Phase noise analysis of fully-integrated digitally-tuned wideband Si/SiGe BiCMOS VCOs

Author

Lie, D.Y.C. ; Yuan, X. ; Larson, L.E. ; Robinson, T. ; Senior, A. ; Mecke, J. ; Wang, X.

fYear

2002

fDate

2002

Firstpage

65

Lastpage

68

Abstract

A 3.4-4.6 GHz fully monolithic voltage-controlled Oscillator (VCO) was designed and manufactured using Silicon Germanium (SiGe) BiCMOS technology. The large tuning range (33%) and low-phase noise: (-108 dBc/Hz @100 kHz offset at 3.4 GHz) are achieved with a combination of coarse tuning via digital selection of MOSCAPs and analog fine-tuning using P-N junction varactors. Approximately 7-10 dB phase noise degradation at 3 MHz offset is observed as the oscillator is digitally switched from the lowest frequency band to the highest band. The role substrate parasitics play on the behavior of phase noise during digital switching is clarified.

Keywords

BiCMOS analogue integrated circuits; BiCMOS digital integrated circuits; Ge-Si alloys; MOS capacitors; elemental semiconductors; integrated circuit noise; microwave integrated circuits; microwave oscillators; phase noise; semiconductor materials; silicon; varactors; voltage-controlled oscillators; 3.4 to 4.6 GHz; 7 to 10 dB; MOSCAPs; P-N junction varactors; Si-SiGe; analog fine tuning; coarse tuning; digital selection; digital switching; fully monolithic Voltage-Controlled Oscillator; fully-integrated digitally-tuned wideband Si/SiGe BiCMOS VCOs; low-phase noise; lowest frequency band; phase noise; phase noise analysis; phase noise degradation; silicon germanium BiCMOS technology; substrate parasitics; tuning range; BiCMOS integrated circuits; Germanium silicon alloys; Manufacturing; P-n junctions; Phase noise; Silicon germanium; Tuning; Varactors; Voltage-controlled oscillators; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Bipolar/BiCMOS Circuits and Technology Meeting, 2002. Proceedings of the 2002

ISSN

1088-9299

Print_ISBN

0-7803-7561-0

Type

conf

DOI

10.1109/BIPOL.2002.1042888

Filename

1042888