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CMOS quadrature VCO using a passive coupling device
Author(s) -
Jang ShengLyang,
Hsieh HsuanYu,
Chang ChiaWei,
Hsue ChingWen
Publication year - 2013
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.27283
Subject(s) - dbc , phase noise , cmos , voltage controlled oscillator , figure of merit , electrical engineering , inductor , voltage , offset (computer science) , microwave , varicap , power consumption , materials science , physics , electronic engineering , optoelectronics , engineering , power (physics) , telecommunications , computer science , electrode , capacitance , quantum mechanics , programming language
This article presents a new fully‐integrated quadrature voltage‐controlled oscillator (QVCO), which consists of two differential VCOs coupled via an inductor‐ring. The proposed CMOS QVCO has been implemented with the TSMC 0.18‐μm CMOS technology and the die area is 0.693 × 0.976 mm 2 . At the supply voltage of 0.7 V, the total power consumption is 2.58 mW. The free‐running frequency of the QVCO is tunable from 5.15 to 5.55 GHz as the tuning voltage is varied from 0 to 0.7 V. The measured phase noise at 1 MHz frequency offset is −120.88 dBc/Hz at the oscillation frequency of 5.28 GHz and the figure of merit of the proposed QVCO is −191.21 dBc/Hz. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:310–313, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27283