Download or read book A Clock Multiplier Based on an Injection Locked Ring Oscillator written by Nahla Tarek Youssef Abouelkheir and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Clock multipliers are among the most critical elements in high speed digital circuits. Power consumption, area, jitter and wide tuning range are key design metrics in these circuits. To provide a wide range of clock frequencies, Digitally Controlled Ring Oscillators (DCROs), whose frequencies are discretely tuned using a Frequency Code Word (FCW), have been investigated in recent studies. They have several advantages over LC-based Voltage Controlled Oscillators (VCO) including simplicity of design, small die area (i.e. no large inductors), better compatibility with deep submicron CMOS processes,ability to offer multiple output phases, and wider tuning range.A compact differential Injection Locked Clock Multiplier (ILCM) based on an injection locked DCRO is implemented in this thesis. As the transistor features continuously shrink and the supply voltage is reduced, ILCMs are becoming more prone to issues such as increased effect of random mismatch, increased device noise, susceptibility of the design to noise coupling and vulnerability to Process Voltage and Temperature (PVT) variations. Furthermore, ILCMs in recent System on a Chip (SoCs) have stringent design requirements including accurate frequency tuning, fine fractional resolution, high levels of integration and better amenability to technology scaling. In the proposed ILCM, multiple techniques were used to address deep submicron CMOS design challenges, as well as modern applications' requirements. The design is fully digital, synthesizable and automatically placed and routed. All circuit blocks were implemented using digital design flow and designed using a Hardware Description Language (HDL). This allows the design to be more easily ported to deep submicron processes. Online or offline PVT calibration can be performed using a replica oscillator and high speed digital counters to track frequency drifts with PVT variations. A DCRO based on a matrix structure has been utilized to reduce period variations due to random mismatch. The DCRO is built up from pseudo differential delay cells to enhance design immunity to noise coupling. The key thesis contributions are implementing a new DCRO structure using fully syntheziable differential structure, utilizing a novel PVT calibrator that can compensate for frequency mismatch between the main DCRO and its replica, and using a low complexity fractional ILCM technique that achieves a fine fractional resolution with few number of ring oscillator stages.Designed in a TSMC 65 nm GP CMOS process with no analog or RF enhancements, the proposed ILCM frequency ranges from 1.0 to 1.8 GHz and occupies 124:5 m 170 m of chip area. The ILCM can operate in integer or fractional mode for multiplication ratios up to 9. At 1.7 GHz and 1.1 V, the measured integrated RMS jitter (1 kHz to 30 MHz) for the 3rd and 9th multiplication factors are 197 fs and 381 fs, respectively. The ILCM consumes 13.25 mW of power and has a fraction resolution of fref=32. Furthermore, it achieves a jitter-power FOM of −241 dB, when measured at room temperature and 1.1 V. When tested in the presence of switching noise, it provides up to 7 dB improvement in phase noise when compared to a single ended version of the ILCM. In the presence of voltage variations (from 0.9 V to 1.1 V) and temperature variations (from 30 C to 70 C), the maximum integrated RMS jitter variation observed was 50 fs.
Download or read book Ring Oscillator Based Injection Locked Clock Multiplier written by Daniel R. Coombs and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Special Topics in Information Technology written by Angelo Geraci and published by Springer Nature. This book was released on 2021-02-26 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book presents thirteen outstanding doctoral dissertations in Information Technology from the Department of Electronics, Information and Bioengineering, Politecnico di Milano, Italy. Information Technology has always been highly interdisciplinary, as many aspects have to be considered in IT systems. The doctoral studies program in IT at Politecnico di Milano emphasizes this interdisciplinary nature, which is becoming more and more important in recent technological advances, in collaborative projects, and in the education of young researchers. Accordingly, the focus of advanced research is on pursuing a rigorous approach to specific research topics starting from a broad background in various areas of Information Technology, especially Computer Science and Engineering, Electronics, Systems and Control, and Telecommunications. Each year, more than 50 PhDs graduate from the program. This book gathers the outcomes of the thirteen best theses defended in 2019-20 and selected for the IT PhD Award. Each of the authors provides a chapter summarizing his/her findings, including an introduction, description of methods, main achievements and future work on the topic. Hence, the book provides a cutting-edge overview of the latest research trends in Information Technology at Politecnico di Milano, presented in an easy-to-read format that will also appeal to non-specialists.
Download or read book IC Design Insights from Selected Presentations at CICC 2017 written by Ali Sheikholeslami and published by CRC Press. This book was released on 2022-09-01 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains a selection of tutorial and invited presentations that were given at the IEEE CICC 2017 in Austin, Texas. The selection of the talks was made to provide a comprehensive coverage of key topics, including Circuits Techniques for mm-wave front-ends, RF and mm-wave receivers and frequency synthesis, data and DC-DC converters, and techniques for IoT security.The book is organized into five parts, namely:I: Millimeter-wave Transmitter CircuitsII: Millimeter-wave and RF Receiver Circuits III: Data ConvertersIV: DC-DC Converters and Voltage RegulatorsV: IoT Security Circuits and Techniques The book is part of an educational initiative of the IEEE Solid-State Circuits Society to offer its members state of the art educational material.
