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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 1 MHz bandwidth, filtering continuous-time delta-sigma ADC with 36 dBFS out-of-band IIP 3 and 76 dB SNDR
TL;DR: The high dynamic range of CTΔΣMs used in wireless receivers, needed to accommodate large out-of-band interferers, can be reduced by using a filter up front, but using a Rauch filter instead yields higher out- of-band linearity due to the passive-RC filtering inherent in the RauCh structure.
Journal ArticleDOI
A Time-Interleaved 2 nd -Order ΔΣ Modulator Achieving 5-MHz Bandwidth and 86.1-dB SNDR Using Digital Feed-Forward Extrapolation
TL;DR: A digital feed-forward extrapolation by first digitizing the internal analog nodes’ information from one channel, and then extrapolating the other channels in the digital domain, thus reducing analog hardware overheads in this time-interleaved 2nd-order discrete-time (DT) delta-sigma modulator (DSM).
Proceedings ArticleDOI
Performance comparison between PWM and SSDM techniques in interleaved boost converter
TL;DR: In this article, the performance comparison between two famous techniques used to drive power switches; pulse width modulation (PWM) and simplified sigma delta modulation (SSDM) is presented.
Proceedings ArticleDOI
Switch-mode power amplifier linearization
D.E. Kelly,K. Mekechuk,T. Miller +2 more
TL;DR: In this paper, a continuous time band-pass delta sigma modulator was designed and fabricated in a 0.18 mum SiGe BiCMOS process, which was designed to accept an analog intermediate frequency input up to 100 MHz.
Proceedings ArticleDOI
Average inductor current sensor for digitally-controlled switched-mode power supplies
TL;DR: In this paper, a simple feedback sensor capable of high-resolution average inductor current sensing using two analog comparators and an analog low-pass filter is proposed, which requires very few external components and employs minimal digital hardware resources.
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.