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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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Journal ArticleDOI
A Low-Power CMOS Analog Front-End IC with Adjustable On-Chip Filters for Biosensors
TL;DR: In this paper, a dual AC/DC-coupled IC for bio-sensor applications is presented, which can sense the AC content of the biosignal by attenuating the unwanted DC component.
Journal ArticleDOI
On Continuous-Time $\Delta\Sigma$ Modulators With Return-to-Open DACs
TL;DR: It is shown that using an RTO DAC can compromise the alias rejection of the CTDSM around odd multiples of the sampling rate, and a circuit technique is proposed that mitigates this problem.
Proceedings ArticleDOI
Comparison of opamp-based and comparator-based delta-sigma modulation
TL;DR: This work demonstrates a 2nd-order DeltaSigma converter designed using the CBSC technique, which provides a great simplification of design effort and significant power savings compared to the traditional OTA-based methods.
Journal ArticleDOI
Analysis and Design of a Discrete-Time Delta-Sigma Modulator Using a Cascoded Floating-Inverter-Based Dynamic Amplifier
TL;DR: In this article , a delta-sigma modulator using a cascoded floating-inverter-based dynamic amplifier is presented, which achieves more than 50dB dc gain while maintaining an HD3 of better than 110 dBc for signal swings less than 0.
Journal ArticleDOI
A 1-V 5-MHz Bandwidth 68.3-dB SNDR Continuous-Time Delta-Sigma Modulator With a Feedback-Assisted Quantizer
TL;DR: A low-power continuous-time delta-sigma modulator (CTDSM) incorporating a multi-bit feedback-assisted quantizer (FBAQ) is presented in this paper, which is optimized for low-voltage swing operation.
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.