Title :
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
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;
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
DOI :
10.1109/VDAT.2006.258185