Download or read book Energy efficient Clock Generation for Communication and Computing Systems Using Injection Locking written by Chao Ma and published by . This book was released on 2012 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design of high-performance, high-speed clock generation and distribution becomes challenging in terms of phase noise, jitter and power consumption, due to the fast development of communication and computing systems. Injection locking is a promising clocking technique since it can significantly improve the energy efficiency, suppress the phase noise of the ring oscillator, enable a fast startup and conveniently generate multiple time-interleaved phases. A quasi-linear model of injection-locked ring oscillator (ILRO) is utilized to mathematically formulate the frequency and time domain characteristics of the system, as well as the phase noise shaping and jitter tracking behavior. The settling behavior of ILRO is also exploited and shows a strong dependence on the locking range and the initial phase difference of the injected and the resultant oscillation signals. A forwarded-clock synchronization based on injection locking is designed for a 10 Gb/s photonic interconnect according to the specific features of optical links. A single clock recovery can be used for all the four channels, resulting in a large amount of power and area saving. The applications of sub-harmonic and super-harmonic injection locking in wireless communications for frequency multiplying and division are also discussed.
Download or read book Fast Hopping Frequency Generation in Digital CMOS written by Mohammad Farazian and published by Springer Science & Business Media. This book was released on 2012-10-12 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: Overcoming the agility limitations of conventional frequency synthesizers in multi-band OFDM ultra wideband is a key research goal in digital technology. This volume outlines a frequency plan that can generate all the required frequencies from a single fixed frequency, able to implement center frequencies with no more than two levels of SSB mixing. It recognizes the need for future synthesizers to bypass on-chip inductors and operate at low voltages to enable the increased integration and efficiency of networked appliances. The author examines in depth the architecture of the dividers that generate the necessary frequencies from a single base frequency and are capable of establishing a fractional division ratio. Presenting the first CMOS inductorless single PLL 14-band frequency synthesizer for MB-OFDMUWB makes this volume a key addition to the literature, and with the synthesizer capable of arbitrary band-hopping in less than two nanoseconds, it operates well within the desired range on a 1.2-volt power supply. The author’s close analysis of the operation, stability, and phase noise of injection-locked regenerative frequency dividers will provide researchers and technicians with much food for developmental thought.
Download or read book Investigation of Injection locked Ring Oscillator written by Wen Wu and published by . This book was released on 2008 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Injection locked Ring Oscillator Frequency Dividers written by Rafael J. Betancourt-Zamora and published by . This book was released on 2005 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phase Locked Loops written by Woogeun Rhee and published by John Wiley & Sons. This book was released on 2023-12-19 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phase-Locked Loops Discover the essential materials for phase-locked loop circuit design, from fundamentals to practical design aspects A phase-locked loop (PLL) is a type of circuit with a range of important applications in telecommunications and computing. It generates an output signal with a controlled relationship to an input signal, such as an oscillator which matches the phases of input and output signals. This is a critical function in coherent communication systems, with the result that the theory and design of these circuits are essential to electronic communications of all kinds. Phase-Locked Loops: System Perspectives and Circuit Design Aspects provides a concise, accessible introduction to PLL design. It introduces readers to the role of PLLs in modern communication systems, the fundamental techniques of phase-lock circuitry, and the possible applications of PLLs in a wide variety of electronic communications contexts. The first book of its kind to incorporate modern architectures and to balance theoretical fundamentals with detailed design insights, this promises to be a must-own text for students and industry professionals. The book also features: Coverage of PLL basics with insightful analysis and examples tailored for circuit designers Applications of PLLs for both wireless and wireline systems Practical circuit design aspects for modern frequency generation, frequency modulation, and clock recovery systems Phase-Locked Loops is essential for graduate students and advanced undergraduates in integrated circuit design, as well researchers and engineers in electrical and computing subjects.
