Title :
An inductively-tuned quadrature oscillator with extended frequency control range
Author :
Koo, Raymond C. ; Long, John R.
Author_Institution :
Electron. Res. Lab., Delft Univ. of Technol., Netherlands
Abstract :
A 5 GHz inductively tuned quadrature oscillator designed in a 0.18 μm CMOS technology for high-speed data retiming applications is described. The oscillator is based on a ring architecture with tunable LC delay lines inserted between gain stages to set the operating frequency. The oscillator is tuned by electronically varying magnetic coupling in passive LC delay lines. A 3:1 change in inductance is observed which results in a ±30% frequency control range. This is shown to be more than sufficient to cover typical process, temperature and supply voltage spreads. The oscillator core operates from a 1.8 V power supply and dissipates 46.5 mW.
Keywords :
CMOS analogue integrated circuits; MMIC oscillators; circuit simulation; circuit tuning; coupled circuits; delay lines; integrated circuit design; synchronisation; voltage-controlled oscillators; 0.18 micron; 1.8 V; 46.5 mW; 5 GHz; CMOS oscillator; VCO; high-speed data retiming; inductance change; inductively-tuned quadrature oscillator; operating frequency control range; oscillator extended frequency control range; passive LC delay line magnetic coupling; process spread; ring architecture; supply voltage spread; temperature spread; timing recovery; tunable LC delay lines; voltage-controlled oscillators; CMOS technology; Couplings; Delay lines; Frequency control; Inductance; Magnetic cores; Power supplies; Ring oscillators; Temperature; Voltage;
Conference_Titel :
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on
Print_ISBN :
0-7803-7761-3
DOI :
10.1109/ISCAS.2003.1205662
