Title :
A 4-GHz VCO for Multiband OFDM UWB systems
Author :
Chan, Chi Fat ; Tang, Siu-Kei ; Pun, Kong-Pang
Author_Institution :
Dept. of Electron. Eng., Chinese Univ. of Hong Kong, Hong Kong
Abstract :
A 4-GHz VCO for Multiband OFDM ultra-wide-band system is presented. Methods for maintaining a good phase noise under reasonable power consumption for the 4 GHz VCO are presented. The design was fabricated in 0.18-mum CMOS process. The measured VCO phase noise at 1 MHz offset from 4 GHz is lower than -126 dBc/Hz at 1.5 V supply voltage and is lower than -120 dBc/Hz even at 1 V supply. The VCO has an output frequency range from 3.1-GHz to 4.1-GHz, and consumes 4.7 mW at 1.5V.
Keywords :
CMOS integrated circuits; OFDM modulation; ultra wideband communication; voltage-controlled oscillators; CMOS process; frequency 1 MHz; frequency 3.1 GHz to 4.1 GHz; multiband OFDM UWB systems; power 4.7 mW; size 0.18 mum; voltage 1 V; voltage 1.5 V; 1f noise; Frequency synthesizers; MOS devices; OFDM; Phase noise; Radio spectrum management; Topology; Varactors; Voltage; Voltage-controlled oscillators;
Conference_Titel :
Electron Devices and Solid-State Circuits, 2008. EDSSC 2008. IEEE International Conference on
Conference_Location :
Hong Kong
Print_ISBN :
978-1-4244-2539-6
Electronic_ISBN :
978-1-4244-2540-2
DOI :
10.1109/EDSSC.2008.4760742
