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Noise Shaping Asynchronous Sar Adc Based Time To Digital Converter
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Book Synopsis Noise Shaping Asynchronous SAR ADC Based Time to Digital Converter by : Sowmya Katragadda
Download or read book Noise Shaping Asynchronous SAR ADC Based Time to Digital Converter written by Sowmya Katragadda and published by . This book was released on 2016 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Time-to-digital converters (TDCs) are key elements for the digitization of timing information in modern mixed-signal circuits such as digital PLLs, DLLs, ADCs, and on-chip jitter-monitoring circuits. Especially, high-resolution TDCs are increasingly employed in on-chip timing tests, such as jitter and clock skew measurements, as advanced fabrication technologies allow fine on-chip time resolutions. Its main purpose is to quantize the time interval of a pulse signal or the time interval between the rising edges of two clock signals. Similarly to ADCs, the performance of TDCs are also primarily characterized by Resolution, Sampling Rate, FOM, SNDR, Dynamic Range and DNL/INL. This work proposes and demonstrates 2nd order noise shaping Asynchronous SAR ADC based TDC architecture with highest resolution of 0.25 ps among current state of art designs with respect to post-layout simulation results. This circuit is a combination of low power/High Resolution 2nd Order Noise Shaped Asynchronous SAR ADC backend with simple Time to Amplitude converter (TAC) front-end and is implemented in 40nm CMOS technology. Additionally, special emphasis is given on the discussion on various current state of art TDC architectures.
Book Synopsis Noise Shaping Techniques for Analog and Time to Digital Converters Using Voltage Controlled Oscillators by : Matthew Allen Zornig Straayer
Download or read book Noise Shaping Techniques for Analog and Time to Digital Converters Using Voltage Controlled Oscillators written by Matthew Allen Zornig Straayer and published by . This book was released on 2008 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) The use of VCO-based quantization within continuous-time (CT) [Epsilon] [Delta] ADC structures is also explored, with a custom prototype in 0.13pm CMOS showing measured performance of 86/72dB SNR/SNDR with 10MHz bandwidth while consuming 40mW from a 1.2V supply and occupying an active area of 640pm X 660pm. A key element of the ADC structure is a 5-bit VCO-based quantizer clocked at 950 MHz which we show achieves first-order noise-shaping of its quantization noise. The quantizer structure allows the second order CT Epsilon] [Delta] ADC topology to achieve third order noise shaping, and direct connection of the VCO-based quantizer to the internal DACs of the ADC provides intrinsic dynamic element matching (DEM) of the DAC elements.
Book Synopsis Noise-Shaping All-Digital Phase-Locked Loops by : Francesco Brandonisio
Download or read book Noise-Shaping All-Digital Phase-Locked Loops written by Francesco Brandonisio and published by Springer Science & Business Media. This book was released on 2013-12-17 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a novel approach to the analysis and design of all-digital phase-locked loops (ADPLLs), technology widely used in wireless communication devices. The authors provide an overview of ADPLL architectures, time-to-digital converters (TDCs) and noise shaping. Realistic examples illustrate how to analyze and simulate phase noise in the presence of sigma-delta modulation and time-to-digital conversion. Readers will gain a deep understanding of ADPLLs and the central role played by noise-shaping. A range of ADPLL and TDC architectures are presented in unified manner. Analytical and simulation tools are discussed in detail. Matlab code is included that can be reused to design, simulate and analyze the ADPLL architectures that are presented in the book.
