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Author: Jabeom Koo Publisher: ISBN: Category : Languages : en Pages : 97
Book Description
Low power and low phase noise RF frequency references are essential for applications such as high performance ADCs, high speed serial data links, and low power radios. They constitute a multi-billion dollar market in today’s electronic industry. Quartz crystal is the most commonly used mineral for generating a reference clock. However, it needs a complicated manufacturing process, which increases cost, and it cannot be integrated with CMOS circuits. This is reason why wafer scale high-Q MEMS resonators are becoming attractive alternatives to quartz owing to their small size, low cost and integration potential. However, oscillators using MEMS resonator perform poorly compared to quartz based oscillators in terms of close-in phase noise. Close-in phase noise is an important performance metric for a reference oscillator as it dominates the in-band phase noise of a frequency synthesizer in a radio. In addition, highly miniaturized MEMS resonator based oscillators have exhibited poor frequency stability over temperature. This characteristic is an issue, which limits the choice of the oscillator type in wireless application such as Bluetooth, Wi-Fi and GPS. The first part of this thesis addresses the close-in phase noise issue and proposes circuits with MEMS resonator such as AlN contour mode resonator and FBAR (thin-Film Bulk-Acoustic Resonator) to demonstrate solutions for improving the phase noise and lowering the power consumption. The proposed oscillator with FBAR culminates in achieving more than 10dB lower phase noise than that of conventional oscillator with 350uW power consumption. The following part of this thesis addresses the frequency drift of the reference clock when the temperature changes. The wireless application requires stringent and challenging spec. for the oscillator to generate a stable clock signal. For example, GPS needs to have less than 2ppm frequency drift over temperature. The first prototype of fully integrated oven-controlled temperature compensation system is thus introduced. This effort aims to have a ±1.6ppm stability reference clock with 150uK temperature resolution.
Author: Jabeom Koo Publisher: ISBN: Category : Languages : en Pages : 97
Book Description
Low power and low phase noise RF frequency references are essential for applications such as high performance ADCs, high speed serial data links, and low power radios. They constitute a multi-billion dollar market in today’s electronic industry. Quartz crystal is the most commonly used mineral for generating a reference clock. However, it needs a complicated manufacturing process, which increases cost, and it cannot be integrated with CMOS circuits. This is reason why wafer scale high-Q MEMS resonators are becoming attractive alternatives to quartz owing to their small size, low cost and integration potential. However, oscillators using MEMS resonator perform poorly compared to quartz based oscillators in terms of close-in phase noise. Close-in phase noise is an important performance metric for a reference oscillator as it dominates the in-band phase noise of a frequency synthesizer in a radio. In addition, highly miniaturized MEMS resonator based oscillators have exhibited poor frequency stability over temperature. This characteristic is an issue, which limits the choice of the oscillator type in wireless application such as Bluetooth, Wi-Fi and GPS. The first part of this thesis addresses the close-in phase noise issue and proposes circuits with MEMS resonator such as AlN contour mode resonator and FBAR (thin-Film Bulk-Acoustic Resonator) to demonstrate solutions for improving the phase noise and lowering the power consumption. The proposed oscillator with FBAR culminates in achieving more than 10dB lower phase noise than that of conventional oscillator with 350uW power consumption. The following part of this thesis addresses the frequency drift of the reference clock when the temperature changes. The wireless application requires stringent and challenging spec. for the oscillator to generate a stable clock signal. For example, GPS needs to have less than 2ppm frequency drift over temperature. The first prototype of fully integrated oven-controlled temperature compensation system is thus introduced. This effort aims to have a ±1.6ppm stability reference clock with 150uK temperature resolution.
Author: Johan Huijsing Publisher: Springer Science & Business Media ISBN: 1475724624 Category : Technology & Engineering Languages : en Pages : 422
Book Description
Johan H. Huijsing This book contains 18 tutorial papers concentrated on 3 topics, each topic being covered by 6 papers. The topics are: Low-Noise, Low-Power, Low-Voltage Mixed-Mode Design with CAD Tools Voltage, Current, and Time References The papers of this book were written by top experts in the field, currently working at leading European and American universities and companies. These papers are the reviewed versions of the papers presented at the Workshop on Advances in Analog Circuit Design. which was held in Villach, Austria, 26-28 April 1995. The chairman of the Workshop was Dr. Franz Dielacher from Siemens, Austria. The program committee existed of Johan H. Huijsing from the Delft University of Technology, Prof.Willy Sansen from the Catholic University of Leuven, and Dr. Rudy 1. van der Plassche from Philips Eindhoven. This book is the fourth of aseries dedicated to the design of analog circuits. The topics which were covered earlier were: Operational Amplifiers Analog to Digital Converters Analog Computer Aided Design Mixed AlD Circuit Design Sensor Interface Circuits Communication Circuits Low-Power, Low-Voltage Integrated Filters Smart Power As the Workshop will be continued year by year, a valuable series of topics will be built up from all the important areas of analog circuit design. I hope that this book will help designers of analog circuits to improve their work and to speed it up.
