Title :
A transmitter CMOS VCO for WCDMA/EDGE
Author :
Andreani, Pietro ; Kozmin, Kirill ; Sandrup, Per ; Mattsson, Thomas
Author_Institution :
ST-Ericsson, Lund, Sweden
Abstract :
A VCO is implemented in an RF 90nm CMOS process and covers the frequency range 2.55-4.08GHz. Drawing 19mA from 1.2V, the phase noise at 20MHz frequency offset from a 3.7GHz carrier is -156dBc/Hz, meeting the phase noise requirement for GSM. A second version of the VCO covers an additional 4.90-5.75GHz range, at the expense of a higher phase noise in the added band. In this way, all WCDMA/EDGE bands can be synthesized by a single VCO.
Keywords :
CMOS integrated circuits; cellular radio; code division multiple access; phase noise; radio transmitters; radiofrequency integrated circuits; voltage-controlled oscillators; EDGE band; GSM; RF CMOS process; WCDMA band; current 19 mA; frequency 2.55 GHz to 4.08 GHz; frequency 20 MHz; frequency 3.7 GHz; frequency 4.90 GHz to 5.75 GHz; phase noise; size 90 nm; transmitter CMOS VCO; voltage 1.2 V; Coils; GSM; Inductors; Multiaccess communication; Phase noise; Spread spectrum communication; Voltage-controlled oscillators;
Conference_Titel :
ESSCIRC, 2010 Proceedings of the
Conference_Location :
Seville
Print_ISBN :
978-1-4244-6662-7
DOI :
10.1109/ESSCIRC.2010.5619854
