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VCO-Based Quantizers Using Frequency-to-Digital and Time-to-Digital Converters

VCO-Based Quantizers Using Frequency-to-Digital and Time-to-Digital Converters
Author: Samantha Yoder
Publisher: Springer Science & Business Media
Total Pages: 64
Release: 2011-08-28
Genre: Technology & Engineering
ISBN: 1441997229

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This book introduces the concept of voltage-controlled-oscillator (VCO)-based analog-to-digital converters (ADCs). Detailed explanation is given of this promising new class of high resolution and low power ADCs, which use time quantization as opposed to traditional analog-based (i.e. voltage) ADCs.


Analysis and Modeling of Non-idealities in VCO-based Quantizers Using Frequency-to-digital and Time-to-digital Converters

Analysis and Modeling of Non-idealities in VCO-based Quantizers Using Frequency-to-digital and Time-to-digital Converters
Author: Samantha M. Yoder
Publisher:
Total Pages: 65
Release: 2010
Genre:
ISBN:

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In summary this work presents an alternative method to using an FDC in a VCO-based quantizer which can achieve the same SNR performance with less sensitivity to sampling clock jitter.


All-standard-cell Voltage Controlled Oscillator-based Analog to Digital Converters with Digital Background Calibrations

All-standard-cell Voltage Controlled Oscillator-based Analog to Digital Converters with Digital Background Calibrations
Author: Yuke Zhang
Publisher:
Total Pages: 0
Release: 2017
Genre:
ISBN:

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An all-digital voltage controlled oscillator based analog to digital converter (VCO-based ADC) with digital background calibration is proposed in this thesis. The all-digital structure simplifies implementation procedure and reduces design cost. Different structures of all-standard-cell VCOs are presented and compared. This thesis also focuses on improving VCO's linearity. A novel compensation for all-digital VCO-based ADC is proposed, which uses closed-form orthogonal polynomials bases instead of power series ones. With these more powerful bases, cross interaction between different basis is eliminated, which leads to better resolution, lower order of compensation, and shorter convergence time. Offset-injection digital background calibration for VCO-based ADC is designed based on the proposed orthogonal polynomials nonlinearity compensation. The new technique removes in-band distortions caused by VCO nonlinearity successfully. Tradeoff between different design parameters like sampling frequency and offset value is discussed in the thesis. A smart offset injection technique for all-standard-cell VCO is also introduced.


Design of Power-Efficient Highly Digital Analog-to-Digital Converters for Next-Generation Wireless Communication Systems

Design of Power-Efficient Highly Digital Analog-to-Digital Converters for Next-Generation Wireless Communication Systems
Author: Xinpeng Xing
Publisher: Springer
Total Pages: 200
Release: 2017-10-04
Genre: Technology & Engineering
ISBN: 3319665650

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This book discusses both architecture- and circuit-level design aspects of voltage-controlled-oscillator (VCO)-based analog-to-digital converters (ADCs), especially focusing on mitigation of VCO nonlinearity and the improvement of power efficiency. It shows readers how to develop power-efficient complementary-metal-oxide-semiconductor (CMOS) ADCs for applications such as LTE, 802.11n, and VDSL2+. The material covered can also be applied to other specifications and technologies. Design of Power-Efficient Highly Digital Analog-to-Digital Converters for Next-Generation Wireless Communication Systems begins with a general introduction to the applications of an ADC in communications systems and the basic concepts of VCO-based ADCs. The text addresses a wide range of converter architectures including open- and closed-loop technologies. Special attention is paid to the replacement of power-hungry analog blocks with VCO-based circuits and to the mitigation of VCO nonline arity. Various MATLAB®/Simulink® models are provided for important circuit nonidealities, allowing designers and researchers to determine the required specifications for the different building blocks that form the systematic integrated-circuit design procedure. Five different VCO-based ADC design examples are presented, introducing innovations at both architecture and circuit levels. Of these designs, the best power efficiency of a high-bandwidth oversampling ADC is achieved in a 40 nm CMOS demonstration. This book is essential reading material for engineers and researchers working on low-power-analog and mixed-signal design and may be used by instructors teaching advanced courses on the subject. It provides a clear overview and comparison of VCO-based ADC architectures and gives the reader insight into the most important circuit imperfections.