Author: Ali Hajimiri Publisher: Springer Science & Business Media ISBN: 0306481995 Category : Technology & Engineering Languages : en Pages : 214
Book Description
It is hardly a revelation to note that wireless and mobile communications have grown tremendously during the last few years. This growth has placed stringent requi- ments on channel spacing and, by implication, on the phase noise of oscillators. C- pounding the challenge has been a recent drive toward implementations of transceivers in CMOS, whose inferior 1/f noise performance has usually been thought to disqualify it from use in all but the lowest-performance oscillators. Low noise oscillators are also highly desired in the digital world, of course. The c- tinued drive toward higher clock frequencies translates into a demand for ev- decreasing jitter. Clearly, there is a need for a deep understanding of the fundamental mechanisms g- erning the process by which device, substrate, and supply noise turn into jitter and phase noise. Existing models generally offer only qualitative insights, however, and it has not always been clear why they are not quantitatively correct.
Author: Feng Zhao Publisher: Springer ISBN: 3319122002 Category : Technology & Engineering Languages : en Pages : 106
Book Description
This book introduces low-noise and low-power design techniques for phase-locked loops and their building blocks. It summarizes the noise reduction techniques for fractional-N PLL design and introduces a novel capacitive-quadrature coupling technique for multi-phase signal generation. The capacitive-coupling technique has been validated through silicon implementation and can provide low phase-noise and accurate I-Q phase matching, with low power consumption from a super low supply voltage. Readers will be enabled to pick one of the most suitable QVCO circuit structures for their own designs, without additional effort to look for the optimal circuit structure and device parameters.
Author: Amr Fahim Publisher: Springer Science & Business Media ISBN: 1402080808 Category : Technology & Engineering Languages : en Pages : 257
Book Description
This book examines the issue of design of fully integrated frequency synthesizers suitable for system-on-a-chip (SOC) processors. This book takes a more global design perspective in jointly examining the design space at the circuit level as well as at the architectural level. The coverage of the book is comprehensive and includes summary chapters on circuit theory as well as feedback control theory relevant to the operation of phase locked loops (PLLs). On the circuit level, the discussion includes low-voltage analog design in deep submicron digital CMOS processes, effects of supply noise, substrate noise, as well device noise. On the architectural level, the discussion includes PLL analysis using continuous-time as well as discre- time models, linear and nonlinear effects of PLL performance, and detailed analysis of locking behavior. The material then develops into detailed circuit and architectural analysis of specific clock generation blocks. This includes circuits and architectures of PLLs with high power supply noise immunity and digital PLL architectures where the loop filter is digitized. Methods of generating low-spurious sampling clocks for discrete-time analog blocks are then examined. This includes sigma-delta fractional-N PLLs, Direct Digital Synthesis (DDS) techniques and non-conventional uses of PLLs. Design for test (DFT) issues as they arise in PLLs are then discussed. This includes methods of accurately measuring jitter and built-in-self-test (BIST) techniques for PLLs.
Author: Yuriy S. Shmaliy Publisher: Springer Nature ISBN: 9819927307 Category : Technology & Engineering Languages : en Pages : 1060
Book Description
This book collects selected aspects of recent advances and experiences, emerging technology trends that have positively impacted our world from operators, authorities, and associations from CCIE 2022, to help address the world’s advanced computing, control technology, information technology, artificial intelligence, machine learning, deep learning, and neural networks. Meanwhile, the topics included in the proceedings have high research value and present current insights, developments, and trends in computing, control, and industrial engineering.
Author: Pieter Harpe Publisher: Springer Nature ISBN: 3031289129 Category : Technology & Engineering Languages : en Pages : 345
Book Description
This book is based on the 18 tutorials presented during the 30th 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, with specific contributions focusing on analog circuits for machine learning, current/voltage/temperature sensors, and high-speed communication via wireless, wireline, or optical links. This book serves as a valuable reference to the state-of-the-art, for anyone involved in analog circuit research and development.
Author: Valentijn De Smedt Publisher: Springer ISBN: 3319090038 Category : Technology & Engineering Languages : en Pages : 422
Book Description
This book investigates the possible circuit solutions to overcome the temperature and supply voltage-sensitivity of fully-integrated time references for ultra-low-power communication in wireless sensor networks. The authors provide an elaborate theoretical introduction and literature study to enable full understanding of the design challenges and shortcomings of current oscillator implementations. Furthermore, a closer look to the short-term as well as the long-term frequency stability of integrated oscillators is taken. Next, a design strategy is developed and applied to 5 different oscillator topologies and 1 sensor interface. All 6 implementations are subject to an elaborate study of frequency stability, phase noise and power consumption. In the final chapter all blocks are compared to the state of the art.
Author: Brian Otis Publisher: Springer Science & Business Media ISBN: 0387493131 Category : Technology & Engineering Languages : en Pages : 192
Book Description
This book is written for academic and professional researchers designing communication systems for pervasive and low power applications. There is an introduction to wireless sensor networks, but the main emphasis of the book is on design techniques for low power, highly integrated transceivers. Instead of presenting a single design perspective, this book presents the design philosophies from three diverse research groups, providing three completely different strategies for achieving similar goals. By presenting diverse perspectives, this book prepares the reader for the countless design decisions they will be making in their own designs.
Author: Jabeom Koo
Author: Jabeom Koo
Author: Johan Huijsing
Author: Ali Hajimiri
Author: Feng Zhao
Author: Amr Fahim
Author: Yuriy S. Shmaliy
Author: Pieter Harpe
Author: Valentijn De Smedt
Author: Manu Seth
Author: Brian Otis