Title :
A low phase noise quadrature LC VCO in CMOS technology
Author :
Sze, Bour-Yi ; Ho, Chih-Long
Author_Institution :
VIA Technol. Inc., Taipei, Taiwan
Abstract :
A quadrature LC VCO is designed and fabricated using a standard 0.18 μm CMOS process. The oscillation frequency can be tuned from 1400 to 1530 MHz through a 2-bit switched capacitor array. The measured free running phase noise is -125.04 dBc/Hz at 600 kHz offset from the 1.52 GHz carrier. The measured harmonic distortion is below -26 dBc. The designed VCO has achieved the figure of merit (FOM) of -185.4 dBc/Hz, which is the best among the compared VCOs with on-chip inductors using a standard CMOS process.
Keywords :
CMOS analogue integrated circuits; UHF oscillators; harmonic distortion; integrated circuit design; nonlinear network synthesis; phase noise; switched capacitor networks; voltage-controlled oscillators; 0.18 micron; 1400 to 1530 MHz; CMOS technology; figure of merit; harmonic distortion; low phase noise quadrature LC VCO; on-chip inductors; oscillation frequency tuning; switched capacitor array; CMOS process; CMOS technology; Capacitors; Distortion measurement; Frequency; Harmonic distortion; Noise measurement; Phase measurement; Phase noise; Voltage-controlled oscillators;
Conference_Titel :
Radio Frequency integrated Circuits (RFIC) Symposium, 2005. Digest of Papers. 2005 IEEE
Print_ISBN :
0-7803-8983-2
DOI :
10.1109/RFIC.2005.1489897
