A
Ali Hajimiri
Researcher at California Institute of Technology
Publications - 286
Citations - 19702
Ali Hajimiri is an academic researcher from California Institute of Technology. The author has contributed to research in topics: CMOS & Phase noise. The author has an hindex of 60, co-authored 266 publications receiving 18160 citations. Previous affiliations of Ali Hajimiri include Stanford University & Sony Broadcast & Professional Research Laboratories.
Papers
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A general theory of phase noise in electrical oscillators
Ali Hajimiri,Thomas H. Lee +1 more
TL;DR: In this paper, a general model is introduced which is capable of making accurate, quantitative predictions about the phase noise of different types of electrical oscillators by acknowledging the true periodically time-varying nature of all oscillators.
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Jitter and phase noise in ring oscillators
TL;DR: A companion analysis of clock jitter and phase noise of single-ended and differential ring oscillators is presented in this paper, where the impulse sensitivity functions are used to derive expressions for the jitter.
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Design issues in CMOS differential LC oscillators
Ali Hajimiri,Thomas H. Lee +1 more
TL;DR: In this article, an analysis of phase noise in differential cross-coupled inductance-capacitance (LC) oscillators is presented, and the effect of tail current and tank power dissipation on the voltage amplitude is shown.
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Oscillator phase noise: a tutorial
Thomas H. Lee,Ali Hajimiri +1 more
TL;DR: The time-varying phase noise model presented in this tutorial identifies the importance of symmetry in suppressing the upconversion of 1/f noise into close-in phase noise, and provides an explicit appreciation of cyclostationary effects and AM-PM conversion.
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Concepts and methods in optimization of integrated LC VCOs
Donhee Ham,Ali Hajimiri +1 more
TL;DR: In this article, a design strategy centered around an inductance selection scheme is executed using a practical graphical optimization method to optimize phase noise subject to design constraints such as power dissipation, tank amplitude, tuning range, startup condition, and diameters of spiral inductors.