Techniques for preventing tonal behavior of data weighted averaging algorithm in Σ-Δ modulators

被引：28

作者：

Vadipour, M ^{[1
]}

机构：

[1] Teradyne Inc, Agoura Hills, CA 91301 USA

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-ANALOG AND DIGITAL SIGNAL PROCESSING | 2000年 / 47卷 / 11期

关键词：

A/D and D/A converters; data-weighted averaging; sigma-delta modulators;

D O I：

10.1109/82.885121

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Two techniques for prevention of in-band tones in DW;I mismatch noise shaping algorithm are presented. "Offset technique" moves in-band tones away from baseband, improving SNR by similar to 10 dB, and attenuates maximum in-band tone by as much as similar to 25 dB, "Randomized DWA" is a combination of simultaneous randomization and DWA, which attenuates tonal behavior in all frequencies, preventing aliasing of tones or tone shifting for any arbitrary input signal.

引用

页码：1137 / 1144

页数：8

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