Double-index averaging: a novel technique for dynamic element matching in ∑-△ A/D converters

Dario Cini; Carlo Samori; Andrea L. Lacaita

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Double-index averaging: a novel technique for dynamic element matching in ∑-△ A/D converters

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摘要

We report the study of a second-order∑—△ modulator for audio applications with a nine-levels quantizer. The feedback digital-to-analog has been implemented with four capacitors and two voltage references, taking the structure typical of fullydifferential systems. We first discuss the performance achievable with the most popular dynamic element-matching techniques, namely the data-weighted averaging and individual-level averaging. We then introduce a new algorithm, the double-index averaging,that performs better than the other algorithms by 10-15 dB over the entire dynamic range of the modulator, and 6 dB at the peak of signal/(quantization noise＋total harmonic distortion).

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《IEEE Transactions on Automatic Control》 |1999年第4期|353-358|共6页
作者
Dario Cini; Carlo Samori; Andrea L. Lacaita;
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原文格式 PDF
正文语种英语
中图分类自动化系统;
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Analog-digital conversion; Sigma-delta modulation;

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Double-index averaging: a novel technique for dynamic element matching in ∑-△ A/D converters

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