Book Synopsis A 13-ENOB Low-OSR Fifth-Order Noise Shaping SAR ADC with PVT-insensitive Voltage-Time-Voltage Converter by :
Download or read book A 13-ENOB Low-OSR Fifth-Order Noise Shaping SAR ADC with PVT-insensitive Voltage-Time-Voltage Converter written by and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nonuniform Sampling by : Farokh Marvasti
Download or read book Nonuniform Sampling written by Farokh Marvasti and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 938 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our understanding of nature is often through nonuniform observations in space or time. In space, one normally observes the important features of an object, such as edges. The less important features are interpolated. History is a collection of important events that are nonuniformly spaced in time. Historians infer between events (interpolation) and politicians and stock market analysts forecast the future from past and present events (extrapolation). The 20 chapters of Nonuniform Sampling: Theory and Practice contain contributions by leading researchers in nonuniform and Shannon sampling, zero crossing, and interpolation theory. Its practical applications include NMR, seismology, speech and image coding, modulation and coding, optimal content, array processing, and digital filter design. It has a tutorial outlook for practising engineers and advanced students in science, engineering, and mathematics. It is also a useful reference for scientists and engineers working in the areas of medical imaging, geophysics, astronomy, biomedical engineering, computer graphics, digital filter design, speech and video processing, and phased array radar.
Book Synopsis Delta-Sigma A/D-Converters by : Richard Gaggl
Download or read book Delta-Sigma A/D-Converters written by Richard Gaggl and published by Springer Science & Business Media. This book was released on 2012-12-17 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: The emphasis of this book is on practical design aspects for broadband A/D converters for communication systems. The embedded designs are employed for transceivers in the field of ADSL solutions and WLAN applications. An area- and power-efficient realization of a converter is mandatory to remain competitive in the market. The right choice for the converter topology and architecture needs to be done very carefully to result in a competitive FOM. The book begins with a brief overview of basic concepts about ADSL and WLAN to understand the ADC requirements. At architectural level, issues on different modulator topologies are discussed employing the provided technology node. The design issues are pointed out in detail for modern digital CMOS technologies, beginning with 180nm followed by 130nm and going down to 65nm feature size. Beside practical aspects, challenges to mixed-signal design level are addressed to optimize the converters in terms of consumed chip area, power consumption and design for high yield in volume production. Thus, careful considerations on circuit- and architectural- level are performed by introducing a dynamic-biasing technique, a feed-forward approach and a resolution in time instead of amplitude resolution.
Book Synopsis Power-Efficient High-Speed Parallel-Sampling ADCs for Broadband Multi-carrier Systems by : Yu Lin
Download or read book Power-Efficient High-Speed Parallel-Sampling ADCs for Broadband Multi-carrier Systems written by Yu Lin and published by Springer. This book was released on 2015-05-07 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses the challenges of designing high performance analog-to-digital converters (ADCs) based on the “smart data converters” concept, which implies context awareness, on-chip intelligence and adaptation. Readers will learn to exploit various information either a-priori or a-posteriori (obtained from devices, signals, applications or the ambient situations, etc.) for circuit and architecture optimization during the design phase or adaptation during operation, to enhance data converters performance, flexibility, robustness and power-efficiency. The authors focus on exploiting the a-priori knowledge of the system/application to develop enhancement techniques for ADCs, with particular emphasis on improving the power efficiency of high-speed and high-resolution ADCs for broadband multi-carrier systems.
Book Synopsis Analog-to-Digital Conversion by : Marcel J.M. Pelgrom
Download or read book Analog-to-Digital Conversion written by Marcel J.M. Pelgrom and published by Springer Nature. This book was released on 2022-03-15 with total page 1033 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook is appropriate for use in graduate-level curricula in analog-to-digital conversion, as well as for practicing engineers in need of a state-of-the-art reference on data converters. It discusses various analog-to-digital conversion principles, including sampling, quantization, reference generation, Nyquist architectures and sigma-delta modulation. This book presents an overview of the state-of-the-art in this field and focuses on issues of optimizing accuracy and speed, while reducing the power level. This new, fourth edition emphasizes novel calibration concepts, the specific requirements of systems, the consequences of advanced technology and the need for a more statistical approach to accuracy. Pedagogical enhancements to this edition include additional, new exercises, solved examples to introduce all key, new concepts and warnings, remarks and hints, from a practitioner's perspective, wherever appropriate. Considerable background information and practical tips, from designing a PCB, to lay-out aspects, to trade-offs on system level, complement the discussion of basic principles, making this book a valuable reference for the experienced engineer.
