Download or read book Low noise Local Oscillator Design Techniques Using a DLL based Frequency Multiplier for Wireless Applications written by George Chien and published by . This book was released on 2000 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Low level Local Oscillator Design Techniques Using a DLL based Frequency Mulitplier for Wireless Applications written by George Chien and published by . This book was released on 2000 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Frequency Low Power Local Oscillator Generation written by Yannan Miao and published by LAP Lambert Academic Publishing. This book was released on 2012 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: With rapid development in the area of RF and wireless communication, the interest in frequency synthesizers has grown rapidly in the last few years. Frequency synthesizer is used for local oscillator (LO) generation. In this thesis, our aim is to explore high-frequency low-power LO generation in CMOS technology. We focus on three most power-hungry blocks in a frequency synthesizer, which dominate the total power consumption due to their high-frequency operation, namely voltage-controlled oscillator (VCO), frequency divider and frequency multiplier, as these circuits are the bottleneck to achieve the above mentioned aim. Through reducing their power consumption, the total power consumption of the frequency synthesizer can be reduced significantly. Moreover, the phase noise of the frequency synthesizer is significantly dependent on the VCO and the frequency multiplier. These novel ideas are implemented in a 24-GHz frequency synthesizer. These designs should help those IC designers, who may be considering improving the performance of transceiver.

Download or read book Intelligent Computing Paradigm and Cutting edge Technologies written by Margarita N. Favorskaya and published by Springer Nature. This book was released on 2021-04-21 with total page 463 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book aims to bring together Researchers, Scientists, Engineers, Scholars and Students in the areas of computer engineering and information technology, and provides a forum for the dissemination of original research results, new ideas, Research and development, practical experiments, which concentrate on both theory and practices, for the benefit of the society. The book also provides a premier interdisciplinary platform for researchers, practitioners and educators to present and discuss the most recent innovations, trends, and concerns as well as practical challenges encountered and solutions adopted in the fields of Computer Science and Information Technology in the context of Distributed computing, Big data, High performance computing, Internet-of-Things, and digital pedagogy. It is becoming increasingly important to develop adaptive, intelligent computing-centric, energy-aware, secure and privacy-aware mechanisms in high performance computing and IoT applications. This book aspires to convey researchers’ experiences, to present excellent result analysis, future scopes, and challenges facing the field of computer science, information technology, telecommunication, and digital pedagogy. This book aims to attract researchers and practitioners who are working in Information Technology and Computer Science. This book is about basics and high level concepts regarding intelligent computing paradigm, communications, and digital learning process. The book serves as a useful guide for Undergraduates, Postgraduates and Research Scholar in the field of Computer Science, Information Technology, and Electronics Engineering. We believe that this volume not only presents novel and interesting ideas but also will stimulate interesting discussions from the participants and inspire new ideas.

Download or read book The Design of Low Noise Oscillators written by Ali Hajimiri and published by Springer Science & Business Media. This book was released on 1999-02-28 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Quadrature Frequency Generation for Wideband Wireless Applications written by Mohammad Elbadry and published by Springer. This book was released on 2016-10-09 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes design techniques for wideband quadrature LO generation for software defined radio transceivers, with frequencies spanning 4GHz to around 80GHz. The authors discuss several techniques that can be used to reduce the cost and/or power consumption of one of the key component of the RF front-end, the quadrature local oscillator. The discussion includes simple and useful insights into quadrature VCOs, along with numerous examples of practical techniques.

Download or read book A 3 8 6 4GHz Local Oscillator System Using an Injection Locked Frequency Doubling and Phase Tuning Technique written by James P. Maligeorgos and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis studies the design of a novel local oscillator system based on low-voltage and low-power regenerative (injection locking) techniques. The LO system converts an input signal of frequeney 'fLO'/2 into a quadrature pair of LO signals at a frequency of 'fLO', intended to drive a pair of I and Q down-converting mixers. A new IC compatible technique for regenerative frequency doubling is presented. Regenerative frequency doublers are cascaded on-chip to provide a net multiply-by-4 function, generating frequencies in excess of fT2 without the need for interstage filtering. A new technique is also presented for frequency-independent phase control of the quadrature LO signals of a regenerative divider (I-Q generator), achieving a precision on the order of 0.01°. Results are presented in the context of a fabricated 5-6GHz image reject receiver.

