Title :
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
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;
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
DOI :
10.1109/ISCAS.1999.780825
