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
More filters
Dissertation
Contribution à la conception d'un modulateur sigma-delta passe-bande à temps continu pour la conversion directe de signaux radiofréquences
TL;DR: In this article, the authors present a methodologie de conception based on simulations multi-niveaux (transistor, fonctionnel), which permet d'isoler l'impact des non-idealites de chacun des blocs au niveau circuit sur le fonoctionnement general du modulateur.
Journal ArticleDOI
Influence of Initial Conditions on the Fundamental Periods of LFSR-Dithered MASH Digital Delta–Sigma Modulators With Constant Inputs
Hongjia Mo,Michael Peter Kennedy +1 more
TL;DR: This brief shows that bad LFSR initial conditions can lead to ineffective dithering, producing short cycles and strong tonal behavior, and explains how to set the initial state of the DDSM as a function of the initialState of the L FSR in order to obtain a maximum-length dithered output.
Journal ArticleDOI
A 6.5–8.1-GHz Communication/Ranging VWB Transceiver for Secure Wireless Connectivity With Enhanced Bandwidth Efficiency and $\Delta\Sigma$ Energy Detection
TL;DR: A pulse-based transceiver architecture for mobile authentication with location verification, using frequency-hopping very-wideband pulse generation for bandwidth-efficient pulse transmission and a noncoherent energy detection receiver for TOF-based ranging to have demodulation with low power and low latency.
Dissertation
A digital up-conversion architecture for future high efficiency wireless base stations
TL;DR: Digital signal processing techniques used for signal modulation are extended to digital up-conversion to generate suitable drive signals for the SMPA, using a sigma-delta based technique to embed a complex modulation scheme such as OFDM into a single ‘on’-‘off’ bit stream.
Journal ArticleDOI
A comparative design study of continuous-time incremental sigma-delta ADC architectures
TL;DR: A comparative design study of continuous‐time (CT) incremental sigma‐delta (IΣΔ) ADCs, which can expand another dimension of the IΣ Δ ADC world that is dominated by discrete‐time implementations.
References
More filters
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.