Adaptive high performance ΣΔ modulator designs

被引：0

作者：

Goekdel, Y. Daghan ^{[1
]}

Talay, Selcuk ^{[1
]}

Duendar, Guenhan ^{[1
]}

机构：

[1] Bogazici Univ, Dept Elect & Elect Engn, TR-34342 Istanbul, Turkey

来源：

2007 PH.D RESEARCH IN MICROELECTRONICS AND ELECTRONICS | 2007年

关键词：

D O I：

暂无

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：

In this paper, different solutions to the saturation problem of the integrator building block of Sigma-Delta (SD) modulators are proposed. Saturation causes an error that limits the dynamic input range of SD A/D converters and consequently decreases its SNR The proposed structure, using a variable gain integrator followed by a non-uniform quantizer as companding, makes the usage of higher input levels to the A/D converter possible. Also with speech signals in which very high and very low signals reside, this architecture performs much better.

引用

页码：281 / 284

页数：4

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