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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Book ChapterDOI
Digitally-Based Calibration Techniques for RF \Upsigma \Updelta Modulators
TL;DR: A calibration technique for Noise Transfer Function (NTF) optimization of Continuous-Time Sigma Delta (CT \( \Upsigma \Updelta \)) modulators is presented and uses a simple test signature to measure both in-band and out-of-band loop behavior.
Proceedings ArticleDOI
VCO based Nyquist-rate ADC with F VCO of F s /2
TL;DR: This work provides an intuitive explanation of input modulated parallel ADCs and proposes a 32-channel VCO based ADC operating at a sampling rate, Fs, of 200 MHz and achieving an SNR of 65-dB, with the VCOs in each channel oscillating at a meagre frequency.
Book ChapterDOI
Fully Digital Low-Power Implementation of an Audio Front-End for Portable Applications
TL;DR: This work presents a fully digital implementation of an audio front-end for portable applications developed in a low-power perspective that acquires audio samples through a four digital Pulse Digital Modulation microphones array and implements two-channel beamformers to perform speech enhancement.
Stability analysis and system design of sigma-delta modulators
TL;DR: A system design with new empirical stability criteria for sigma-delta modulators is proposed, and several stability criteria of different targets (e.g., architectures, oversampling ratios, and multi-bit) are found.
A Single-Bit 2nd-Order CIFF Delta-Sigma Modulator for Precision Measurement of Battery Current
Gi-Gyeong Bae,Ji-Min Cheon +1 more
TL;DR: A single-bit 2nd-order delta-sigma modulator with the architecture of cascaded-of-integrator feedforward (CIFF) is proposed for precision measurement of current flowing through a secondary cell battery in a battery management system (BMS).
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.