Title :
Phase noise in CMOS differential LC oscillators
Author :
Hajimiri, A. ; Lee, T.H.
Author_Institution :
Center for Integrated Syst., Stanford, CA, USA
Abstract :
An analysis of phase noise in differential cross-coupled tuned tank voltage controlled oscillators is presented. The effect of active device noise sources as well as the noise due to the passive elements are taken into account. The predictions are in good agreement with the measurements for different tail currents and supply voltages. The effect of the complementary cross-coupled pair is analyzed and verified experimentally. 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 spiral inductors.
Keywords :
CMOS analogue integrated circuits; UHF integrated circuits; UHF oscillators; integrated circuit noise; phase noise; transient response; voltage-controlled oscillators; 1.8 GHz; 6 mW; CMOS differential LC oscillators; active device noise sources; complementary cross-coupled pair; cross-coupled tuned tank VCO; passive element noise; phase noise; spiral inductors; voltage controlled oscillators; Active noise reduction; Capacitors; Current measurement; Current supplies; Inductors; Phase noise; Spirals; Tail; Voltage; Voltage-controlled oscillators;
Conference_Titel :
VLSI Circuits, 1998. Digest of Technical Papers. 1998 Symposium on
Conference_Location :
Honolulu, HI, USA
Print_ISBN :
0-7803-4766-8
DOI :
10.1109/VLSIC.1998.687999
