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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Proceedings ArticleDOI
A novel optimization method for CT sigma-delta-modulators using a switched system model
TL;DR: An approach to analyse the stability of continuous time ΣΔ data converters is presented and a new method to define optimized parameter sets without a large number of simulations is shown.
Proceedings ArticleDOI
Gate signal jitter elimination and noise shaping modulation for high-SNR Class-D power amplifiers
TL;DR: In this article, a jitter elimination technique for the transistor gate signals in power electronic converters is presented and verified, which enables half-bridge output voltage SNR values of more than 100dB in an open-loop system.
Proceedings ArticleDOI
A low-cost first-order sigma-delta converter design and analysis
Ma Li Ya,Sheroz Khan,Anis Nurashikin Nordin,Ahm Zahirul Alam,Jamaludin Bin Omar,Khalid A. Saeed Al-Khateeb,Muhammad Rafiqul Islam,Ahmed Wathik Naji +7 more
TL;DR: The design and analysis of an interface circuit for MEMS or biomedical sensor applications that performs the function of an analog-to-digital converter is presented and it is proved that sigma-delta is performing better in the case of weak signals acquisition.
Proceedings ArticleDOI
Analysis of ΔΣ-synchronization in wireless sensor nodes
TL;DR: The use of a ΔΣ-modulator in the nodes of a wireless sensor network, which is a new method to achieve long term synchronization, is analysed and a relation between synchronization accuracy and word length of the internal arithmetic is shown.
Proceedings ArticleDOI
STF optimization of 1-bit CT ΣΔ modulators based on scaled loop filter coefficients
TL;DR: It is shown that, depending on the initial design, it is possible to define optimized parameter sets with increased performance and remaining flat STF or sets with constant performance and reduced STF peaking.
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.