DocumentCode :
260990
Title :
A low phase-noise CMOS voltage-controlled oscillator with a series LC resonator
Author :
Nam-Jin Oh
Author_Institution :
Dept. of Electron. Eng., Korea Nat. Univ. of Transp., Chungju, South Korea
fYear :
2014
fDate :
15-18 Jan. 2014
Firstpage :
1
Lastpage :
2
Abstract :
This paper proposes a novel phase-noise (PN) reduction technique for high performance voltage-controlled oscillator (VCO) using a cross-coupled series LC resonator, rather than parallel LC resonator. While the series connected inductor and capacitor enhances the fundamental frequency swing at the LC connection node, it gives a cleaner spectral purity output and suppresses the overall noise at the drain node of the cross-coupled switching cell. The proposed technique is verified using a 65 nm CMOS process with the VCO operating at around 3.6 GHz frequency range. The phase noise of the VCO is -122.4 dBc/Hz, -125.0 dBc/Hz, and -136.7 dBc/Hz at 600 kHz, 800 kHz, and 3 MHz offset frequencies, respectively, which satisfy the stringent phase noise requirements such as GSM standards operating at 900-MHz, 1800-MHz and 1900-MHz band. The proposed VCO consumes 5.6 mW dc power from a 1-V supply.
Keywords :
CMOS analogue integrated circuits; LC circuits; field effect MMIC; microwave oscillators; phase noise; voltage-controlled oscillators; cross-coupled series LC resonator; cross-coupled switching cell; low phase-noise CMOS VCO; power 5.6 mW; size 65 nm; voltage 1 V; voltage-controlled oscillator; CMOS integrated circuits; Inductors; Phase noise; Resistors; Voltage-controlled oscillators; CMOS; VCO; series LC tank;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electronics, Information and Communications (ICEIC), 2014 International Conference on
Conference_Location :
Kota Kinabalu
Type :
conf
DOI :
10.1109/ELINFOCOM.2014.6914419
Filename :
6914419
Link To Document :
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