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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 Wide Dynamic-Range Low-Power Signal Conditioning Circuit for Low-Side Current Sensing Application
TL;DR: Simulations show that the overall system, i.e., PGA and ΔΣ-ADC, achieves a dynamic range in excess of 80 dB while consuming 2 mA, and the analog-to-digital converter, which digitizes the amplified signal works at high frequency to achieve high dynamic range.
A ratio metric analog-to-digital converter for eddy current displacement sensors
TL;DR: In this article, the authors describe the implementation of a ratio metric analog-to-digital converter (ADC) for an eddy current displacement sensor interface, which consists of a low-power front-end oscillator and a synchronous demodulator.
Proceedings ArticleDOI
Asymmetric pulse width modulated envelope signal in an EER architecture for WLAN
TL;DR: In this article, a general time-domain model is constructed and utilized to identify the impact on the overall system performance, and three ideas to utilize the phenomenon are demonstrated, with improvements of 3 dB to the critical linearity requirement (knee of the WLAN mask).
Journal ArticleDOI
Optimal FIR Filter Design based on Curve Fitting Approximation for Uncertain 2–1 Sigma–Delta Modulator
TL;DR: A design method based on curve fitting approximation for uncertain linearized model of the modulator which is simple in principle and practical in application is proposed and results show that the optimal filter has better performance on multiple validations when compared to other modulator filters.
Proceedings ArticleDOI
The inconvenient truth about alias rejection in continuous time ΔΣ converters
TL;DR: It is shown that this is not the case when a switched capacitor (SC) feedback DAC is used, thereby nullifying one of the principal advantages of continuous-time operation.
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.