A wideband LC-VCO with enhanced PSRR for SOC applications

Author

Magierowski, Sebastian ; Iniewski, Krzysztof ; Zukotynski, Stefan

Author_Institution

Dept. of ECE, Calgary Univ., Alta., Canada

Volume

1

fYear

2004

fDate

23-26 May 2004

Abstract

Differential VCOs remain prone to common-mode power line disturbances. This limits their usefulness in SOC applications. In response, a fully integrated, 2.4-GHz 0.18-μm CMOS LC-VCO whose tank and switching core are isolated from supply noise is described. Using a balanced amplifier configuration, the effect of supply disturbances on the oscillator´s output are reduced by up to 40 dB. Further, this scheme does not compromise the VCO´s sensitivity allowing a 1-GHz (38%) tuning range. At a power dissipation of 11mW, the measured phase noise at 100-KHz offset from a 2.9-GHz carrier is -105 dBc/Hz.

Keywords

CMOS integrated circuits; amplifiers; phase noise; system-on-chip; voltage-controlled oscillators; 0.18 microns; 100 KHz; 11 mW; 2.4 GHz; 2.9 GHz; SOC applications; VCO sensitivity; balanced amplifier configuration; common-mode power line disturbances; differential VCO; enhanced PSRR; phase noise; supply disturbances; supply noise; switching core; tank core; wideband LC-VCO; Capacitance; Circuit noise; Frequency; Noise measurement; Phase noise; System-on-a-chip; Tuning; Varactors; Voltage-controlled oscillators; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on

Print_ISBN

0-7803-8251-X

Type

conf

DOI

10.1109/ISCAS.2004.1328159

Filename

1328159