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
A Delta-Sigma Modulator With a Widely Programmable Center Frequency and 82-dB Peak SNDR
TL;DR: Novel methods for quantizing and implementing the digitally programmable modulator coefficients enable performance comparable to state-of-the-art discrete-time fixed- frequency modulators at any center frequency from DC to 0.31 fs in steps of 0.0052 fs.
Journal ArticleDOI
An All-Digital, Single-Bit RF Transmitter for Massive MIMO
TL;DR: It is demonstrated that all-digital transmitters can be employed to reduce size, cost, and engineering effort of heavily parallelized transmit architectures and prove that the key specifications of mobile communication standards can be met utilizing dedicated integrated circuits or even by using off-the-shelf FPGAs and their high-speed interfaces.
Journal ArticleDOI
A 1.2-V 165-/spl mu/W 0.29-mm 2 Multibit Sigma-Delta ADC for Hearing Aids Using Nonlinear DACs and With Over 91 dB Dynamic-Range
TL;DR: The design and experimental evaluation of a multibit Sigma-Delta (ΣΔ) modulator with enhanced dynamic range (DR) through the use of nonlinear digital-to-analog converters (DACs) in the feedback paths is described.
Journal ArticleDOI
A 25-µW All-MOS Potentiostatic Delta-Sigma ADC for Smart Electrochemical Sensors
Stepan Sutula,Jofre Pallares Cuxart,Javier Gonzalo-Ruiz,Francesc Xavier Munoz-Pascual,Lluis Teres,Francisco Serra-Graells +5 more
TL;DR: A low-power all-MOS delta-sigma ADC specifically optimized for the potentiostatic biasing and amperometric read-out of electrochemical sensors with minimal analog circuits fully integrable in purely digital CMOS technologies is presented.
Journal ArticleDOI
Bandpass Sigma–Delta Modulator Employing SAW Resonator as Loop Filter
Rui Yu,Yong Ping Xu +1 more
TL;DR: With the proposed anti-resonance cancellation and loop filter phase compensation techniques, a second- and a fourth-order BP sigma-delta modulators employing surface acoustic wave resonators as loop filters are demonstrated in a 0.35-mum CMOS 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.