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Browse Journals & Magazines > Circuits and Systems II: Expr ...> Volume:59 Issue:1 Help

Quality Factor Analysis for Cross-Coupled LC Oscillators Using a Time-Varying Root Locus

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2 Author(s)
Broussev, S.S. ; Dept. of Commun. Eng., Tampere Univ. of Technol., Tampere, Finland ; Tchamov, N.T.

An extraction of an effective oscillator Q factor in cross-coupled LC oscillators using time-varying root locus is proposed. The extraction utilizes root computations and analytical expression of the cross-coupled-pair admittance. The methodology permits to investigate the Q-factor degradation mechanisms in large-signal LC oscillators and to compare different oscillator topologies. The obtained effective Q factor is validated through SpectreRF simulations and phase noise measurements of a voltage-controlled oscillator fabricated on a 130-nm process.

Published in:
Circuits and Systems II: Express Briefs, IEEE Transactions on  (Volume:59 ,  Issue: 1 )

Date of Publication: Jan. 2012

Page(s):
25 - 29
ISSN :
1549-7747
INSPEC Accession Number:
12472350
Digital Object Identifier :
10.1109/TCSII.2011.2174673
Product Type:
Journals & Magazines
Date of Publication :
23 November 2011
Date of Current Version :
16 January 2012
Issue Date :
Jan. 2012
Sponsored by :
IEEE Circuits and Systems Society

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