@conference {4253094,
	title = {Quadrature VCOs Based on Coupled PLLs},
	booktitle = {IEEE International Symposium on Circuits and Systems, 2007. ISCAS 2007},
	year = {2007},
	pages = {2140 -2143},
	keywords = {0.13 micron, CMOS digital integrated circuits, coupled PLL, digital CMOS technology, dual-mode quadrature VCO, phase locked loops, quadrature signal generation, voltage-controlled oscillators},
	doi = {10.1109/ISCAS.2007.378596},
	author = {Bevilacqua, A. and Sandner, C. and Gerosa, A. and Neviani, A.}
}
