Resonator-based multi-stage ΣΔ modulator for wideband applications with improved dynamic range

被引：4
|
作者：
Chang, TH [1 ]
Dung, LR [1 ]
机构：
[1] Natl Chiao Tung Univ, Dept Elect & Control Engn, Hsinchu 30050, Taiwan
来源：
ELECTRONICS LETTERS | 2004年 / 40卷 / 11期
关键词：
D O I：
10.1049/el:20040450
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：
A new design methodology for wideband, multi-stage, multi-bit YEA modulators (SigmaDeltaMs) with improved dynamic range, is presented. The key to improving dynamic range is to have the first stage oscillated, then the coarse quantisation noise vanishes and hence circuit nonlinearities do not cause a leakage quantisation noise problem. Based on the proposed methodology, a fourth-order four-bit SigmaDeltaM can achieve the dynamic range of 80 dB at the OSR of 8 without using additional calibration techniques.
引用
收藏
页码：652 / 654
页数：3
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