Download or read book Design of Pulse Output Direct Digital Synthesizer with an Analog Filter Bank written by Aditya Pothuri and published by . This book was released on 2008 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past two decades frequency synthesizer has progressed from a relatively crystal bank synthesizer to multi-loop phase locked loops. But in recent years direct digital synthesizers (DDS) have witnessed an increase in demand over their analog counterparts. The DDS offers a wide range of advantages over phase locked loops such as high frequency range, fast switching response, and sub-hertz frequency resolution. However, the conventional DDS suffers limitations due to its architecture involving digital-to-analog converter (DAC) and read-only-memory (ROM) with respect to high clock speeds. The Pulse Output Direct Digital Synthesizer (PODDS) presented in this thesis eliminates the necessity for a DAC and ROM, and replaces the phase conversion block present in the conventional DDS with an Analog filter bank to generate the sine wave. The PODDS operates at a frequency of 2.25GHz, with a 16-b phase accumulator designed using carry look-ahead adder. The analog filter bank was designed using an array of low-pass Chebyshev filters. A frequency range of 1.1 MHz to 1.125GHz was achieved with average power consumption of 83mW.

Download or read book Direct Digital Synthesizers written by Jouko Vankka and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: A major advantage of a direct digital synthesizer is that its output frequency, phase and amplitude can be precisely and rapidly manipulated under digital processor control. This book was written to find possible applications for radio communication systems.

Download or read book Design and Analysis of Analog to Digital Converter System Clock Source Using Direct Digital Synthesizer written by Rosmiwati Mohd Mokhtar and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A requirement of multiple format standards by mobile telecommunication (GSM, CDMA, WCDMA, and TD-SCDMA) test set needs to be delivered possibly at lower cost. As to support its capability, phase-locked loop (PLL) frequency synthesizer has been designated as an essential part in most of the design within the box. The old design may be bulky and subject to many issues with the components,Äô variation and aging effect. In recent years, the direct digital synthesizer (DDS) has been popularly in used to replace the PLL architecture. This chapter will focus on the DDS selection, architecture topology, prototyping, implementation technique with both hardware and software, and performance as a clock source to a sampled system as referred to receiver interest. The key parameters in the sampled system greatly rely on the jitter and phase noise specification. If they are not properly defined, the overall signal-to-noise ratio (SNR) at the sampled system output will be impacted. Eventually the receiver quality will be degraded and resulted in tremendous loss. Thus, a proper reconstruction filter design will be delivered to ensure the jitter and phase noise performance is met without degrading the existing specification by taking accountability into the matching characteristic and signal integrity.

Download or read book Direct Digital Frequency Synthesizers written by Venceslav F. Kroupa and published by John Wiley & Sons. This book was released on 1998-11-18 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the advent of integrated circuits (IC), digital systems havebecome widely used in modern electronic devices, includingcommunications and measurement equipment. Direct Digital FrequencySynthesizers (DDS) are used in communications as transmitterexciters and local oscillators in receivers. The advantages aresuperior frequency stability, the same as that of the driving clockoscillator, and short switching times. The difficulties are loweroutput frequencies and rather large spurious signals. Compiled for practicing engineers who do not have theprerequisite of a specialist's knowledge in Direct DigitalFrequency Synthesizers (DDS), this collection of 40 importantreprinted papers and 9 never-before published contributionspresents a comprehensive introduction to DDS properties and a clearunderstanding of actual devices. The information in this volume canlead to easier computer simulations and improved designs. Featured topics include: * Discussion of principles and state of the art of wide-rangeDDS * Investigation of spurious signals in DDS * Combination of DDS with Phase Lock Loops (PLL) * Examination of phase and background 'noise' in DDS * Introduction to Digital to Analog Conversion (DAC) * Analysis of mathematics of quasiperiodic omission ofpulses DDFS can also serve as a textbook for students seeking essentialbackground theory.

Download or read book Digital Frequency Synthesis Demystified written by Bar-Giora Goldberg and published by Elsevier. This book was released on 2000-02-20 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: · In-depth coverage of modern digital implementations of frequency synthesis architectures· Numerous design examples drawn from actual engineering projectsDigital frequency synthesis is used in modern wireless and communications technologies such as radar, cellular telephony, satellite communications, electronic imaging, and spectroscopy. This is book is a comprehensive overview of digital frequency synthesis theory and applications, with a particular emphasis on the latest approaches using fractional-N phase-locked loop technology. In-depth coverage of modern digital implementations of frequency synthesis architectures Numerous design examples drawn from actual engineering projects

Download or read book Digital Synthesizers and Transmitters for Software Radio written by Jouko Vankka and published by Springer Science & Business Media. This book was released on 2005-10-25 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: The approach adopted in Digital Synthesizers and Transmitters for Software Radio will provide an understanding of key areas in the field of digital synthesizers and transmitters. It is easy to include different digital techniques in the digital synthesizers and transmitters by using digital signal processing methods, because the signal is in digital form. By programming the digital synthesizers and transmitters, adaptive channel bandwidths, modulation formats, frequency hopping and data rates are easily achieved. Techniques such as digital predistortion for power amplifier linearization, digital compensation methods for analog I/Q modulator nonlinearities and digital power control and ramping are presented in this book. The flexibility of the digital synthesizers and transmitters makes them ideal as signal generators for software radio. Software radios represent a major change in the design paradigm for radios in which a large portion of the functionality is implemented through programmable signal processing devices, giving the radio the ability to change its operating parameters to accommodate new features and capabilities. A software radio approach reduces the content of radio frequency (RF) and other analog components of traditional radios and emphasizes digital signal processing to enhance overall transmitter flexibility. Software radios are emerging in commercial and military infrastructure.

