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http://dx.doi.org/10.13067/JKIECS.2012.7.4.715

Hybrid Balanced VCO Suitable for Sub-1V Supply Voltage Operation  

Jeon, Man-Young (동양대학교 정보통신공학과)
Kim, Kwang-Tae (경북대학교 산업전자공학과)
Publication Information
The Journal of the Korea institute of electronic communication sciences / v.7, no.4, 2012 , pp. 715-720 More about this Journal
Abstract
This study presents a hybrid balanced voltage controlled oscillator (VCO) circuit which is suitable for low phase noise operation at sub-1V supply voltages. Half circuits of the proposed VCO use the varactor-integrated feedback capacitors in their respective circuit. The varactor-integrated feedback capacitors further increase the negative resistance of the equivalent tank thereby ensuring stable start-up of oscillation even at the sub-1V supply voltage. In addition, this work theoretically analyses the phenomenon of the increase of the negative resistance. Simulation results using a $0.18{\mu}m$ RF CMOS technology exhibit the phase noises of -122.4 to -125.5.8 dBc/Hz at 1 MHz offset from oscillation frequency of 4.87 GHz over the supply voltages of 0.6 through 0.9 V.
Keywords
VCO; Colpitts-VCO; Sub-1V VCO; Balanced Oscillator;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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