DocumentCode :
3248441
Title :
An optimally coupled 5 GHz quadrature LC oscillator
Author :
van de Ven, P. ; van der Tang, J. ; Kasperkovitz, D. ; van Roermund, Arthur
Author_Institution :
Philips Res. Lab., Eindhoven, Netherlands
fYear :
2001
fDate :
14-16 June 2001
Firstpage :
115
Lastpage :
118
Abstract :
A 5 GHz quadrature LC oscillator is realized which is based on a new architecture for multi-phase LC oscillators. Each section in the oscillator is coupled with an explicit phase shift of 180 degrees divided by the number of sections. Analysis on behavioral level shows that this maximizes the quality factor, and as a result, the carrier-to-noise ratio and robustness. An effective quality factor is derived which quantizes the degradation in phase noise performance if the sections of a multiphase LC oscillator are non-optimally coupled. The realized 5 GHz quadrature LC oscillator demonstrates that even at high frequencies the additional complexity of the proposed architecture yields a CNR improvement. The oscillator is realized in a BiCMOS process with a cut-off frequency of 30 GHz using an LC resonator with a quality factor of 4. A tuning range from 4.91 to 5.23 GHz is obtained with a CNR better than 113 dBc/Hz at 2 MHz offset. The VCO core power dissipation is only 21.2 mW at 2.7 V supply voltage.
Keywords :
BiCMOS analogue integrated circuits; MMIC oscillators; Q-factor; circuit tuning; coupled circuits; integrated circuit noise; phase noise; voltage-controlled oscillators; 2.7 V; 21.2 mW; 4.91 to 5.23 GHz; BiCMOS process; LC resonator; carrier-to-noise ratio; core power dissipation; cut-off frequency; multi-phase LC oscillators; phase noise performance; quadrature LC oscillator; quality factor; tuning range; BiCMOS integrated circuits; Cutoff frequency; Degradation; Noise robustness; Phase noise; Power dissipation; Q factor; Tuning; Voltage; Voltage-controlled oscillators;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
VLSI Circuits, 2001. Digest of Technical Papers. 2001 Symposium on
Conference_Location :
Kyoto, Japan
Print_ISBN :
4-89114-014-3
Type :
conf
DOI :
10.1109/VLSIC.2001.934211
Filename :
934211
Link To Document :
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