Structure and features of sigma-delta modulators

被引：0

作者：

Puidokas, V. ^{[1
]}

Marcinkevicius, A. J. ^{[1
]}

机构：

[1] Vilnius Gediminas Tech Univ, Dept Comp Engn, LT-03227 Vilnius, Lithuania

来源：

ELEKTRONIKA IR ELEKTROTECHNIKA | 2008年 / 04期

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：

The article highlights the main advantages of Sigma-Delta (Sigma Delta) converters comparing to Nyquist-rate converters. For the sake of comparison there are presented the main technical characteristics of industrial digital-to-analogue converters (DACs), the description of an Sigma Delta DAC structure in case of a 1-bit and multibit quantizer, the analytical description of operation of a 1st order modulator as well as presentation of noise shaping. Also, the analysis of clearer noise shaping was given. Some discussion on application of modulators in power DACs accompanied with its won nuances was presented. There were given several variants on how to increase signal-to-noise ratio (through increasing of oversampling ratio, heightening the order, increasing the number of steps and using multibit quantizers), as well as some problems which arise and aren't solved in powerful Sigma Delta DACs. I11. 10, bibl. 11 (in English; summaries in English, Russian and Lithuanian).

引用

页码：39 / 42

页数：4

共 11 条

[1] An enhanced first-order sigma-delta modulator with a controllable signal-to-noise ratio
Al-Alaoui, MA
Ferzli, R
[J]. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, 2006, 53 (03) : 634 - 643
[2] A new multistage noise-shaping architecture
Gupta, Ajay K.
Vasudev, N.
Collins, Oliver M.
[J]. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, 2006, 53 (10) : 2132 - 2144
[3] HUANG X, 2006, IEEE SOLID STATE INT, P2111
[4] LI X, 2006, IEEE T CIRCUITS SYST, V1, P17
[5] MALCOVATI P, SD TOOLBOX 2
[6] Transient analysis of subnanosecond integrated ADCs
Marcinkevicius A.
Poviliauskas D.
Jasonis V.
[J]. Russian Microelectronics, 2005, 34 (3) : 187 - 201
[7] Blue-noise sigma-delta modulator: Improving substrate noise and nonlinear amplifier gain effects
Moule, Eric C.
Ignjatovic, Zeljko
[J]. 2007 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOLS 1-11, 2007, : 3618 - 3621
[8] Schreier, DELTA SIGMA TOOLBOX
[9] Schreier R., 2005, Understanding DeltaSigma Data Converters
[10] YASUDA A, 2006, IEEE T CIRCUITS SYST

← 1 2 →