A -94 dBc/Hz@100 kHz, fully-integrated, 5-GHz, CMOS VCO with 18% tuning range for Bluetooth applications
- 1 January 2001
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 201-204
- https://doi.org/10.1109/cicc.2001.929755
Abstract
A 5-GHz, fully monolithic voltage-controlled oscillator (VCO) for Bluetooth wireless transceivers is demonstrated in a 0.25 /spl mu/m CMOS technology using accumulation mode varactors and spiral inductors. An 18% tuning range was measured for only 2.5 V tuning-voltage variation. The phase noise was -94 dBc/Hz at 100 kHz frequency offset with 40 kHz 1/f/sup 3/ corner frequency. These low values are limited by the up-conversion of flicker noise due to varactor amplitude-to-frequency conversion and to the modulation of the varactor bias point. This explanation is verified by simulations and measurements. The circuit draws 5.5 mA from a 2.5 V power supply.Keywords
This publication has 10 references indexed in Scilit:
- A 2.6 GHz/5.2 GHz CMOS voltage-controlled oscillatorPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Physical processes of phase noise in differential LC oscillatorsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- A fully-monolithic SiGe differential voltage-controlled oscillator for 5 GHz wireless applicationsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- A current-folded up-conversion mixer and VCO with center-tapped inductor in a SiGe-HBT technology for 5-GHz wireless LAN applicationsIEEE Journal of Solid-State Circuits, 2000
- A 2-GHz low-phase-noise integrated LC-VCO set with flicker-noise upconversion minimizationIEEE Journal of Solid-State Circuits, 2000
- A CMOS frequency synthesizer with an injection-locked frequency divider for a 5-GHz wireless LAN receiverIEEE Journal of Solid-State Circuits, 2000
- Comments on "Design issues in CMOS differential LC oscillators" [and reply]IEEE Journal of Solid-State Circuits, 2000
- Design issues in CMOS differential LC oscillatorsIEEE Journal of Solid-State Circuits, 1999
- Spectrum folding and phase noise in LC tuned oscillatorsIEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing, 1998
- High-Q capacitors implemented in a CMOS process for low-power wireless applicationsIEEE Transactions on Microwave Theory and Techniques, 1998