A 2.4 GHz fully integrated CMOS LC VCO

Author

Shi, Hao ; Zhang, Guoyan ; Wang, Yangyuan

Author_Institution

Inst. of Microelectron., Peking Univ., Beijing, China

Volume

2

fYear

2004

fDate

18-21 Oct. 2004

Firstpage

1329

Abstract

A fully integrated 2.4 GHz CMOS LC VCO is designed and fabricated in 0.35 μm BiCMOS process using PN varactor and planar spiral inductor. Trade offs for LC tank design as well as symmetry design considerations from schematic level to layout are presented. The VCO achieves a measured phase noise of -90 dBc/Hz at 100 KHz offset and -116 dBc/Hz at 2 MHz offset. The measured output frequency is from 2.2045 GHz to 2.4970 GHz, which corresponds to 290 MHz tuning range obtained by only tuning the PN varactor pairs. The VCO core draws 4 mA of current from the 3.3 V supply. The whole measurement is accomplished by using a FR-4 PCB test fixture.

Keywords

BiCMOS integrated circuits; CMOS integrated circuits; UHF oscillators; integrated circuit design; phase noise; voltage-controlled oscillators; 0.35 micron; 2.2045 to 2.4970 GHz; 3.3 V; 4 mA; BiCMOS process; FR-4 PCB test fixture; LC tank design; PN varactor pairs; fully integrated CMOS LC VCO; output frequency; phase noise; planar spiral inductor; symmetry design; tuning range; voltage-controlled oscillators; BiCMOS integrated circuits; CMOS process; Inductors; Noise measurement; Phase measurement; Phase noise; Spirals; Tuning; Varactors; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State and Integrated Circuits Technology, 2004. Proceedings. 7th International Conference on

Print_ISBN

0-7803-8511-X

Type

conf

DOI

10.1109/ICSICT.2004.1436798

Filename

1436798