Venceslav F. Kroupa - Böcker
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3 produkter
3 produkter
2 014 kr
Skickas inom 7-10 vardagar
Phase lock loop frequency synthesis finds uses in a myriad of wireless applications - from local oscillators for receivers and transmitters to high performance RF test equipment. As the security and reliability of mobile communication transmissions have gained importance, PLL and frequency synthesisers have become increasingly topical subjects.Phase Lock Loops & Frequency Synthesis examines the various components that make up the phase lock loop design, including oscillators (crystal, voltage controlled), dividers and phase detectors. Interaction amongst the various components are also discussed. Real world problems such as power supply noise, shielding, grounding and isolation are given comprehensive coverage and solved examples with MATHCAD programs are presented throughout.* Presents a comprehesive study of phase lock loops and frequency synthesis in communication systems* Written by an internationally-recognised expert in the field* Details the problem of spurious signals in PLL frequency synthesizers, a topic neglected by available competing titles* Provides detailed theorectical background coupled with practical examples of state-of-the-art device design* MATHCAD programs and simulation software to accompany the design exercises and examples This combination of thorough theoretical treatment and guidance on practical applications will appeal to mobile communication circuit designers and advanced electrical engineering students.
1 847 kr
Skickas inom 7-10 vardagar
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.
Del 34 - IEEE Series on Digital & Mobile Communication
Frequency Stability
Introduction and Applications
Inbunden, Engelska, 2012
1 230 kr
Skickas inom 7-10 vardagar
An in-depth look at the theory and applications of frequency stabilityAn understanding of the acquisition of stable frequency is essential for anyone who needs to solve noise problems in wireless communications. This book offers a thorough introduction to the principles and applications of frequency stability, arming practicing engineers with the tools they need to minimize noise in systems and devices that affect everyday communications for millions of people.With an emphasis on both practical and scientific points of view, Frequency Stability: Introduction and Applications examines frequency and time fluctuations in resonators, as well as the stability of both standard and practical microwave oscillators. It explains noise properties of building circuit blocks, introducing time domain properties and how they relate to noise spectral densities. Including a special chapter devoted to the design and properties of phase locked loops—a crucial topic for frequency synthesizers—the book also: Examines in detail L/F noise, showing how power losses in the propagation material extend over a long period of timeCovers sapphire, optoelectronics, MW, and ring oscillators with the discussion of noise in delay-line oscillators with lasersOffers an extended treatment of phase noise in semiconductors and amplifiers based on Van der Ziel investigationsEmphasizes the modified Allan variance in the time domain, including exact computationsOutlines the relationship between resonator frequency and output phase noises via the feedback theoryFeaturing numerous tables with actual data, Frequency Stability: Introduction and Applications is an invaluable guide for engineers wishing to rein in acoustic and electromagnetic interference in modern communications.