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IEICE TRANSACTIONS on Electronics

A Complementary-Coupled CMOS LC Quadrature Oscillator

Seok-Ju YUN, Dae-Young YOON, Sang-Gug LEE

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Summary :

A novel CMOS LC quadrature oscillator (QO) which adopts complementary-coupling circuitry has been proposed. The performance improvement in I/Q phase error and phase noise of the proposed QO, is explained in comparison with conventional QOs. The proposed QO is implemented in 0.18 µm CMOS technology along with conventional QOs. The measurement result of the proposed QO shows -133.5 dBc/Hz of phase noise at 1 MHz offset and 0.6 I/Q phase difference, while oscillating at 1.77 GHz. The proposed QO shows more than 6.5 dB phase noise improvement compared to that of the conventional QOs over the offset frequency range of 10 K-1 MHz, while dissipating 4 mA from 1.4 V supply.

Publication
IEICE TRANSACTIONS on Electronics Vol.E91-C No.11 pp.1806-1810
Publication Date
2008/11/01
Publicized
Online ISSN
1745-1353
DOI
10.1093/ietele/e91-c.11.1806
Type of Manuscript
PAPER
Category
Electronic Circuits

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