2-V 900-MHz quadrature coupled LC oscillators with improved amplitude and phase matchings

Author

Lo, Chi-Wa ; Luong, Howard C.

Author_Institution

Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., Kowloon, Hong Kong

Volume

2

fYear

1999

fDate

36342

Firstpage

585

Abstract

Coupled LC oscillators are known to provide good performance in terms of phase noise, signal amplitude, power consumption, and quadrature output signals. However, IQ amplitude and phase mismatches in these oscillators can be quite large due to the serious mismatch problem of large area inductors and varactors. A simple design modification of the coupled LC oscillators shows a significant improvement of the amplitude and phase mismatches. Detailed operational principle is examined. A 2 V 900 MHz prototype using this simple idea has been designed

Keywords

CMOS analogue integrated circuits; UHF integrated circuits; UHF oscillators; coupled circuits; inductors; integrated circuit design; phase noise; varactors; 2 V; 900 MHz; amplitude matching; design modification; large area inductors; phase matching; phase noise; power consumption; quadrature coupled LC oscillators; quadrature output signals; signal amplitude; varactors; CMOS technology; Couplings; Energy consumption; Frequency conversion; Inductors; Phase noise; Power engineering and energy; Prototypes; Varactors; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on

Conference_Location

Orlando, FL

Print_ISBN

0-7803-5471-0

Type

conf

DOI

10.1109/ISCAS.1999.780825

Filename

780825