通过减少过量噪声来提高模数转换器的动态范围

Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI:10.1109/PACRIM.1989.48429

E. Seifert, A. Nauda

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引用次数: 19

摘要

提出了一种提高模数转换器动态范围的技术。该技术由几个并行n位ADC的输出求和组成，以减少每个ADC引入的不相关多余噪声。这增加了有效位分辨率的数量，并且对于恢复抖动后丢失的位最有用，以减少频谱分析应用中的杂散谐波。讨论了该方法对元件增益和延迟不确定性的敏感性

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Enhancing the dynamic range of analog-to-digital converters by reducing excess noise

A technique for improving the dynamic range of analog-to-digital converters (ADCs) is presented. The technique consists of summing outputs of several parallel N-bit ADCs to reduce the uncorrelated excess noise introduced by each ADC. This increases the number of effective bits of resolution and is most useful to regain bits lost after dithering to reduce spurious harmonics for spectral analysis applications. The sensitivity of this approach to uncertainties in component gain and delay is discussed.<>

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Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing

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