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Understanding Delta-Sigma Data Converters
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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
Quantization Noise Analysis of Time-to-Digital-Converter-Based All-Digital Phase-Locked Loop and Frequency Discriminators
Sungkyung Park,Chester Park +1 more
TL;DR: It is newly derived that the TDC noise component caused by the delta-sigma modulator (DSM) and the finite resolution of the digitally controlled oscillator is not white, which can give some insight into the design of low-noise ADPLLs.
Journal ArticleDOI
Design and Implementation of a Second Order Continuous-Time ΣΔ Modulator for ECG Signal Acquisition
TL;DR: In this paper , a second-order CT-ΣΔM with Cascade of Integrators Feed-Forward (CIFF) architecture is proposed for continuous supervision of cardiovascular signs of high-risk patients.
Quasi 2-bit 32-QAM OFDM based Digital RoF Link by Delta-sigma Modulation at 2.5 Gbit/s
TL;DR: In this paper , the quasi 2-bit delta-sigma modulated 32-QAM-OFDM based DRoF link was implemented and discussed in detail, and the proposed link structure boosted the robust anti-nonlinearity and cost effective RRHs, which was appropriate for the beyond 5G applications.
Journal ArticleDOI
Quiet sigma delta quantization, and global convergence for a class of asymmetric piecewise-affine maps
TL;DR: In this article, the authors introduce a family of second-order sigma delta quantization schemes for analog-to-digital conversion which are "quiet": quantization output is guaranteed to fall to zero at the onset of vanishing input, and prove that the origin is a globally attractive fixed point for the related family of asymmetrically damped piecewiseaffine maps.
Proceedings ArticleDOI
A 200 KHz bandwidth ΣΔ DAC with a spur free modulator
TL;DR: In this paper, a sigma-delta digital to analog converter (ΣΔDAC) with a high pass dither block can eliminate harmonic spurs without increasing the noise floor in band.
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.