CMOS Time-Mode Circuits and Systems

CMOS Time-Mode Circuits and Systems
Author: Fei Yuan
Publisher: CRC Press
Total Pages: 403
Release: 2018-09-03
Genre: Technology & Engineering
ISBN: 1482298740

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Time-mode circuits, where information is represented by time difference between digital events, offer a viable and technology-friendly means to realize mixed-mode circuits and systems in nanometer complementary metal-oxide semiconductor (CMOS) technologies. Various architectures of time-based signal processing and design techniques of CMOS time-mode circuits have emerged; however, an in-depth examination of the principles of time-based signal processing and design techniques of time-mode circuits has not been available—until now. CMOS Time-Mode Circuits and Systems: Fundamentals and Applications is the first book to deliver a comprehensive treatment of CMOS time-mode circuits and systems. Featuring contributions from leading experts, this authoritative text contains a rich collection of literature on time-mode circuits and systems. The book begins by presenting a critical comparison of voltage-mode, current-mode, and time-mode signaling for mixed-mode signal processing and then: Covers the fundamentals of time-mode signal processing, such as voltage-to-time converters, all-digital phase-locked loops, and frequency synthesizers Investigates the performance characteristics, architecture, design techniques, and implementation of time-to-digital converters Discusses time-mode delta-sigma-based analog-to-digital converters, placing a great emphasis on time-mode quantizers Includes a detailed study of ultra-low-power integrated time-mode temperature measurement systems CMOS Time-Mode Circuits and Systems: Fundamentals and Applications provides a valuable reference for circuit design engineers, hardware system engineers, graduate students, and others seeking to master this fast-evolving field.


Recent Trends in Engineering and Technology (NCRTET-2017)

Recent Trends in Engineering and Technology (NCRTET-2017)
Author: Bijoy Kumar Upadhyaya
Publisher: Allied Publishers
Total Pages: 300
Release: 2018-03-05
Genre: Technology & Engineering
ISBN: 9387380610

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After successful organization of the "National Seminar on Energy Science and Engineering, 2013 (NSESE-2013)" during November, 2013, Tripura Institute of Technology, Narsingarh, Tripura (West) has organized the second "National Conference on Recent Trends in Engineering and Technology, 2017 (NCRTET-2017)" during March 17-18, 2017. The seminar aimed to provide an opportunity for academicians and researchers in India to discuss the divergent issues related to recent trends in engineering and technology covering all aspects on one platform so as to critically examine the ongoing/current research and derive directions for future research strategies and policy implications. As a mark of remembrance, a souvenir was published on this occasion. The conference has received enormous response in the form of technical papers and research contributions from various authors across the country. In total, 55 numbers of technical papers related to different engineering domain were accepted for oral presentation. Four invited papers from renowned faculty members of our country were also presented on the occasion. We are also happy to keep our commitment of publishing a conference proceeding with ISBN through a prestigious publisher having all accepted full length papers.


CHIPS 2020 VOL. 2

CHIPS 2020 VOL. 2
Author: Bernd Höfflinger
Publisher: Springer
Total Pages: 342
Release: 2015-09-19
Genre: Science
ISBN: 3319220934

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The release of this second volume of CHIPS 2020 coincides with the 50th anniversary of Moore’s Law, a critical year marked by the end of the nanometer roadmap and by a significantly reduced annual rise in chip performance. At the same time, we are witnessing a data explosion in the Internet, which is consuming 40% more electrical power every year, leading to fears of a major blackout of the Internet by 2020. The messages of the first CHIPS 2020, published in 2012, concerned the realization of quantum steps for improving the energy efficiency of all chip functions. With this second volume, we review these messages and amplify upon the most promising directions: ultra-low-voltage electronics, nanoscale monolithic 3D integration, relevant-data, brain- and human-vision-inspired processing, and energy harvesting for chip autonomy. The team of authors, enlarged by more world leaders in low-power, monolithic 3D, video, and Silicon brains, presents new vistas in nanoelectronics, promising Moore-like exponential growth sustainable through to the 2030s.


