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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An Interleaved Multi-mode ΔΣ RF-DAC with Fully Integrated, AC Coupled Digital Input
TL;DR: This work develops a multi-mode delta-sigma (∆Σ) RF digital-to-analog converter (RFDAC) which can directly synthesize RF signals, bypassing the need for analog up-conversion and other RF processing by pushing functionality into the digital domain.
Journal ArticleDOI
A low power cascaded feed-forward delta-sigma modulator for rf wireless applications
TL;DR: This paper presents a design of a novel cascaded third-order feed-forward delta-sigma analog-to-digital converter (ADC) that produces a 12-bit resolution at a data output rate (DOR) of 2.5 MS/s for RF wireless applications and has one of the lowest power consumption.
Proceedings ArticleDOI
Odd-even quantisation and cartesian delta-sigma (ΔΣ) Upconverters for Transmitter Design
TL;DR: It is shown that the noise problem can be reduced with a new odd-quantisation scheme which is based on pulses with an odd number of clock periods, and this scheme has improved SNR by approximately 2 dB.
Dissertation
Layout-accurate ultra-fast system-level design exploration through verilog-ams
Saraju P. Mohanty,Geng Zheng +1 more
TL;DR: The research involves design centering, metamodel generation flows for creating efficient behavioral models, and Verilog-AMS integration techniques for model realization to address problems in designing analog and mixed-signal systems by bridging the gap between system-level and circuit-level simulation.
DissertationDOI
A new perspective on analog-to-digital conversion of continuous-time signals
TL;DR: This thesis describes a new perspective on analog-to-digital conversion by sampling and quantizing some state variables of the analog system and passing them to a Kalman-filter, which recovers an estimate of the input signal.
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.