Download or read book The Design and Simulation of a Modulatable Direct Digital Synthesizer with Non Iterative Coordinate Transformation and Noise Shaping Filter written by David Norton Critchlow and published by . This book was released on 1989 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design and Implementation of an All Digital Phase Locked Loop Using a Pulse Output Direct Digital Frequency Synthesizer written by Akila Gothandaraman and published by . This book was released on 2004 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Digital Techniques in Frequency Synthesis written by Bar-Giora Goldberg and published by McGraw-Hill Companies. This book was released on 1996 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design and Implementation of a 16 bit Flexible ROM less Direct Digital Synthesizer in FPGA and CMOS 90nm Technology written by Sunny Raj Dommaraju and published by . This book was released on 2013 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: A ROM-less direct digital synthesizer architecture is presented in this thesis. This architecture eliminates the ROM-based phase to sine wave amplitude converter, which is a bottleneck for pushing clock frequencies into the gigahertz range. The design consists of a 16-bit phase accumulator, a set of 18 band pass finite impulse response filters, a 12-bit digital to analog converter and a low pass filter to produce a sine wave with output frequencies ranging from 36 MHz to 72 MHz with a resolution of 3.05 kHz and a 55 dB spur free dynamic range. The same hardware can be used to achieve output frequency ranging from hertz to gigahertz and a 191 Hz resolution by changing the clock frequency. A resolution of 0.05 Hz can be achieved by using a 32-bit phase accumulator. The average phase noise obtained was -87 dBc/Hz at 100 kHz offset, -118 dBc/Hz at 1 MHz offset and -151 dBc/Hz at 5 MHz offset. This design was implemented on Virtex-6 FPGA. The analysis results of FPGA data show that the proposed design is an effective alternative. An ASIC design was also implemented in CMOS 90nm technology to reach higher frequency ranges.

Download or read book Direct Digital Synthesizers written by and published by . This book was released on 1985 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: Frequency synthesizers are one of the principal building blocks of precise time and frequency system. Direct digital synthesizers (DDS) have become increasingly important as the need for small, low power, high resolution, wide frequency range, fast settling, high spectral purity synthesizers has grown. This paper reviews the various types of DDS's and the principles of their design. DDS architectures fall into 6 major categories: pulse output, sine output, triangle output, phase interpolation, jitter injection, and fractional divider or pulse snatching DDS's. The details, design principles, and performance characteristics of these categories are reviewed and the pros and cons of one category verses another are presented. included is a discussion of the relationships between the design parameters of the various types of DDS's and synthesizer performance parameters such as spectral purity, phase jitter, frequency range, frequency resolution, and settling time. Of prime importance in the design of these DDS's are the requirements on spurious sideband and phase jitter levels. A theory for predicting these spur and jitter levels and of relating these levels to DDS design parameters is presented. It is shown that DDS spurs can be understood as coming from harmonic distortion in the DDS output which is aliased down to lower frequencies due to the discrete stepped nature of DDS operation. The relationship of the sizes and frequencies of these aliasing spurs to DDS parameters is discussed showing that spur considerations place fundamental limitations on the permissible frequency range of the DDS. A quantitative theory explaining how jitter injection reduces spur levels is also presented.

Download or read book Electrical Electronics Abstracts written by and published by . This book was released on 1997 with total page 1904 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wideband Radar written by Teng Long and published by Springer Nature. This book was released on 2022-12-09 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wideband Radar focuses on system theories and signal processing techniques for wideband radar systems. Author Professor Teng Long and his fellows present a comprehensive introduction to the fundamental theory, latest technology developments in signal processing and recent progresses in civil applications of wideband radar. Each chapter begins with an introduction describing what a reader will find in that chapter. The book is addressed to all scientists, whether at universities or in industry, who wish to keep abreast of the important advances in wideband radar. We look forward to further excitement ahead and new developments in wideband radar, and we hope to share them with you, our esteemed readers.

Download or read book Basic Linear Design written by Hank Zumbahlen and published by . This book was released on 2005-01-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

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 Digital Signal Processing System Level Design Using LabVIEW written by Nasser Kehtarnavaz and published by Elsevier. This book was released on 2011-04-01 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: LabVIEW (Laboratory Virtual Instrumentation Engineering Workbench) developed by National Instruments is a graphical programming environment. Its ease of use allows engineers and students to streamline the creation of code visually, leaving time traditionally spent on debugging for true comprehension of DSP. This book is perfect for practicing engineers, as well as hardware and software technical managers who are familiar with DSP and are involved in system-level design. With this text, authors Kehtarnavaz and Kim have also provided a valuable resource for students in conventional engineering courses. The integrated lab exercises create an interactive experience which supports development of the hands-on skills essential for learning to navigate the LabVIEW program. Digital Signal Processing System-Level Design Using LabVIEW is a comprehensive tool that will greatly accelerate the DSP learning process. Its thorough examination of LabVIEW leaves no question unanswered. LabVIEW is the program that will demystify DSP and this is the book that will show you how to master it. * A graphical programming approach (LabVIEW) to DSP system-level design * DSP implementation of appropriate components of a LabVIEW designed system * Providing system-level, hands-on experiments for DSP lab or project courses