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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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Proceedings ArticleDOI
A multi-bit sigma-delta modulator and new DWA used in an audio DAC
TL;DR: A high order multi-bit low-pass Sigma-Delta modulator and a DEM (Dynamic Element Matching) applied in a 24-bit audio DAC to reduce the influence of DAC nonlinearity error is described.
Proceedings ArticleDOI
A low-distortion delta-sigma modulator with ring amplifier and passive adder embedded SAR quantizer
Chunhui Pan,Hao San +1 more
TL;DR: A novel multi-bit feedforward ΔΣAD modulator for low power and high signal-to-noise-and-distortion (SNDR) application with passive-adder embedded successive approximation register (SAR) ADC which consists of capacitor array and a comparator.
Journal ArticleDOI
Design Strategies and Architectures for Ultra-Low-Voltage Delta-Sigma ADCs
Lorenzo Benvenuti,Alessandro Catania,Giuseppe Manfredini,Andrea Ria,Massimo Piotto,Paolo Bruschi +5 more
TL;DR: This work proposes an ultra-low voltage, ultra- low power, inverter-based ΔΣ modulator with reduced finite-DC-gain sensitivity, and employs a two-stage, high DC-gain, switched-capacitor integrator that applies a correlated double sampling technique for offset cancellation and flicker noise reduction.
Journal ArticleDOI
MASH ΣΔ modulator with highly reduced in-band quantisation noise
TL;DR: In this paper, a multi-stage noise-shaping ΣΔ modulator with two extra analogue paths was proposed, which achieves a one-order higher noiseshaping than the modulator's order only by using two extra analog paths.
Journal ArticleDOI
Theory and design of a CT $$\Updelta\Upsigma$$ΔΣ modulator with low sensitivity to loop-delay variations
TL;DR: In this article, a 3rd-order, 3-bit continuous-time (CT) $$\Updelta\Upsigma$$ Δ Σ modulator for an LTE radio receiver is presented, which achieves an SNR of 71 dB and an SNDR of 69 dB over a 9 MHz bandwidth with an oversampling ratio of 16.
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.