Book Synopsis Next-Generation ADCs, High-Performance Power Management, and Technology Considerations for Advanced Integrated Circuits by : Andrea Baschirotto
Download or read book Next-Generation ADCs, High-Performance Power Management, and Technology Considerations for Advanced Integrated Circuits written by Andrea Baschirotto and published by Springer Nature. This book was released on 2019-10-24 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is based on the 18 tutorials presented during the 28th workshop on Advances in Analog Circuit Design. Expert designers present readers with information about a variety of topics at the frontier of analog circuit design, including next-generation analog-to-digital converters , high-performance power management systems and technology considerations for advanced IC design. For anyone involved in analog circuit research and development, this book will be a valuable summary of the state-of-the-art in these areas. Provides a summary of the state-of-the-art in analog circuit design, written by experts from industry and academia; Presents material in a tutorial-based format; Includes coverage of next-generation analog-to-digital converters, high-performance power management systems, and technology considerations for advanced IC design.
Author :Vishnu Unnikrishnan Publisher :Linköping University Electronic Press ISBN 13 :9176856240 Total Pages :52 pages Book Rating :4.1/5 (768 download)
Book Synopsis Design of VCO-based ADCs by : Vishnu Unnikrishnan
Download or read book Design of VCO-based ADCs written by Vishnu Unnikrishnan and published by Linköping University Electronic Press. This book was released on 2017-03-28 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today's complex electronic systems with billions of transistors on a single die are enabled by the aggressive scaling down of the device feature size at an exponential rate as predicted by the Moore's law. Digital circuits benefit from technology scaling to become faster, more energy efficient as well as more area efficient as the feature size is scaled down. Moreover, digital design also benefits from mature CAD tools that simplify the design and cross-technology porting of complex systems, leveraging on a cell-based design methodology. On the other hand, the design of analog circuits is getting increasingly difficult as the feature size scales down into the deep nanometer regime due to a variety of reasons like shrinking voltage headroom, reducing intrinsic gain of the devices, increasing noise coupling between circuit nodes due to shorter distances etc. Furthermore, analog circuits are still largely designed with a full custom design ow that makes their design and porting tedious, slow, and expensive. In this context, it is attractive to consider realizing analog/mixed-signal circuits using standard digital components. This leads to scaling-friendly mixed-signal blocks that can be designed and ported using the existing CAD framework available for digital design. The concept is already being applied to mixed-signal components like frequency synthesizers where all-digital architectures are synthesized using standard cells as basic components. This can be extended to other mixed-signal blocks like digital-to-analog and analog to- digital converters as well, where the latter is of particular interest in this thesis. A voltage-controlled oscillator (VCO)-based analog-to-digital converter (ADC) is an attractive architecture to achieve all-digital analog-to digital conversion due to favorable properties like shaping of the quantization error, inherent anti-alias filtering etc. Here a VCO operates as a signal integrator as well as a quantizer. A converter employing a ring oscillator as the VCO lends itself to an all-digital implementation. In this dissertation, we explore the design of VCO-based ADCs synthesized using digital standard cells with the long-term goal of achieving high performance data converters built from low accuracy switch components. In a first step, an ADC is designed using vendor supplied standard cells and fabricated in a 65 nm CMOS process. The converter delivers an 8-bit ENOB over a 25 MHz bandwidth while consuming 3.3 mW of power resulting in an energy efficiency of 235 fJ/step (Walden FoM). Then we utilize standard digital CAD tools to synthesize converter designs that are fully described using a hardware description language. A polynomial-based digital post-processing scheme is proposed to correct for the VCO nonlinearity. In addition, pulse modulation schemes like delta modulation and asynchronous sigma-delta modulation are used as a signal pre-coding scheme, in an attempt to reduce the impact of VCO nonlinearity on converter performance. In order to investigate the scaling benefits of all-digital data conversion, a VCO-based converter is designed in a 28 nm CMOS process. The design delivers a 13.4-bit ENOB over a 5 MHz bandwidth achieving an energy efficiency of 4.3 fJ/step according to post-synthesis schematic simulation, indicating that such converters have the potential of achieving good performance in deeply scaled processes by exploiting scaling benefits. Furthermore, large conversion errors caused by non-ideal sampling of the oscillator phase are studied. An encoding scheme employing ones counters is proposed to code the sampled ring oscillator output into a number, which is resilient to a class of sampling induced errors modeled by temporal reordering of the transitions in the ring. The proposed encoding reduces the largest error caused by random reordering of up to six subsequent bits in the sampled signal from 31 to 2 LSBs. Finally, the impact of process, voltage, and temperature (PVT) variations on the performance while operating the converter from a subthreshold supply is investigated. PVT-adaptive solutions are suggested as a means to achieve energy-efficient operation over a wide range of PVT conditions.
