Title :
A 49-to-62GHz CMOS quadrature VCO with bimodal enhanced magnetic tuning
Author :
Wu, Liang ; Luong, Howard C.
Author_Institution :
Dept. of Electron. & Comput. Eng., Hong Kong Univ. of Sci. & Technol., Hong Kong, China
Abstract :
A transformer-based enhanced-magnetic-tuning technique is presented to tune the frequency of millimeter-wave oscillators. By switching the polarity of the phase shift of the coupling currents, both of the two intrinsic modes in a quadrature VCO (QVCO) are exploited to achieve ultra-wide frequency tuning range. Designed and implemented in 65nm CMOS process, the QVCO with proposed bimodal enhanced-magnetic-tuning measures a continuous tuning range of 24% from 48.8 to 62.3 GHz and phase noise of -90 to -94 dBc/Hz at 1MHz offset while drawing 13 to 25 mA from 1.2-V supply, corresponding to FoM from 173 to 176 dBc and FoMT from 181 to 184 dBc.
Keywords :
CMOS integrated circuits; millimetre wave oscillators; phase noise; transformers; voltage-controlled oscillators; CMOS process; CMOS quadrature VCO; QVCO; bimodal enhanced magnetic tuning; coupling current; current 13 mA to 25 mA; frequency 1 MHz; frequency 48.8 GHz to 62.3 GHz; frequency 49 GHz to 62 GHz; millimeter-wave oscillator; phase noise; phase shift; polarity; size 65 nm; transformer; ultra-wide frequency tuning range; voltage 1.2 V; CMOS integrated circuits; CMOS technology; Coils; Couplings; Magnetic resonance; Oscillators; Tuning;
Conference_Titel :
ESSCIRC (ESSCIRC), 2012 Proceedings of the
Conference_Location :
Bordeaux
Print_ISBN :
978-1-4673-2212-6
Electronic_ISBN :
1930-8833
DOI :
10.1109/ESSCIRC.2012.6341313
