IEEE Microwave and Wireless Components Letters · 2005 · 42 citations · 16 references
EngineeringElectrical EngineeringLow-power DesignMicroelectronicsSemiconductor DevicesCmos Circuit DesignHigh-frequency Semiconductor DevicesLow-noise Circuit DesignMicrowave OscillatorsNoise In Analog CircuitsRadio-frequency Integrated CircuitsCmos Analog Circuit DesignCmos Analog Integrated CircuitsCmos OscillatorsCmos Radio-frequency CircuitsLow-power Cmos DesignOscillator Topology DesignPhase NoiseVoltage-controlled Oscillator Design
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.
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A 900 MHz CMOS LC-oscillator with quadrature outputs
A. Rofougaran, J.J. Rael, M. Rofougaran et al. · 2002 · 531 citations
Analysis and design of a 1.8-GHz CMOS LC quadrature VCO
Pietro Andreani, Andrea Bonfanti, L. Romano et al. · IEEE Journal of Solid-State Circuits · 2002 · 408 citations · Full text