Title :
CMOS LC quadrature oscillators with enhanced tuning range by selective mode switching
Author :
Bagheri, Mahdi ; Bagheri, Rahim ; Larson, Lawrence E.
Author_Institution :
Univ. of California San Diego, La Jolla, CA, USA
Abstract :
Quadrature oscillators (QOSCs) can operate in two selective modes of quadrature oscillation. By controlling the mode of oscillation, different wide tuning range CMOS LC QOSCs have been designed. The measured tuning range is 60% for 3.7 GHz design and 94% for 1.3 GHz design. Phase noise measurement shows that by this modified series coupled QOSC (S-QOSC) a FOMT (figure of merit with tuning range) of 199 dB can be achieved.
Keywords :
CMOS analogue integrated circuits; MMIC oscillators; UHF integrated circuits; UHF oscillators; circuit tuning; field effect MMIC; phase noise; CMOS LC quadrature oscillators; figure of merit; frequency 1.3 GHz; frequency 3.7 GHz; modified series coupled QOSC; phase noise measurement; quadrature oscillation; selective mode switching; wide tuning range CMOS LC QOSC; CMOS integrated circuits; Frequency measurement; Phase measurement; Phase noise; Quality of service; Tuning; CMOS; phase noise; quadrature oscillator; tuning range;
Conference_Titel :
Radio Frequency Integrated Circuits Symposium (RFIC), 2012 IEEE
Conference_Location :
Montreal, QC
Print_ISBN :
978-1-4673-0413-9
Electronic_ISBN :
1529-2517
DOI :
10.1109/RFIC.2012.6242285
