Published May 1, 1999
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Journal Article
Open
Design issues in CMOS differential LC oscillators
- Creators
-
Hajimiri, Ali
- Lee, Thomas H.
Chicago
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Abstract
An analysis of phase noise in differential cross-coupled inductance-capacitance (LC) oscillators is presented. The effect of tail current and tank power dissipation on the voltage amplitude is shown. Various noise sources in the complementary cross-coupled pair are identified, and their effect on phase noise is analyzed. The predictions are in good agreement with measurements over a large range of tail currents and supply voltages. A 1.8 GHz LC oscillator with a phase noise of -121 dBc/Hz at 600 kHz is demonstrated, dissipating 6 mW of power using on-chip spiral inductors.
Additional Information
© Copyright 1999 IEEE. Reprinted with permission. Manuscript received September 20, 1998; revised December 22, 1998. The authors would like to acknowledge Dr. G. Nasserbakht, H. Samavati, M. Hershenson, and H. Rategh for valuable technical discussions. They also acknowledge the technical contributions by S. Limotyrakis in particular. They would further like to thank Texas Instruments, Inc., for fabrication of the oscillators.Files
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- CaltechAUTHORS:HAJieeejssc99b
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