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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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Proceedings ArticleDOI
An Ultra-Low Power Sigma-Delta Neuron Circuit
Manu V Nair,Giacomo Indiveri +1 more
TL;DR: This paper proposes a new ΣΔ neuron circuit that addresses some of the limitations in existing implementations and presents simulation results that quantify the improvements and demonstrates how the sigma-delta interpretation enables mapping of real-valued Recurrent Neural Networks to the spiking framework to emphasize the envisioned application of the proposed circuit.
Proceedings ArticleDOI
Fixed-Point Fast Decoding of the Silver Code
Yiyue Wu,Linda M. Davis +1 more
TL;DR: This paper studies the fixed-point implementation of the quadratic decoding with the aims of low hardware cost (area, power) and fast decoding response while retaining decoding performance.
Proceedings Article
Neuronal Spike Generation Mechanism as an Oversampling, Noise-shaping A-to-D converter
TL;DR: The spike-generation mechanism can be viewed as an oversampling and noise-shaping AD converter that encodes rectified low-pass filtered summed synaptic currents into a spike train linearly decodable in post-synaptic neurons.
Proceedings ArticleDOI
Teaching and research in FPGA based Digital Signal Processing using Xilinx System Generator
TL;DR: The approach is based on the Xilinx System Generator for DSP tool, which integrates itself with the MATLAB based Simulink Graphics environment and relieves the user of the textual HDL programming.
Journal ArticleDOI
The Golden Ratio Encoder
TL;DR: In this paper, the authors proposed a robust implementation of a beta-encoder where the value of the base beta is equal to the golden mean, and they extended this result by allowing for imperfect analog multipliers with imprecise gain values.
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.