多级σ - δ调制器中的过载

AP-ASIC'99. First IEEE Asia Pacific Conference on ASICs (Cat. No.99EX360) Pub Date : 1999-08-23 DOI:10.1109/APASIC.1999.824074

M. H. Chow, P. K. Chan, L. Siek

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引用次数: 1

摘要

本文提出了一种直接优化多级(MASH) sigma-delta调制器缩放系数的方法。用于对抗过载影响的缩放系数显示与1位D/A转换器的参考电压有关。最后，提出了一种优化的扩展动态范围的2-1-1调制器。该调制器使用本地反馈回路将动态范围(DR)扩展到满量程输入电平而不会过载。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Overloading in multistage sigma-delta modulators

This paper presents a straightforward way to optimize scaling coefficients used in multistage (MASH) sigma-delta modulators. The scaling coefficients used to counter the effects of overloading are shown to be related to the reference voltage of the 1-bit D/A converter. Finally, an optimized 2-1-1 modulator with an extended dynamic range is proposed. This modulator uses a local feedback loop to extend the dynamic range (DR) to full-scale input level without overloading.

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AP-ASIC'99. First IEEE Asia Pacific Conference on ASICs (Cat. No.99EX360)

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