Download or read book Memorandum written by and published by . This book was released on 2000 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analysis and Design of Low Voltage LC Oscillators and Their Application to Wireless Sensor Networks written by Ankur Guha Roy and published by . This book was released on 2015 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation focuses on the analysis, design, and application of inductor-capacitor (LC) oscillators for wireless sensor networks (WSNs). First an analysis and design optimization approach for enhanced swing, low power CMOS LC oscillators is presented. A phasor based analysis is used for determining the amplitude and phase noise of these oscillators with MOSFET operation in cut-off, linear and saturation regions. The calculated steady state output amplitude and phase noise from this analysis are in agreement with Cadence Spectre simulations for different bias conditions. An application of this analysis to the design optimization of LC oscillators is also demonstrated. This is followed by a power generation method based fast start-up analysis of resonator based oscillators. A small signal two-port based approach that is design oriented is presented. The analysis has been validated with detailed circuit level simulations. Several MOSFET oscillator architectures have been analyzed and the start-up times compared using this analysis with applications to start-up time reduction of LC oscillators. A novel low voltage quadrature LC oscillator with a fast start-up is then presented. Simulations show that the proposed oscillator can obtain a phase noise of -150 dBc/Hz at 10 MHz offset for a 5 GHz center frequency and an FoM of 195 dBc/Hz. The proposed oscillator has a superior start-up performance compared to other low voltage quadrature LC oscillator architectures. The design aspect of LC oscillators focuses on a new enhanced swing class-D VCO which operates from a supply voltage as low as 300 mV. The architectural advantages are described along with an analysis for the oscillation frequency. Prototype differential and quadrature variants of the proposed VCO have been implemented in a 65 nm RF CMOS process with a 5 GHz oscillation frequency. At a 350 mV supply, the measured phase noise performance for the quadrature VCO with a 5% tuning range is -137.1 dBc/Hz at 3 MHz offset with a power dissipation of 2.1 mW from a 0.35 V supply. The highest resulting figure-of-merit (FoM) is 198.3 dBc/Hz. Finally, an application of LC oscillators for a crystal free radio-frequency (RF) receiver design has been explored. It is shown that a source-synchronous receiver with MSK modulation is a suitable choice for eliminating the crystal in WSN applications. Design trade-offs have been analyzed using system level simulations.

Download or read book IEEE International Symposium on Industrial Electronics Proceedings written by and published by . This book was released on 2004 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Broadband Low Noise Frequency Synthesizers for Future Wireless Communication Systems written by Golsa Ghiaasi-Hafezi and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: In this thesis the design of low phase noise frequency synthesizers for emerging wireless applications is investigated. The future wireless applications employ Orthogonal Frequency Division Multiplexing (OFDM) in order to combat the harsh mobile environment effects on the signal, such as Doppler effect or Multi-path fading. However, OFDM imposes the stringent integrated phase noise requirement to maintain the orthogonality of the subcarriers. The emerging applications also require broadband functionality to cover the multiple bands specified by different application using a single frequency synthesizer. Particularly, this thesis focuses on the design of SD fractional-N frequency synthesizers for OFDM based applications. SD fractional-N PLLs have proven to be a very good candidate for the emerging OFDM-based radios which require employment of fast switching low phase noise frequency synthesizers. The issue of spectral Purity in SD PLLs is discussed, and the issue of phase noise and fractional spurs is investigated. Considering the loop dynamics, the optimal design for low phase noise is described. The problem of noise folding and its impact on spur cancellation is studied. A type-I second order PLL is designed which inherently eliminates the sources of nonlinearity in the signal path. The LO generation scheme is proposed to cover the three bands of WiMAX application centered at 2.5, 3.5 and 5.5 GHz by utilizing a broadband PLL. The design employs a uniformly sampled two state PFD and a discrete on-chip filter. A cancellation DAC in embedded in the PFD which is used to cancel out the phase induced by quantization error. The design enhances the noise folding and spur performance and satisfies the stringent integrated phase noise requirement of the application. As a critical part of the top-down design, a system study for a dual-band DVB-H tuner is presented. The tuner's various requirements in terms of linearity, gain and noise are derived. The required of phase noise of the PLL is calculated on the basis of the blocker profile of the tuner. The direct conversion architecture is adopted for the design and the specification of various blocks in the radio is derived in order to satisfy the required performance. The LO generation scheme for dual band local oscillator is proposed. Finally, the design of key circuits in the PLL loop is presented. The wideband VCO for triple WiMAX application is utilizing an amplitude regulation scheme to minimize supply pushing and improve the spectral purity. The high-speed multi-modulus divider design is presented. The design of high-speed broadband divide-by-32/33 dual modulus prescaler is described.

Download or read book Design of CMOS Phase Locked Loops written by Behzad Razavi and published by Cambridge University Press. This book was released on 2020-01-30 with total page 509 pages. Available in PDF, EPUB and Kindle. Book excerpt: This modern, pedagogic textbook from leading author Behzad Razavi provides a comprehensive and rigorous introduction to CMOS PLL design, featuring intuitive presentation of theoretical concepts, extensive circuit simulations, over 200 worked examples, and 250 end-of-chapter problems. The perfect text for senior undergraduate and graduate students.

