Title :
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
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;
Conference_Titel :
Custom Integrated Circuits Conference, 1997., Proceedings of the IEEE 1997
Conference_Location :
Santa Clara, CA
Print_ISBN :
0-7803-3669-0
DOI :
10.1109/CICC.1997.606654
