A fully integrated spiral-LC CMOS VCO set with prescaler for GSM and DCS-1800 systems

Author

Craninckx, Jan ; Steyaert, Michiel ; Miyakawa, Hiroyuki

Author_Institution

ESAT, Katholieke Univ., Leuven, Heverlee, Belgium

fYear

1997

fDate

5-8 May 1997

Firstpage

403

Lastpage

406

Abstract

A set of two VCOs is developed in a 0.4 μm CMOS process, using a fully integrated spiral inductor with symmetrical octagonal shape in the resonance LC-tank. One VCO operates at a 900 MHz center frequency, and the other at 1.8 GHz, both achieving the required phase noise spec and tuning range for the GSM and DCS-1800 system. The phase noise equals -108 dBc/Hz at 100 kHz offset for the 900 MHz version and -113 dBc/Hz at 200 kHz for the 1.8 GHz version. The power consumption is 9 and 11 mW. An eight-modulus prescaler operates together with both VCOs

Keywords

CMOS integrated circuits; UHF integrated circuits; UHF oscillators; cellular radio; circuit tuning; inductors; integrated circuit noise; mixed analogue-digital integrated circuits; phase noise; prescalers; variable-frequency oscillators; voltage-controlled oscillators; 0.4 micron; 1.8 GHz; 11 mW; 9 mW; 900 MHz; DCS-1800 systems; GSM systems; UHF VCOs; eight-modulus prescaler; integrated spiral inductor; integrated spiral-LC CMOS VCO set; phase noise specification; prescaler; resonance LC-tank; symmetrical octagonal shape; tuning range; CMOS process; Frequency; GSM; Inductors; Phase noise; Resonance; Shape; Spirals; Tuning; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Custom Integrated Circuits Conference, 1997., Proceedings of the IEEE 1997

Conference_Location

Santa Clara, CA

Print_ISBN

0-7803-3669-0

Type

conf

DOI

10.1109/CICC.1997.606654

Filename

606654