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OverviewThe tremendous growth in wireless and mobile communications has placed stringent requirements on channel spacing and, by implication, on the phase noise of oscillators. Compounding the challenge has been a recent drive toward implementations of transceivers in CMOS, whose inferior l/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. The continued drive toward higher clock frequencies translates into a demand for ever-decreasing jitter. There is a need for a deep understanding of the fundamental mechanisms governing 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. This text offers a time-variant phase noise model for low noise oscillators. By discarding the implicit assumption of time-invariance underlying many other approaches, this model is capable of making quantitative predictions of the phase noise and jitter of different types of oscillators. It is able to attribute a definite amount of phase noise to every noise source in the circuit. Because of its time-variant nature, the model also takes into account the effect of cyclostationary noise sources in a natural way. It details the precise mechanism by which low frequency noise, such as l/f noise, upconverts into close-in phase noise. An important understanding is that rise and fall time symmetry controls such upconversion. More importantly, it suggests practical methods for suppressing this upconversion, so that good oscillators can be built in technologies with notoriously poor l/f noise performance (such as CMOS or GaAs MESFET). The book should be of interest to both analog and digital circuit as well as RF circuit designers. Full Product DetailsAuthor: Ali Hajimiri , Thomas H. LeePublisher: Springer Imprint: Springer Edition: 1999 ed. Dimensions: Width: 15.60cm , Height: 1.40cm , Length: 23.40cm Weight: 1.090kg ISBN: 9780792384557ISBN 10: 0792384555 Pages: 208 Publication Date: 28 February 1999 Audience: College/higher education , Professional and scholarly , Postgraduate, Research & Scholarly , Professional & Vocational Format: Hardback Publisher's Status: Active Availability: Out of print, replaced by POD  We will order this item for you from a manufatured on demand supplier. Table of ContentsFrequency Instability Fundamentals.- Review of Existing Models.- Time-Variant Phase Noise Model.- Jitter and Phase Noise in Ring Oscillators.- Phase Noise in Differential LC Oscillators.- Extension of the Model to Multiple Noise Sources.- Conclusion.ReviewsAuthor InformationTab Content 6Author Website:Countries AvailableAll regions |
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