Book Synopsis Advanced Data Converters by : Gabriele Manganaro
Download or read book Advanced Data Converters written by Gabriele Manganaro and published by Cambridge University Press. This book was released on 2011-11-17 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: Need to get up to speed quickly on the latest advances in high performance data converters? Want help choosing the best architecture for your application? With everything you need to know about the key new converter architectures, this guide is for you. It presents basic principles, circuit and system design techniques and associated trade-offs, doing away with lengthy mathematical proofs and providing intuitive descriptions upfront. Everything from time-to-digital converters to comparator-based/zero-crossing ADCs is covered and each topic is introduced with a short summary of the essential basics. Practical examples describing actual chips, along with extensive comparison between architectural or circuit options, ease architecture selection and help you cut design time and engineering risk. Trade-offs, advantages and disadvantages of each option are put into perspective with a discussion of future trends, showing where this field is heading, what is driving it and what the most important unanswered questions are.
Book Synopsis Understanding Delta-Sigma Data Converters by : Shanthi Pavan
Download or read book Understanding Delta-Sigma Data Converters written by Shanthi Pavan and published by John Wiley & Sons. This book was released on 2017-01-24 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition introduces operation and design techniques for Sigma-Delta converters in physical and conceptual terms, and includes chapters which explore developments in the field over the last decade Includes information on MASH architectures, digital-to-analog converter (DAC) mismatch and mismatch shaping Investigates new topics including continuous-time ΔΣ analog-to-digital converters (ADCs) principles and designs, circuit design for both continuous-time and discrete-time ΔΣ ADCs, decimation and interpolation filters, and incremental ADCs Provides emphasis on practical design issues for industry professionals
Book Synopsis Charge-Sharing SAR ADCs for Low-Voltage Low-Power Applications by : Taimur Rabuske
Download or read book Charge-Sharing SAR ADCs for Low-Voltage Low-Power Applications written by Taimur Rabuske and published by Springer. This book was released on 2016-08-02 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces readers to the potential of charge-sharing (CS) successive approximation register (SAR) analog-to-digital converters (ADCs), while providing extensive analysis of the factors that limit the performance of the CS topology. The authors present guidelines and useful techniques for mitigating the limitations of the architecture, while focusing on the implementation under restricted power budgets and voltage supplies.
Book Synopsis Design Techniques for Time Based Data Converters by : Manideep Gande
Download or read book Design Techniques for Time Based Data Converters written by Manideep Gande and published by . This book was released on 2013 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern day CMOS processes are characterized by voltage scaling and geometry scaling. Geometry scaling helps reduce gate delays, thereby aiding in the design of data converters which use time based processing. Another artifact of geometry scaling is the increase in complexity of digital circuitry available on traditional analog ICs, as digital signal processing could be used to compensate for analog inaccuracies. Calibration assisted analog-to-digital converters(ADCs), software defined radio, digital phase locked loops, etc ... have all gained from improvements in the digital processing available on chip. This thesis focusses on data converters which utilize the above features of modern day CMOS processes. The thesis is primarily divided into two parts. The first part focuses on a technique to convert the time information into a digital word. A high resolution time-to-digital converter (TDC) architecture is proposed which combines the principles of noise-shaping integrating quantizer and charge-pump to build a third-order delta-sigma TDC using a dedicated feedback DAC. Fabricated in a 0.13[micro]m CMOS process, the prototype TDC achieves better than 71dB DR for a 2.8MHz signal bandwidth. The second part of the thesis proposes a blind digital calibration technique to remove non-linearity in any traditional ADC architectures. The proposed technique uses the concept of downsampling and orthogonality of sinusoidal waves to estimate the harmonic distortion in ADCs and can be used to calibrate multiple harmonics simultaneously. As a proof of concept, the algorithm is demonstrated on a first-order ring oscillator based delta-sigma ADC, whose performance is harmonic distortion limited. Built in 0.13[micro]m CMOS process, the algorithm improves the SNDR of the ADC by 39dB while improving SFDR by 45 dB.
