A 1.8-V 2.4/5.15-GHz dual-band LC VCO in 0.18-μm CMOS technology

A dual band, fully integrated, low phase-noise and low-power voltage-controlled oscillator (VCO) operating at the 2.4-GHz industrial scientific and medical band and 5.15-GHz unlicensed national information infrastructure band has been demonstrated in an 0.18-um CMOS process. At 1.8-V power supply voltage, the power dissipation is only 5.4mWfor a 2.4-GHz band and 8 mWfor a 5.15-GHz band. The proposed VCO features phase-noise of 135 dBc/Hz at 3-MHz offset frequency away from the carrier frequency of 2.74 GHz and 126 dBc/Hz at 3-MHz offset frequency away from 5.49 GHz. The oscillator is tuned from 2.2 to 2.85 GHz in the low band (2.4-GHz band) and from 4.4 to 5.7 GHz in the high band (5.15-GHz band).Published versio