Current reused LC VCOs

This paper presents current reused voltage controlled oscillator (VCO) topologies by stacking switching transistors in series like a cascode. The VCOs can operate with only half the amount of dc current compared to those of the conventional VCO topologies. Fabricated in 0.18-μm CMOS process, a diffe...

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Veröffentlicht in:	IEEE microwave and wireless components letters 2005-11, Vol.15 (11), p.736-738
Hauptverfasser:	OH, Nam-Jin, LEE, Sang-Gug
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Circuit properties Circuit topology CMOS CMOS technology Design. Technologies. Operation analysis. Testing differential voltage controlled oscillator (VCO) Electric, optical and optoelectronic circuits Electronic circuits Electronics Energy consumption Exact sciences and technology Frequency conversion Inductors Integrated circuits Oscillators, resonators, synthetizers phase noise quadrature VCO (QVCO) radio-frequency (RF) Radiofrequency integrated circuits Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Signal generators Transceivers Varactors Voltage-controlled oscillators
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Beschreibung
Zusammenfassung:	This paper presents current reused voltage controlled oscillator (VCO) topologies by stacking switching transistors in series like a cascode. The VCOs can operate with only half the amount of dc current compared to those of the conventional VCO topologies. Fabricated in 0.18-μm CMOS process, a differential VCO operates in a 2.1-GHz band with a phase noise of -110dBc/Hz at 1-MHz offset, and a quadrature VCO operates in a 3.1-GHz band with a phase noise of -102dBc/Hz at 1-MHz offset. The proposed topologies can be adopted for low-power applications.
ISSN:	1531-1309 2771-957X 1558-1764 2771-9588
DOI:	10.1109/LMWC.2005.858993