An UMTS and GSM Low Phase Noise Inductively Tuned LC VCO

Author

Ruippo, Pekko ; Lehtonen, Tapio A. ; Tchamov, Nikolay T.

Author_Institution

Dept. of Commun. Eng., Tampere Univ. of Technol., Tampere, Finland

Volume

20

Issue

3

fYear

2010

fDate

3/1/2010 12:00:00 AM

Firstpage

163

Lastpage

165

Abstract

A voltage controlled oscillator (VCO) design strategy for extended tuning range with low phase noise at critical GSM and UMTS frequencies is applied and verified by simulations, implementation and measurements on 130 nm CMOS. The oscillator tuning range is expanded from 49.4% to 60.2% by shorting transformer secondary winding with a switch. The VCO achieves a phase noise of -126.1 dBc/Hz (switch ??off??) and -123.4 dBc/Hz (switch ??on??) at a 1 MHz offset from a 4 GHz and 4.8 GHz carrier while consuming less than 7.5 mA from 1.8 V power supply.

Keywords

3G mobile communication; cellular radio; circuit tuning; integrated circuit design; integrated circuit measurement; phase noise; voltage-controlled oscillators; GSM; UMTS; current 7.5 mA; frequency 4 GHz; frequency 4.8 GHz; inductively tuned LC VCO; low phase noise; oscillator tuning range; size 130 nm; voltage 1.8 V; voltage controlled oscillator; CMOS; GSM; UMTS; low Phase Noise; transformer; varactors; voltage controlled oscillator (VCO); wideband;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2010.2040219

Filename

5401044