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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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Hybrid continuous-discrete-time multi-bit delta-sigma A/D converters with auto-ranging algorithm
TL;DR: An auto-ranging algorithm is developed in this thesis to overcome the limitation of a large-size quantizer under low-voltage supply and a hybrid continuous-discrete-time approach is used to take advantage of the accuracy of switched-capacitor circuits and the low power consumption of continuous-time implementation.
Proceedings ArticleDOI
Wide-band frequency synthesis using hardware-efficient band-pass single-bit multi-step look-ahead sigma-delta modulators
TL;DR: The hardware requirements of MSLASDMs are demonstrated and an all-digital frequency synthesizer architecture based on band-pass MSLA SDMs is proposed, which can significantly reduce the required hardware complexity, while retaining the advantages of look-ahead SDMs.
Journal ArticleDOI
A Dynamic Source-Follower Integrator and Its Application to ΔΣ Modulators
TL;DR: A switched-capacitor integrator based on dynamic source follower amplifiers and its successful operation has been confirmed by transistor-level circuit simulation and the power dissipation can be reduced to approximately one-eighth that of conventional integrators.
Journal ArticleDOI
Research on Characteristics of Audio DAC Sigma-Delta Modulator on Field Programmable Gate Array
V. Puidokas,A. J. Marcinkevičius +1 more
TL;DR: The original architectural scheme of a designed audio Sigma Delta DAC on the FPGA whose application in a computer sound system allows refusing of an analogue sound track and improving the sound quality is presented and modelling results of the audio interpolator filters transmission characteristics and the Sigma Delta modulator’s quantization noise parameters are given.
Proceedings ArticleDOI
A 2.7-mW 145dB-SQNR sigma delta modulator
TL;DR: A high resolution low power sigma delta modulator for analog to digital conversion (ADC) over 20 KHz range is presented and a CIFB topology is chosen to implement the modulator which supports stable operation at large resolution.
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.