Excess loop delay compensation for continuous-time ΔΣ modulators using interpolation

被引：4
|
作者：
Alamdari, H. Hanafi [1 ]
El-Sankary, K. [1 ]
El-Masry, E. [1 ]
机构：
[1] Dalhousie Univ, Dept Elect & Comp Engn, Microelect Res Lab, Halifax, NS B3J 2X4, Canada
来源：
ELECTRONICS LETTERS | 2009年 / 45卷 / 12期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1049/el.2009.0584
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 excess loop delay compensation technique for continuous-time Delta Sigma-modulators by using signal interpolation is presented. This technique uses an auxiliary differentiator in the feedforward path to construct a signal interpolation at the input of the quantiser to enable an early decision that compensates for excess loop delay. A simple tuning for the interpolation coefficient makes this technique suitable for lowpass, as well as bandpass, modulators. The proposed technique enables the compensation of any amount of delay and does not impose modi. cation on loop filter transfer function or circuitry.
引用
收藏
页码：609 / U10
页数：2
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