Sigma-Delta Converters: Practical Design Guide

Sigma-Delta Converters: Practical Design Guide
Author: Jose M. de la Rosa
Publisher: John Wiley & Sons
Total Pages: 568
Release: 2018-08-22
Genre: Technology & Engineering
ISBN: 1119275768

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Thoroughly revised and expanded to help readers systematically increase their knowledge and insight about Sigma-Delta Modulators Sigma-Delta Modulators (SDMs) have become one of the best choices for the implementation of analog/digital interfaces of electronic systems integrated in CMOS technologies. Compared to other kinds of Analog-to-Digital Converters (ADCs), Σ∆Ms cover one of the widest conversion regions of the resolution-versus-bandwidth plane, being the most efficient solution to digitize signals in an increasingly number of applications, which span from high-resolution low-bandwidth digital audio, sensor interfaces, and instrumentation, to ultra-low power biomedical systems and medium-resolution broadband wireless communications. Following the spirit of its first edition, Sigma-Delta Converters: Practical Design Guide, 2nd Edition takes a comprehensive look at SDMs, their diverse types of architectures, circuit techniques, analysis synthesis methods, and CAD tools, as well as their practical design considerations. It compiles and updates the current research reported on the topic, and explains the multiple trade-offs involved in the whole design flow of Sigma-Delta Modulators—from specifications to chip implementation and characterization. The book follows a top-down approach in order to provide readers with the necessary understanding about recent advances, trends, and challenges in state-of-the-art Σ∆Ms. It makes more emphasis on two key points, which were not treated so deeply in the first edition: It includes a more detailed explanation of Σ∆Ms implemented using Continuous-Time (CT) circuits, going from system-level synthesis to practical circuit limitations. It provides more practical case studies and applications, as well as a deeper description of the synthesis methodologies and CAD tools employed in the design of Σ∆ converters. Sigma-Delta Converters: Practical Design Guide, 2nd Edition serves as an excellent textbook for undergraduate and graduate students in electrical engineering as well as design engineers working on SD data-converters, who are looking for a uniform and self-contained reference in this hot topic. With this goal in mind, and based on the feedback received from readers, the contents have been revised and structured to make this new edition a unique monograph written in a didactical, pedagogical, and intuitive style.


Multi-Mode / Multi-Band RF Transceivers for Wireless Communications

Multi-Mode / Multi-Band RF Transceivers for Wireless Communications
Author: Gernot Hueber
Publisher: John Wiley & Sons
Total Pages: 608
Release: 2011-04-04
Genre: Technology & Engineering
ISBN: 1118102207

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Summarizes cutting-edge physical layer technologies for multi-mode wireless RF transceivers. Includes original contributions from distinguished researchers and professionals. Covers cutting-edge physical layer technologies for multi-mode wireless RF transceivers. Contributors are all leading researchers and professionals in this field.


Digital Subsampling Phase Lock Techniques for Frequency Synthesis and Polar Transmission

Digital Subsampling Phase Lock Techniques for Frequency Synthesis and Polar Transmission
Author: Nereo Markulic
Publisher: Springer
Total Pages: 138
Release: 2019-01-30
Genre: Technology & Engineering
ISBN: 3030109585

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This book explains concepts behind fractional subsampling-based frequency synthesis that is re-shaping today’s art in the field of low-noise LO generation. It covers advanced material, giving clear guidance for development of background-calibrated environments capable of spur-free synthesis and wideband phase modulation. It further expands the concepts into the field of subsampling polar transmission, where the newly developed architecture enables unprecedented spectral efficiency levels, unquestionably required by the upcoming generation of wireless standards.