This work proposed to use a two-element array of coupled PLLs to generate quadrature signals. The main advantage of this technique is that phase noise performance and quadrature accuracy do not trade-off. A dual-mode quadrature VCO designed in a digital 0.13 um CMOS technology is used as test vehicle to verify the viability of the proposed concept.
Quadrature VCOs Based on Coupled PLLs
BEVILACQUA, ANDREA;GEROSA, ANDREA;NEVIANI, ANDREA
2007
Abstract
This work proposed to use a two-element array of coupled PLLs to generate quadrature signals. The main advantage of this technique is that phase noise performance and quadrature accuracy do not trade-off. A dual-mode quadrature VCO designed in a digital 0.13 um CMOS technology is used as test vehicle to verify the viability of the proposed concept.
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