Title :
A CMOS differential noise-shifting Colpitts VCO
Author :
Aparicio, R. ; Hajimiri, A.
Author_Institution :
California Inst. of Technol., Pasadena, CA, USA
Abstract :
A 0.35 /spl mu/m VCO uses current switching to increase voltage swing, lower phase noise by cyclostationary noise alignment, and improve startup reliability. A CMOS VCO in a 3-metal, 0.35 /spl mu/m process has -139 dBc/Hz phase noise at 3 MHz offset from a 1.8 GHz carrier and 30% of continuous tuning using inductors with Q of 6 and 4 mA dc current.
Keywords :
CMOS analogue integrated circuits; UHF integrated circuits; UHF oscillators; circuit tuning; integrated circuit noise; integrated circuit reliability; phase noise; voltage-controlled oscillators; 0.35 micron; 1.8 GHz; 4 mA; CMOS differential noise-shifting Colpitts VCO; DC current; Q-factor; current switching; cyclostationary noise alignment; inductor; phase noise; startup reliability; tuning range; voltage swing; Circuit topology; Integrated circuit noise; MOSFETs; Noise figure; Noise generators; Phase modulation; Phase noise; Switches; Tail; Voltage-controlled oscillators;
Conference_Titel :
Solid-State Circuits Conference, 2002. Digest of Technical Papers. ISSCC. 2002 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-7335-9
DOI :
10.1109/ISSCC.2002.993045
