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Frequency synthesizers. --- Frequency synthesizers --- Design and construction. --- Synthesizers, Frequency --- Frequency changers --- Oscillators, Crystal --- Signal generators

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Frequency synthesizers --- Frequenties --- Frequency synthesizers. --- frequenties --- Synthesizers, Frequency --- Frequency changers --- Oscillators, Crystal --- Signal generators --- Frequenties. --- Télécommunications --- Télécommunications --- Réseaux électriques (circuits)

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· In-depth coverage of modern digital implementations of frequency synthesis architectures· Numerous design examples drawn from actual engineering projects· The accompanying CD includes digital frequency synthesis design tools and an electronic version of the bookDigital 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 lat

Frequency synthesizers --- Phase-locked loops. --- Digital electronics. --- Design and construction. --- Digital circuits --- Digital techniques (Electronics) --- Loops, Phase-locked --- Synthesizers, Frequency --- Electronic systems --- Electronics --- Demodulation (Electronics) --- Oscillators, Electric --- Telecommunication --- Frequency changers --- Oscillators, Crystal --- Signal generators

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In recent years, there has been considerable interest in highly integrated, low power, portable wireless devices. There are three primary areas to be addressed when higher performance and lower power is desired. The first area is the device technology. Scaling of devices has realized steady improvements for many years. The second area is improved circuit design techniques. The final area is at the architectural level. This monograph focuses on the problem of low power GFSK/GMSK modulation and presents an architectural approach for improved performance. The new architecture is a modulated S-D fractional-N frequency synthesizer. The key innovation is an automatic calibration technique, which operates in the background. The availability of the calibration circuit makes high data rate, low power modulation possible. From the Foreword: "The key contribution of the work presented in this monograph is a technique for in service automatic calibration of the modulated frequency synthesizer by ensuring that the digital emphasis filter and analog loop filter characteristics are matched. The automatic calibration circuit operates while the transmitter is in service and compensates for process and temperature variation. GFSK and 4-GFSK modulation was demonstrated at data rates of 2.5 Mb/s and 5 Mb/s respectively at an RF output carrier frequency of 1.8 GHz. ... In addition, he presents some valuable tools for the practicing engineer in this field." by Charles G. Sodini.

Frequency synthesizers --- Calibration. --- Automatic control. --- Systems engineering. --- Computer engineering. --- Circuits and Systems. --- Electrical Engineering. --- Electronic circuits. --- Electrical engineering. --- Electric engineering --- Engineering --- Electron-tube circuits --- Electric circuits --- Electron tubes --- Electronics --- Synthesizers, Frequency --- Frequency changers --- Oscillators, Crystal --- Signal generators --- Electronic Circuits and Systems. --- Electrical and Electronic Engineering.

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Recently, wireless LAN standards have emerged in the market. Those standards operate in various frequency ranges. To reduce component count, it is of importance to design a multi-mode frequency synthesizer that serves all wireless LAN standards including 802.11a, 802.11b and 802.11g standards. With different specifications for those standards, designing integer-based phase-locked loop frequency synthesizers can not be achieved. Fractional-N frequency synthesizers offer the solution required for a common multi-mode local oscillator. Those fractional-N synthesizers are based on delta-sigma modulators which in combination with a divider yield the fractional division required for the desired frequency of interest. In CMOS Single Chip Fast Frequency Hopping Synthesizers for Wireless Multi-Gigahertz Applications, the authors outline detailed design methodology for fast frequency hopping synthesizers for RF and wireless communications applications. 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 book describes an efficient design and characterization methodology that has been developed to study loop trade-offs in both open and close loop modelling techniques. This is based on a simulation platform that incorporates both behavioral models and measured/simulated sub-blocks of the chosen frequency synthesizer. The platform predicts accurately the phase noise, spurious and switching performance of the final design. Therefore excellent phase noise and spurious performance can be achieved while meeting all the specified requirements. The design methodology reduces the need for silicon re-spin enabling circuit designers to directly meet cost, performance and schedule milestones. The developed knowledge and techniques have been used in the successful design and implementation of two high speed multi-mode fractional-N frequency synthesizers for the IEEE 801.11a/b/g standards. Both synthesizer designs are described in details.

Frequency synthesizers. --- Wireless communication systems --- Radio frequency oscillators. --- Equipment and supplies. --- RF oscillators --- Oscillators, Electric --- Synthesizers, Frequency --- Frequency changers --- Oscillators, Crystal --- Signal generators --- Telecommunication. --- Microwaves. --- Systems engineering. --- Electronics. --- Communications Engineering, Networks. --- Microwaves, RF and Optical Engineering. --- Circuits and Systems. --- Electronics and Microelectronics, Instrumentation. --- Electrical engineering --- Physical sciences --- Engineering systems --- System engineering --- Engineering --- Industrial engineering --- System analysis --- Hertzian waves --- Electric waves --- Electromagnetic waves --- Geomagnetic micropulsations --- Radio waves --- Shortwave radio --- Electric communication --- Mass communication --- Telecom --- Telecommunication industry --- Telecommunications --- Communication --- Information theory --- Telecommuting --- Design and construction --- Electrical engineering. --- Optical engineering. --- Electronic circuits. --- Microelectronics. --- Microminiature electronic equipment --- Microminiaturization (Electronics) --- Electronics --- Microtechnology --- Semiconductors --- Miniature electronic equipment --- Electron-tube circuits --- Electric circuits --- Electron tubes --- Mechanical engineering --- Electric engineering