilin University:Information Sci Ed,2013,31(2):143-146. |
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| Authors: | XU Guo-an SUN De-feng DU Chang-yan |
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| Institution: | 1. Center of Education Technology, Jilin University, Changchun 130012, China|2. China Mobile Group Heilongjiang Limited Company, Harbin 150028, China |
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| Abstract: | Sigma-delta ADC (AD Converter) is usually used in data acquisition system. It is necessary to research the process in which the power spectrum of quantization noise is shaped in ADC so that we can match the signal's bandwidth between the ADC's output and the next module's input. The higher-order sigma-delta modulator was modeled and the power spectrum shaping for quantization noise was analyzed. The theoretical analysis and the simulation result show that thequantization noise can be largely suppressed by over-sampling in higher-ordersigma-delta ADC. |
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| Keywords: | data acquisition A/D converter power spectrum quantization noise over-sampling |
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