Title :
Multiple-GHz ring and LC VCOs in 0.18 μm CMOS
Author :
Eken, Yalcin Alper ; Uyemura, John P.
Author_Institution :
Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
This work presents a comparison of the ring and LC VCOs to be used in multiple-GHz communication systems. Multiple-GHz CMOS ring and LC VCOs are implemented on the same chip and tested under similar conditions for a fair comparison. The prototype chip was fabricated using a 0.18 μm CMOS process and includes three-stage ring and symmetrical LC VCOs aimed for this comparison. The ring VCO dissipates 50 mW at an oscillation frequency of 6.1 GHz, and exhibits -97.5 dBc/Hz phase noise (@ 1 MHz). The LC VCO has a maximum frequency of 3 GHz with a 46% tuning range and has -111.4dBc/Hz phase noise (@1 MHz) while using 3.6 mW.
Keywords :
CMOS integrated circuits; MMIC oscillators; circuit tuning; integrated circuit measurement; integrated circuit modelling; integrated circuit noise; phase noise; radio equipment; resonators; voltage-controlled oscillators; 0.18 micron; 3 GHz; 3.6 mW; 50 mW; 6.1 GHz; CMOS VCO; CMOS process; LC VCO; communication systems; delay circuits; maximum frequency; multiple-GHz ring VCO; oscillation frequency; phase noise; prototype chip; resonators; symmetrical LC VCO; test conditions; three-stage ring VCO; tuning range; voltage controlled oscillators; CMOS process; Circuit optimization; Frequency; Inductors; Phase noise; Prototypes; Q factor; Ring oscillators; Tuning; Voltage-controlled oscillators;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 2004. Digest of Papers. 2004 IEEE
Print_ISBN :
0-7803-8333-8
DOI :
10.1109/RFIC.2004.1320658