Download or read book Millimeter Wave Digitally Intensive Frequency Generation in CMOS written by Wanghua Wu and published by Academic Press. This book was released on 2015-09-23 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the digitally intensive time-domain architectures and techniques applied to millimeter-wave frequency synthesis, with the objective of improving performance and reducing the cost of implementation. Coverage includes system architecture, system level modeling, critical building block design, and digital calibration techniques, making it highly suitable for those who want to learn about mm-wave frequency generation for communication and radar applications, integrated circuit implementation, and time-domain circuit and system techniques. Highlights the challenges of frequency synthesis at mm-wave band using CMOS technology Compares the various approaches for mm-wave frequency generation (pros and cons) Introduces the digitally intensive synthesizer approach and its advantages Discusses the proper partitioning of the digitally intensive mm-wave frequency synthesizer into mm-wave, RF, analog, digital and software components Provides detailed design techniques from system level to circuit level Addresses system modeling, simulation techniques, design-for-test, and layout issues Demonstrates the use of time-domain techniques for high-performance mm-wave frequency synthesis
Download or read book Official Gazette of the United States Patent and Trademark Office written by United States. Patent and Trademark Office and published by . This book was released on 2001 with total page 1392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wireless Transceiver Circuits written by Woogeun Rhee and published by CRC Press. This book was released on 2018-09-03 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern transceiver systems require diversified design aspects as various radio and sensor applications have emerged. Choosing the right architecture and understanding interference and linearity issues are important for multi-standard cellular transceivers and software-defined radios. A millimeter-wave complementary metal–oxide–semiconductor (CMOS) transceiver design for multi-Gb/s data transmission is another challenging area. Energy-efficient short-range radios for body area networks and sensor networks have recently received great attention. To meet different design requirements, gaining good system perspectives is important. Wireless Transceiver Circuits: System Perspectives and Design Aspects offers an in-depth look at integrated circuit (IC) design for modern transceiver circuits and wireless systems. Ranging in scope from system perspectives to practical circuit design for emerging wireless applications, this cutting-edge book: Provides system design considerations in modern transceiver design Covers both systems and circuits for the millimeter-wave transceiver design Introduces four energy-efficient short-range radios for biomedical and wireless connectivity applications Emphasizes key building blocks in modern transceivers and transmitters, including frequency synthesizers and digital-intensive phase modulators Featuring contributions from renowned international experts in industry and academia, Wireless Transceiver Circuits: System Perspectives and Design Aspects makes an ideal reference for engineers and researchers in the area of wireless systems and circuits.
Download or read book Ultra Wideband Communications written by Mohammad Abdul Matin and published by BoD – Books on Demand. This book was released on 2011-07-27 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book has addressed few challenges to ensure the success of UWB technologies and covers several research areas including UWB low cost transceiver, low noise amplifier (LNA), ADC architectures, UWB filter, and high power UWB amplifiers. It is believed that this book serves as a comprehensive reference for graduate students in UWB technologies.
Download or read book High Frequency Multiphase Clock Generation Using Multipath Oscillators and Applications written by Amr Amin Abou-El-Sonoun and published by . This book was released on 2012 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oscillators and frequency dividers are core building blocks in communications systems and processors used to provide proper synchronization for the flow of information. Different variations of the conventional ring oscillator that involve coupling of different oscillator-stages or different oscillators have been introduced to provide multiple-phases without penalizing the oscillation frequency. These variations, known as multipath ring oscillators, enable system designers to relax the performance-power trade-off through parallelism. These oscillator structures, however, introduce additional degrees of freedom and expand the design space considerably which makes the process of designing them optimally a very difficult task. This dissertation introduces an accurate analytical model and comprehensive analysis for multipath ring oscillators and frequency dividers. The results of the analysis are incorporated into an optimization algorithm that allows a designer to arrive at the desired optimal design at a very short time. The analysis explains the factors that affect the different performance metrics including the number of phases, oscillation frequency, phase noise, and oscillation-mode stability. As an example application, a 48 Gb/s serializing transmitter is designed in 65nm CMOS technology using superharmonic injection-locked multipath ring oscillators to generate multiphase sampling clock signals for the various stages of the serializer. The ability to generate multiple clock phases at relatively high frequencies and low power cost allows significant power and area savings in the overall Transmitter.
Download or read book Digital Phase locked Loop with Background Supply Noise Calibration and Injection locked Clock Multiplier written by 田哲瑋 and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low noise Sub harmonic Injection Locked Multiloop Ring Oscillator Project Supported by the National Natural Science Foundation of China No 61264001 the Guangxi Natural Science Foundation Nos 2013GXNSFAA019333 2015GXNSFAA139301 2014GXNSFAA118386 the Graduate Education Innovation Program of GUET No GDYCSZ201457 the Project of Guangxi Education Department No LD14066B and the High Level Innovation Team and Outstanding Scholar Project of Guangxi Higher Education Institutes written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NANO CHIPS 2030 written by Boris Murmann and published by Springer Nature. This book was released on 2020-06-08 with total page 597 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, a global team of experts from academia, research institutes and industry presents their vision on how new nano-chip architectures will enable the performance and energy efficiency needed for AI-driven advancements in autonomous mobility, healthcare, and man-machine cooperation. Recent reviews of the status quo, as presented in CHIPS 2020 (Springer), have prompted the need for an urgent reassessment of opportunities in nanoelectronic information technology. As such, this book explores the foundations of a new era in nanoelectronics that will drive progress in intelligent chip systems for energy-efficient information technology, on-chip deep learning for data analytics, and quantum computing. Given its scope, this book provides a timely compendium that hopes to inspire and shape the future of nanoelectronics in the decades to come.
