Title :
Design issues in CMOS differential LC oscillators
Author :
Hajimiri, Ali ; Lee, Thomas H.
Author_Institution :
California Inst. of Technol., Pasadena, CA, USA
fDate :
5/1/1999 12:00:00 AM
Abstract :
An analysis of phase noise in differential cross-coupled inductance-capacitance (LC) oscillators is presented. The effect of tail current and tank power dissipation on the voltage amplitude is shown. Various noise sources in the complementary cross-coupled pair are identified, and their effect on phase noise is analyzed. The predictions are in good agreement with measurements over a large range of tail currents and supply voltages. A 1.8 GHz LC oscillator with a phase noise of -121 dBc/Hz at 600 kHz is demonstrated, dissipating 6 mW of power using on-chip spiral inductors
Keywords :
CMOS analogue integrated circuits; UHF integrated circuits; UHF oscillators; circuit stability; integrated circuit design; integrated circuit noise; jitter; phase noise; voltage-controlled oscillators; 1.8 GHz; 6 mW; CMOS differential LC oscillators; complementary cross-coupled pair; cross-coupled LC oscillators; design issues; inductance-capacitance oscillators; noise sources; onchip spiral inductors; phase noise; tail current effect; tank power dissipation; voltage amplitude; Circuit noise; Circuit simulation; Current supplies; Frequency; Inductors; Phase noise; Spirals; Tail; Voltage; Voltage-controlled oscillators;
Journal_Title :
Solid-State Circuits, IEEE Journal of
