Title :
A 1.3 GHz low-phase noise fully tunable CMOS LC VCO
Author :
Svelto, Francesco ; Deantoni, Stefano ; Castello, Rinaldo
Author_Institution :
Dipt. di Ingegneria, Bergamo Univ., Dalmine, Italy
fDate :
3/1/2000 12:00:00 AM
Abstract :
This paper presents a low-phase noise CMOS LC-VCO, in which a complete compensation of the component spread, due to process variations, can be done. The LC tank is made of a metal-oxide-silicon varactor and a bondwire and a spiral inductor in series. The trade-off between VCO gain variations and phase noise is introduced. The measurements performed on a prototype, powered by a 2-V supply, realized in a digital CMOS process, are presented. The oscillation frequency can be varied in the range 1.1-1.45 G-Hz. The measured phase noise at an offset of 600 kHz from a 1.3-GHz carrier is -119 dBc/Hz, with 6-mA current consumption.
Keywords :
CMOS analogue integrated circuits; UHF integrated circuits; UHF oscillators; circuit tuning; compensation; integrated circuit design; phase noise; varactors; voltage-controlled oscillators; 1.1 to 1.45 GHz; 2 V; 6 mA; VCO gain variations; compensation; current consumption; fully tunable CMOS LC VCO; low-phase noise circuit; metal-oxide-silicon varactor; oscillation frequency; process variations; Bonding; CMOS process; Frequency; Inductors; Performance evaluation; Phase noise; Prototypes; Spirals; Varactors; Voltage-controlled oscillators;
Journal_Title :
Solid-State Circuits, IEEE Journal of