Download or read book Ultra Low Power FM UWB Transceivers for IoT written by Vladimir Kopta and published by CRC Press. This book was released on 2022-09-01 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past two decades we have witnessed the increasing popularity of the internet of things. The vision of billions of connected objects, able to interact with their environment, is the key driver directing the development of future communication devices. Today, power consumption as well as the cost and size of radios remain some of the key obstacles towards fulfilling this vision. Ultra-Low Power FM-UWB Transceivers for IoT presents the latest developments in the field of low power wireless communication. It promotes the FM-UWB modulation scheme as a candidate for short range communication in different IoT scenarios. The FM-UWB has the potential to provide exactly what is missing today. This spread spectrum technique enables significant reduction in transceiver complexity, making it smaller, cheaper and more energy efficient than most alternative options. The book provides an overview of both circuit-level and architectural techniques used in low power radio design, with a comprehensive study of state-of-the-art examples. It summarizes key theoretical aspects of FM-UWB with a glimpse at potential future research directions. Finally, it gives an insight into a full FM-UWB transceiver design, from system level specifications down to transistor level design, demonstrating the modern power reduction circuit techniques. Ultra-Low Power FM-UWB Transceivers for IoT is a perfect text and reference for engineers working in RF IC design and wireless communication, as well as academic staff and graduate students engaged in low power communication systems research.

Download or read book Pll Performance Simulation and Design written by Dean Banerjee and published by Dog Ear Publishing. This book was released on 2006-08 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is intended for the reader who wishes to gain a solid understanding of Phase Locked Loop architectures and their applications. It provides a unique balance between both theoretical perspectives and practical design trade-offs. Engineers faced with real world design problems will find this book to be a valuable reference providing example implementations, the underlying equations that describe synthesizer behavior, and measured results that will improve confidence that the equations are a reliable predictor of system behavior. New material in the Fourth Edition includes partially integrated loop filter implementations, voltage controlled oscillators, and modulation using the PLL.

Download or read book Monolithic Phase Locked Loops and Clock Recovery Circuits written by Behzad Razavi and published by John Wiley & Sons. This book was released on 1996-04-18 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: Featuring an extensive 40 page tutorial introduction, this carefully compiled anthology of 65 of the most important papers on phase-locked loops and clock recovery circuits brings you comprehensive coverage of the field-all in one self-contained volume. You'll gain an understanding of the analysis, design, simulation, and implementation of phase-locked loops and clock recovery circuits in CMOS and bipolar technologies along with valuable insights into the issues and trade-offs associated with phase locked systems for high speed, low power, and low noise.

Download or read book Analysis and Simulation of Noise in Nonlinear Electronic Circuits and Systems written by Alper Demir and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: In electronic circuit and system design, the word noise is used to refer to any undesired excitation on the system. In other contexts, noise is also used to refer to signals or excitations which exhibit chaotic or random behavior. The source of noise can be either internal or external to the system. For instance, the thermal and shot noise generated within integrated circuit devices are in ternal noise sources, and the noise picked up from the environment through electromagnetic interference is an external one. Electromagnetic interference can also occur between different components of the same system. In integrated circuits (Ies), signals in one part of the system can propagate to the other parts of the same system through electromagnetic coupling, power supply lines and the Ie substrate. For instance, in a mixed-signal Ie, the switching activity in the digital parts of the circuit can adversely affect the performance of the analog section of the circuit by traveling through the power supply lines and the substrate. Prediction of the effect of these noise sources on the performance of an electronic system is called noise analysis or noise simulation. A methodology for the noise analysis or simulation of an electronic system usually has the following four components: 2 NOISE IN NONLINEAR ELECTRONIC CIRCUITS • Mathematical representations or models for the noise sources. • Mathematical model or representation for the system that is under the in fluence of the noise sources.

Download or read book FPGA based Implementation of Signal Processing Systems written by Roger Woods and published by John Wiley & Sons. This book was released on 2017-05-01 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: An important working resource for engineers and researchers involved in the design, development, and implementation of signal processing systems The last decade has seen a rapid expansion of the use of field programmable gate arrays (FPGAs) for a wide range of applications beyond traditional digital signal processing (DSP) systems. Written by a team of experts working at the leading edge of FPGA research and development, this second edition of FPGA-based Implementation of Signal Processing Systems has been extensively updated and revised to reflect the latest iterations of FPGA theory, applications, and technology. Written from a system-level perspective, it features expert discussions of contemporary methods and tools used in the design, optimization and implementation of DSP systems using programmable FPGA hardware. And it provides a wealth of practical insights—along with illustrative case studies and timely real-world examples—of critical concern to engineers working in the design and development of DSP systems for radio, telecommunications, audio-visual, and security applications, as well as bioinformatics, Big Data applications, and more. Inside you will find up-to-date coverage of: FPGA solutions for Big Data Applications, especially as they apply to huge data sets The use of ARM processors in FPGAs and the transfer of FPGAs towards heterogeneous computing platforms The evolution of High Level Synthesis tools—including new sections on Xilinx's HLS Vivado tool flow and Altera's OpenCL approach Developments in Graphical Processing Units (GPUs), which are rapidly replacing more traditional DSP systems FPGA-based Implementation of Signal Processing Systems, 2nd Edition is an indispensable guide for engineers and researchers involved in the design and development of both traditional and cutting-edge data and signal processing systems. Senior-level electrical and computer engineering graduates studying signal processing or digital signal processing also will find this volume of great interest.