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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 low-power 2nd-order CT ΔΣ modulator with an asynchronous SAR quantizer
TL;DR: This paper presents a multi-bit continuous-time ΔΣ modulator intended for ultra-low-power radios that features a 2nd-order loop filter implemented with a single operational amplifier to reduce the power consumption.
Digitally Enhanced Wireless Transceivers for Multi-mode Reconfigurable Radios
TL;DR: The benefits of going digital in a system that has until now been dominated by analog or discrete-time signal processing are discussed and prototype architectures for a radio receiver and transmitter that employ a range of signal processing techniques to enable high-throughput, power-efficient systems are presented.
Proceedings ArticleDOI
System-level Design of Single-bit Sigma-Delta Modulators Based on MSA and SNR Data Graphics
Raphael A. C. Viera,Jorge de La Cruz,André Luiz Aita,Cesar Augusto Prior,João Baptista dos Santos Martins +4 more
TL;DR: This paper presents a more comprehensive approach for the design of single-bit single-loop sigma-delta modulators, either in continuous or discrete-time domain, based on SNR and MSA data graphics generated for second-, third- and fourth-order modulators.
Design of Continuous Time Multibit Sigma Delta ADC for Next Generation Wireless Applications
TL;DR: The proposed topology is a 3rd order low-pass sigma-delta modulator, which employs a combination of feedforward and feedback schemes, which can provide high DR and SNR over a 20 MHz signal bandwidth.
Journal ArticleDOI
A 77.3-dB SNDR 62.5-kHz Bandwidth Continuous-Time Noise-Shaping SAR ADC With Duty-Cycled Gm-C Integrator
TL;DR: In this article , a first-order continuous-time (CT) noise-shaping successive-approximation-register (NS-SAR) analog-to-digital converter (ADC) is presented.
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.