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Low-noise CMOS LC oscillator with dual-ring structure

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3 Author(s)
J. J. Kim ; Hynix Semicond. Inc., Seoul, South Korea ; Y. Lee ; S. -B. Park

A dual-ring structure of LC resonators is presented to improve the phase noise performance much further, keeping the multi-phase output capability. This dual-ring oscillator is fabricated in a 0.25 μm CMOS process and achieves the measured phase noise of -137 dBc/Hz at 1 MHz offset from a 2.27 GHz carrier.

Published in:

Electronics Letters  (Volume:40 ,  Issue: 17 )