Analysis and design of a 1.8-GHz CMOS LC quadrature VCO

FREE-DOWNLOAD P Andreani, A Bonfanti… – Solid-State Circuits, …,
Abstract—This paper presents a quadrature voltage-controlled oscillator (QVCO) based on the
coupling of two LC-tank VCOs. A simplified theoretical analysis for the oscillation frequency and
phase noise displayed by the QVCO in the 1 3 region is devel- oped, and good .