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A quadrature CMOS clapp voltage-controlled oscillator

✍ Scribed by Sheng-Lyang Jang; Hsiu-An Yeh; Chia-Wei Chang; Miin-Horng Juang; Han-Sheng Chen

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
359 KB
Volume
53
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

A new fully integrated, CMOS Clapp quadrature voltage‐controlled oscillator (QVCO) is presented.The QVCO is composed of two differential n‐core Clapp VCOs coupled by four pMOSFETs and was implemented in the 0.18‐μm CMOS technology with 0.9‐V supply voltage. The die area is 0.574 × 0.866 mm^2^. At the supply voltage of 0.9 V, the total power consumption is 12.2 mW. The free‐running frequency of the QVCO is tunable from 7.89 to 9.3 GHz as the tuning voltage is varied from 0 to 2 V. The measured phase noise at 1‐MHz frequency offset is −118.65 dBc/Hz at the oscillation frequency of 7.89 GHz, and the figure of merit of the proposed QVCO is about −185.71 dBc/Hz. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26109

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