Book contents
- Frontmatter
- Contents
- Contributors
- Preface
- Part I Introduction to digital front-end
- Part II DPD and CFR
- Part III DUC, DDC, ADC, DAC, and NCO
- 12 Digital down-conversion and up-conversion
- 13 A/D and D/A data conversion for wireless communications transceivers
- 14 Advanced quadrature sigma-delta modulator designs for A/D interface
- 15 Digital suppression of A/D interface nonlinearities
- Part IV Digital calibration, imbalance compensation, and error corrections
- Part V Circuits and system integration in digital front-end
- Index
- References
14 - Advanced quadrature sigma-delta modulator designs for A/D interface
from Part III - DUC, DDC, ADC, DAC, and NCO
Published online by Cambridge University Press: 07 October 2011
Edited by
Book contents
- Frontmatter
- Contents
- Contributors
- Preface
- Part I Introduction to digital front-end
- Part II DPD and CFR
- Part III DUC, DDC, ADC, DAC, and NCO
- 12 Digital down-conversion and up-conversion
- 13 A/D and D/A data conversion for wireless communications transceivers
- 14 Advanced quadrature sigma-delta modulator designs for A/D interface
- 15 Digital suppression of A/D interface nonlinearities
- Part IV Digital calibration, imbalance compensation, and error corrections
- Part V Circuits and system integration in digital front-end
- Index
- References
Summary
Sigma-delta basics
The principle of oversampling the analog-to-digital converter (ADC) with negative feedback has been invented decades ago and is still being developed further by scientists all over the world. Today’s state-of-the-art converters have come a long way from the first ADCs employing the ΣΔ principle in the 1960s. There is quite a broad selection of ΣΔ oriented publications in the literature since the 1960s and early development phases have also been documented in a comprehensive manner, e.g., in [2], [4] and [52]. On the basis of [2], and following the outline of [35], this chapter aims to present the theory and technology of the advanced quadrature sigma-delta modulator designs for A/D interface. The chapter is organized into six sections. In the rest of the first section, we outline the basics of sigma-delta modulation. Section 14.2 is devoted to extending the discussion on some further modulator concepts and selected advanced quadrature structures will be presented in Section 14.3. Related implementation nonidealities are discussed in Section 14.4. Section 14.5 gives some simulation examples on the advanced structures introduced in Section 14.3, taking also circuit nonidealities into account. Section 14.6 will present related conclusions.
The origin of modern ΣΔ modulation is in delta modulation and differential pulse-code modulation (PCM). Delta modulation was invented in ITT laboratories in France in 1946, as was also the classical version of the PCM. Differential PCM system was patented in 1950 by Bell Telephone Labs.
- Type
- Chapter
- Information
- Digital Front-End in Wireless Communications and BroadcastingCircuits and Signal Processing, pp. 413 - 449Publisher: Cambridge University PressPrint publication year: 2011
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