Current-Reused QVCO Based on Source-Connection Coupling

Sung-Sun CHOI  Han-Yeol YU  Yong-Hoon KIM  

IEICE TRANSACTIONS on Electronics   Vol.E94-C   No.8   pp.1324-1327
Publication Date: 2011/08/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E94.C.1324
Print ISSN: 0916-8516
Type of Manuscript: BRIEF PAPER
Category: Microwaves, Millimeter-Waves
current-reused VCO,  low phase noise,  low power consumption,  QVCO,  source-connection coupling,  

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This paper presents a current-reused quadrature voltage-controlled oscillator (QVCO) which adopts a source-connection coupling structure. The QVCO simultaneously achieves low phase noise and low power consumption by newly combining current-reused VCOs and coupling transistors. The measured QVCO obtains good FoM of -188.2 dBc at a frequency of 2.2 GHz with 3.96 mW power consumption.