A 2.4 GHz low-power low-phase-noise CMOS VCO using spiral inductors and junction varactors

Author

Long, Jie ; Weber, Robert J.

Author_Institution

Dept. of Electr. & Comput. Eng., Iowa State Univ., Ames, IA, USA

Volume

4

fYear

2004

fDate

23-26 May 2004

Abstract

A completely integrated 2.4 GHz low-power low-phase-noise voltage-controlled oscillator (VCO) was implemented in a standard 0.18 μm single-poly, 6-metal mixed-signal CMOS process. It employs junction varactors as voltage-controlled capacitances along with on-chip spiral inductors to form the LC-tank. The VCO-core draws 1.8 mA of current from a 1.2 V supply. Simulated phase noise is shown as -101.9 dBc/Hz at a 100 kHz offset from the carrier frequency of 2.4 GHz, and -122.1 dBc/Hz at a 1MHz offset. Comparison shows that this design has better performance than previously published similar results. This circuit is in process of being fabricated through the MOSIS Educational Program.

Keywords

CMOS analogue integrated circuits; UHF integrated circuits; UHF oscillators; circuit tuning; inductors; integrated circuit layout; integrated circuit noise; mixed analogue-digital integrated circuits; phase noise; varactors; voltage-controlled oscillators; 0.18 micron; 1.2 V; 1.8 mA; 2.4 GHz; LC-tank; MOSIS educational program; VCO core; integrated low-power low-phase-noise voltage-controlled oscillator; junction varactors; low-power low-phase-noise CMOS VCO; mixed-signal CMOS process; on-chip spiral inductors; simulated phase noise; voltage-controlled capacitances; CMOS process; Capacitance; Circuit simulation; Frequency; Inductors; Phase noise; Spirals; Varactors; Voltage; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on

Print_ISBN

0-7803-8251-X

Type

conf

DOI

10.1109/ISCAS.2004.1329061

Filename

1329061