A 74%, 1.56-2.71 GHz, wide-tunable LC-tuned VCO in 0.35-mu m CMOS technology

Abstract

A wide-tuning monolithic LC-tuned VCO is presented. The proposed VCO wide, tuning hi utilizing binary weighted switched varactor combination operating at minimum or maximum value in addition to a linearly varying interpolation varactor. Measurements show 74% of tuning at it range of 1.56-2.71 GHz. with the phase noise ranging from -136 dBc/Hz to -108 dBc/Hz at 1 MHz offset. The VCO is implemented in 0.35-mum CMOS technology and dissipates 10.3 mA from a 3-V supply. (C) 2003 Wiley Periodicals, Inc.