Open AccessBook
Understanding Delta-Sigma Data Converters
TLDR
This chapter discusses the design and simulation of delta-sigma modulator systems, and some of the considerations for implementation considerations for [Delta][Sigma] ADCs.Abstract:
Chapter 1: Introduction.Chapter 2: The first-order delta-sigma modulator.Chapter 3: The second-order delta-sigma modulator.Chapter 4: Higher-order delta-sigma modulation.Chapter 5: Bandpass and quadrature delta-sigma modulation.Chapter 6: Implementation considerations for [Delta][Sigma] ADCs.Chapter 7: Delta-sigma DACs.Chapter 8: High-level design and simulation.Chapter 9: Example modulator systems.Appendix A: Spectral estimation.Appendix B: The delta-sigma toolbox.Appendix C: Noise in switched-capacitor delta-sigma data converters.read more
Citations
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Journal ArticleDOI
A 89-dB DR 457-μW 20-kHz bandwidth delta-sigma modulator with gain-boosting OTAs
TL;DR: In this paper, a low-power, high-resolution delta-sigma modulator for use in portable devices is presented, which uses a mixed-loop topology, having both feedback and feedforward paths.
Proceedings ArticleDOI
Improved Delta Sigma Modulators for high speed applications
TL;DR: In this article, a new LowPass Delta Sigma Modulators (LPDS) architecture is presented to improve the noise shaping for high frequency applications, where the errors resulting from approximations made by calculating with 1/2N coefficients are compensated.
Proceedings ArticleDOI
Digital-to-analog converter considerations for achieving a dynamic range of 1 ppm in precision mechatronics systems
TL;DR: A resistor string digital-to-analog converter topology employing noise-shaping is presented and the contribution of each noise source in this topology is described in order to specify the necessary parameters to achieve a given resolution.
Journal ArticleDOI
A Polyphase Filter Design for Continuous-Time Quadrature Bandpass Sigma–Delta Modulators
TL;DR: This paper presents a strategy for successful polyphase-filter design for continuous-time quadrature bandpass sigma-delta (SigmaDelta) modulators using a low-pass filter with a chain of integrators with weighted capacitive feedforward summation topology and proposes a new compensation scheme.
Journal Article
Novel Architecture of Feedforward Second-Order Multibit Delta-Sigma-AD Modulator.
Hao San,Hajime Konagaya,Feng Xu,Atsushi Motozawa,Haruo Kobayashi,Kazumasa Ando,Hiroshi Yoshida,Chieto Murayama,Kanichi Miyazawa +8 more
TL;DR: A novel architecture of a feedforward ΔΣAD modulator which realizes the summation of feedforward signals without additional amplifier is proposed which is functionally equivalent to the conventional one but with smaller chip area and lower power dissipation.
References
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Journal ArticleDOI
A higher order topology for interpolative modulators for oversampling A/D converters
TL;DR: Higher order modulators are shown not only to greatly reduce oversampling requirements for high-resolution conversion applications, but also to randomize the quantization noise, avoiding the need for dithering.
Journal ArticleDOI
Decimation for Sigma Delta Modulation
TL;DR: It is shown that digital filters comprising cascades of integrate-and-dump functions can match the structure of the noise from sigma delta modulation to provide decimation with negligible loss of signal-to-noise ratio.
Journal ArticleDOI
An analysis of nonlinear behavior in delta - sigma modulators
Sasan H. Ardalan,J.J. Paulos +1 more
TL;DR: This paper introduces a new method of analysis for deltasigma modulators based on modeling the nonlinear quantizer with a linearized gain, obtained by minimizing a mean-square-error criterion, followed by an additive noise source representing distortion components.
Book ChapterDOI
The Structure of Quantization Noise from Sigma-Delta Modulation
James C. Candy,O. Benjamin +1 more
TL;DR: Simple algebraic expressions for this modulation noise and its spectrum in terms of the input amplitude are derived and can be useful for designing oversampled analog to digital converters that use sigma-delta modulation for the primary conversion.
Journal ArticleDOI
A fourth-order bandpass sigma-delta modulator
TL;DR: The modulator of a bandpass analog/digital (A/D) converter, with 63 dB signal/noise for broadcast AM bandwidth signals centered at 455 kHz, has been implemented by modifying a commercial digital-audio sigma-delta ( Sigma Delta ) converter.