A 4.8GHz Low-Phase Noise Quadrature Colpitts VCO

Author

Jang, Sheng-Lyang ; Chuang, Yun-Hsueh ; Lee, Chien-Feng ; Lee, Shao-Hua

Author_Institution

Dept. of Electron. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei

fYear

2006

fDate

26-28 April 2006

Firstpage

1

Lastpage

4

Abstract

A 4.8GHz low-noise quadrature Colpitts VCO is presented. Use of the current switching differential Colpitts configuration together with super harmonic coupling scheme for quadrature signal generation ensures low phase noise operation. The advantage of proposed differential VCO is analyzed in terms of power consumption, phase noise, and figure of merit. The QVCO has been fabricated with the 0.18-m TSMC CMOS technology for 4.8GHz band operation and the obtained phase noise is -120 dBc/Hz at 1MHz offset frequency while 7mA current consumption and 12.6mW power consumption from 1.8V power supply

Keywords

CMOS integrated circuits; integrated circuit noise; microwave oscillators; phase noise; voltage-controlled oscillators; 0.18 micron; 1.8 V; 12.6 mW; 4.8 GHz; 7 mA; CMOS technology; differential Colpitts configuration; low-phase noise; quadrature Colpitts VCO; quadrature signal generation; super harmonic coupling scheme; voltage controlled oscillator; 1f noise; CMOS technology; Coupling circuits; Energy consumption; Frequency; Integrated circuit noise; Phase noise; Signal generators; Topology; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Design, Automation and Test, 2006 International Symposium on

Conference_Location

Hsinchu

Print_ISBN

1-4244-0179-8

Electronic_ISBN

1-4244-0180-1

Type

conf

DOI

10.1109/VDAT.2006.258185

Filename

4027557