Book Synopsis Data Conversion Handbook by : Walt Kester
Download or read book Data Conversion Handbook written by Walt Kester and published by Newnes. This book was released on 2005 with total page 977 pages. Available in PDF, EPUB and Kindle. Book excerpt: This complete update of a classic handbook originally created by Analog Devices and never previously published offers the most complete and up-to-date reference available on data conversion, from the world authority on the subject. It describes in depth the theory behind and the practical design of data conversion circuits. It describes the different architectures used in A/D and D/A converters - including many advances that have been made in this technology in recent years - and provides guidelines on which types are best suited for particular applications. It covers error characterization and testing specifications, essential design information that is difficult to find elsewhere. The book also contains a wealth of practical application circuits for interfacing and supporting A/D and D/A converters within an electronic system. In short, everything an electronics engineer needs to know about data converters can be found in this volume, making it an indispensable reference with broad appeal. The accompanying CD-ROM provides software tools for testing and analyzing data converters as well as a searchable pdf version of the text. * brings together a huge amount of information impossible to locate elsewhere. * many recent advances in converter technology simply aren't covered in any other book. * a must-have design reference for any electronics design engineer or technician
Book Synopsis A Study of SAR ADC and Implementation of 10-bit Asynchronous Design by : Olga Kardonik
Download or read book A Study of SAR ADC and Implementation of 10-bit Asynchronous Design written by Olga Kardonik and published by . This book was released on 2013 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Successive Approximation Register (SAR) Analog-to-Digital Converters (ADCs) achieve low power consumption due to its simple architecture based on dominant digital content. SAR ADCs do not require an op-amp, so they are advantageous in CMOS technology scaling. The architecture is often the best choice for battery-powered or mobile applications which need medium resolution (8-12 bits), medium speed (10 - 100 MS/s) and require low-power consumption and small form factor. This work studies the architecture in depth, highlighting its main constraints and tradeoffs involving into SAR ADC design. The work researches asynchronous operation of SAR logic and investigates the latest trends for ADC's analog components - comparator and DAC. 10-bit asynchronous SAR ADC is implemented in CMOS 0.18 μm. Design's noise and power are presented as a breakdown among components.
Book Synopsis Analog-to-Digital Conversion by : Marcel Pelgrom
Download or read book Analog-to-Digital Conversion written by Marcel Pelgrom and published by Springer. This book was released on 2016-09-29 with total page 565 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook is appropriate for use in graduate-level curricula in analog-to-digital conversion, as well as for practicing engineers in need of a state-of-the-art reference on data converters. It discusses various analog-to-digital conversion principles, including sampling, quantization, reference generation, nyquist architectures and sigma-delta modulation. This book presents an overview of the state of the art in this field and focuses on issues of optimizing accuracy and speed, while reducing the power level. This new, third edition emphasizes novel calibration concepts, the specific requirements of new systems, the consequences of 22-nm technology and the need for a more statistical approach to accuracy. Pedagogical enhancements to this edition include additional, new exercises, solved examples to introduce all key, new concepts and warnings, remarks and hints, from a practitioner's perspective, wherever appropriate. Considerable background information and practical tips, from designing a PCB, to lay-out aspects, to trade-offs on system level, complement the discussion of basic principles, making this book a valuable reference for the experienced engineer.
