Journal ArticleDOI
A fourth-order bandpass sigma-delta modulator
S. Jantzi,William Martin Snelgrove,P.F. Ferguson +2 more
- Vol. 28, Iss: 3, pp 282-291
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TLDR
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.Abstract:
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. It is the first reported fully monolithic implementation of bandpass noise shaping and has applications to digital radio. >read more
Citations
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Book
Understanding Delta-Sigma Data Converters
TL;DR: This chapter discusses the design and simulation of delta-sigma modulator systems, and some of the considerations for implementation considerations for [Delta][Sigma] ADCs.
Journal ArticleDOI
An overview of sigma-delta converters
TL;DR: This article describes conventional A/D conversion, as well as its performance modeling, and examines the use of sigma-delta converters to convert narrowband bandpass signals with high resolution.
Journal ArticleDOI
A single-chip 900 MHz CMOS receiver front-end with a high performance low-IF topology
Jan Crols,Michiel Steyaert +1 more
TL;DR: In this paper, an analog receiver front end chip realized in a 0.7 /spl mu/m CMOS technology is presented, which achieves a phase accuracy of less than 0.3/spl deg/ in a large passband around 900 MHz without requiring any external component or any tuning or trimming.
Journal ArticleDOI
Sigma-Delta Modulators: Tutorial Overview, Design Guide, and State-of-the-Art Survey
TL;DR: A review of the state of the art on nanometer CMOS implementations is described, giving a survey of cutting-edge ΣΔ architectures, with emphasis on their application to the next generation of wireless telecom systems.
Journal ArticleDOI
Complex signal processing is not complex
TL;DR: A tutorial review of complex signal processing for wireless applications emphasizing a graphical and pictorial description rather than an equation-based approach is presented.
References
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Journal ArticleDOI
Random error effects in matched MOS capacitors and current sources
TL;DR: Results indicate that a 9-bit matching accuracy can be obtained for capacitors and an 8-bit accuracy for MOS current sources without difficulty if the systematic error sources are reduced using proper design and layout techniques.
Journal ArticleDOI
A unity bit coding method by negative feedback
TL;DR: Signal-to-noise performances of a unity bit coding method and the characteristics of an experimental video encoder based upon the principle suggest that the proposed system well fulfills the purpose.
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
Bandpass sigma-delta modulation
Richard Schreier,M. Snelgrove +1 more
TL;DR: In this paper, a bandpass version of sigma-delta modulation is presented, with simulation results for second and fourth-order convertors operating at 8 MHz, and simulations demonstrate a resolution of 16 bits over an 8 kHz band centred at 1 MHz.
Journal ArticleDOI
Low-sensitivity digital ladder filters
TL;DR: In this paper, a class of low-sensitivity digital ladder filters may be realized in the voltage-current domain by direct analogy with the continuous resistively terminated LC ladder filter by using transformations that correspond to LC elements that exhibit finite Cube factors.