Download Free Fast Hopping High Frequency Carrier Generation In Digital Cmos Technology Book in PDF and EPUB Free Download. You can read online Fast Hopping High Frequency Carrier Generation In Digital Cmos Technology and write the review.

One of the challenges in implementing a frequency synthesizer for Multi-band OFDM Ultra Wideband (MB-OFDM UWB) is overcoming the agility limitations of conventional synthesizers. The MB-OFDM proposal for UWB divides the spectrum from 3.1 GHz to 10.6 GHz into 14 different bands, and frequency hops at the rate of 3.2 MHz between them with a specified frequency settling time of only 9.5 nS. Design techniques that eliminate the use of on-chip inductors, and which are compatible with low voltage operation, are critical for increasing the level of integration for future implementations. An inductor-less design methodology may have several advantages over traditional design techniques: (1) While the area required to implement an on-chip inductor does not scale down in the finer technology nodes, inductor-less designs benefit from technology scaling. (2) On the other hand, the quality factor of the on-chip inductors may worsen in finer technology nodes, which can lead to an increase in the required current consumption to generate a given voltage swing. (3) It is more straightforward to port an inductor-less design into a new technology node. The penalty for an inductor-less design methodology is a slightly increase in the current consumption to achieve the necessary gain and voltage swing in the absence of inductors. In this work, a frequency plan is proposed that can generate all the required frequencies from a single fixed frequency and can implement any center frequency with a maximum of two levels of SSB mixing. In order to generate all the required frequencies for the operation of this frequency synthesizer out of a single frequency, fractional frequency dividers are needed. Therefore, a study is performed on the architectures that can obtain a fractional division ratio. This study involves an analysis of the operation, stability, and phase noise of injection-locked regenerative frequency dividers. In addition, the operation, stability, locking range, and phase noise of two-stage ring-oscillators, which are compact ways to generate quadrature output phases and can be used in injection-locked regenerative frequency dividers, are analyzed. This work presents the first CMOS inductor-less single PLL 14-band frequency synthesizer for MB-OFDM UWB which is capable to perform any arbitrary band switching specified in less than 2 nS. Implemented in a 0.13 & mu;m CMOS process, it uses a single 1.2 V supply voltage, and dissipates 135 mW. The mixing sideband level is better than -31 dBc and the phase noise is better than -110 dBc/Hz at 1 MHz offset.
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.
In this book, the authors outline detailed design methodology for fast frequency hopping synthesizers for RF and wireless communications applications. There is great emphasis on fractional-N delta-sigma based phase locked loops from specifications, system analysis and architecture planning to circuit design and silicon implementation. The developed techniques in the book can help in designing very low noise, high speed fractional-N frequency synthesizers.
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
There is an ever-increasing trend towards putting entire systems on a single chip. This means that analog circuits will have to coexist on the same substrate along with massive digital systems. Since technologies are optimized with these digital systems in mind, designers will have to make do with standard CMOS processes in the years to come. Filters form important blocks in applications ranging from computer disc-drive chips to radio transceivers. High Frequency Continuous Time Filters in Digital CMOS Processes addresses the theoretical and practical problems encountered in the design of robust, programmable continuous-time filters with very high bandwidths, implemented in low-cost digital CMOS technologies. A high performance programmable filter architecture, called `constant-capacitance scaling', is discussed in detail. This technique has the potential for very high-speed operation, and ensures that frequency response shape, noise and dynamic range are maintained as bandwidth is programmed. High Frequency Continuous Time Filters in Digital CMOS Processes will be of interest to analog circuit designers as well as researchers interested in filter and network theory.
This paper reviews recent developments of interleaved Successive Approximation Analog-to-Digital converters (SAR) in deep sub-micron CMOS technologies. The discussion covers design tradeoffs and degrees of freedom related to the impact of extensive interleaving with many SAR units on bandwidth, noise, linearity, and spurious performance. The impact of interleaving mismatches on representative broadband and multi-carrier narrowband signals is also discussed. Next, two examples are given demonstrating how interleaving with many ADCs can be transformed from a weakness to a strength. The first example concerns low spurious performance enabled by redundant SAR converters and randomization of their operation. The second example presents spectral sensing techniques.
A new and innovative paradigm for RF frequency synthesis and wireless transmitter design Learn the techniques for designing and implementing an all-digital RF frequency synthesizer. In contrast to traditional RF techniques, this innovative book sets forth digitally intensive design techniques that lead the way to the development of low-cost, low-power, and highly integrated circuits for RF functions in deep submicron CMOS processes. Furthermore, the authors demonstrate how the architecture enables readers to integrate an RF front-end with the digital back-end onto a single silicon die using standard ASIC design flow. Taking a bottom-up approach that progressively builds skills and knowledge, the book begins with an introduction to basic concepts of frequency synthesis and then guides the reader through an all-digital RF frequency synthesizer design: Chapter 2 presents a digitally controlled oscillator (DCO), which is the foundation of a novel architecture, and introduces a time-domain model used for analysis and VHDL simulation Chapter 3 adds a hierarchical layer of arithmetic abstraction to the DCO that makes it easier to operate algorithmically Chapter 4 builds a phase correction mechanism around the DCO such that the system's frequency drift or wander performance matches that of the stable external frequency reference Chapter 5 presents an application of the all-digital RF synthesizer Chapter 6 describes the behavioral modeling and simulation methodology used in design The final chapter presents the implementation of a full transmitter and experimental results. The novel ideas presented here have been implemented and proven in two high-volume, commercial single-chip radios developed at Texas Instruments: Bluetooth and GSM. While the focus of the book is on RF frequency synthesizer design, the techniques can be applied to the design of other digitally assisted analog circuits as well. This book is a must-read for students and engineers who want to learn a new paradigm for RF frequency synthesis and wireless transmitter design using digitally intensive design techniques.
Analog Circuit Design contains eighteen tutorials, reflecting the contributions of six experts, as presented at the 15th workshop on Advances in Analog Circuit Design (AACD). Provides 18 overviews of analog circuit design in High-Speed A-D Converters, Automotive Electronics and Ultra-Low Power Wireless. An essential reference source for the latest developments in the field, tutorial coverage makes it suitable for advanced design courses.