Open AccessBook
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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Journal ArticleDOI
Frequency-Agile Multiband Quadrature Sigma-Delta Modulator for Cognitive Radio: Analysis, Design and Digital Post-Processing
TL;DR: A novel frequency-agile and reconfigurable transfer function design, allowing digital post-compensation of the MFI, is proposed, based on a novel closed-form transfer function model for higher-order quadrature Σ� Δ modulators (QΣΔMs) under implementation inaccuracies, proposed herein.
Journal ArticleDOI
Analysis of a Broadband High-Efficiency Switch-Mode $\Delta \Sigma $ Supply Modulator Based on a Class-E Amplifier and a Class-E Rectifier
TL;DR: In this paper, a broadband high-efficiency supply modulator is proposed, with a node controlled by the ΔΣ modulator's output, consisting of a conventional Class-E amplifier and a Class E rectifier, and its performance for broadband envelopes amplification is analyzed using numerical difference equations.
Journal ArticleDOI
Two-Tone Signal Generation for ADC Testing
Keisuke Kato,Fumitaka Abe,Kazuyuki Wakabayashi,Chuan Gao,Takafumi Yamada,Haruo Kobayashi,Osamu Kobayashi,Kiichi Niitsu +7 more
TL;DR: Eight methods to precompensate for the IMD using DSP algorithms and produce low-IMD two-tone signals using an arbitrary waveform generator or a multi-bit ΣΔ DAC inside an SoC.
Proceedings ArticleDOI
Low-noise sigma-delta capacitance-to-digital converter for Sub-pF capacitive sensors with integrated dielectric loss measurement
Markus Bingesser,Teddy Loeliger,Werner Hinn,Johann Hauer,Stefan Mödl,Robert Dorn,Matthias Völker +6 more
TL;DR: An integrated dielectric loss measurement circuit by means of two parallel channels with different integration times offers a complex permittivity measurement in a single-chip solution.
Microphone array processing for augmented listening
TL;DR: This work explores the bene ts of large microphone arrays, including novel wearable devices and distributed sensor networks, for augmented listening systems and would dramatically improve the performance of listening devices in noisy environments and enable new listening applications that are impossible with current technology.
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.