Phase noise in CMOS differential LC oscillators

Author

Hajimiri, A. ; Lee, T.H.

Author_Institution

Center for Integrated Syst., Stanford, CA, USA

fYear

1998

fDate

11-13 June 1998

Firstpage

48

Lastpage

51

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;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Circuits, 1998. Digest of Technical Papers. 1998 Symposium on

Conference_Location

Honolulu, HI, USA

Print_ISBN

0-7803-4766-8

Type

conf

DOI

10.1109/VLSIC.1998.687999

Filename

687999