Title :
Comparison of VCO Topology for Wideband Multi-Standard Applications
Author :
Zhang, Shumin ; Zaghloul, Mona E. ; Su, Wansheng ; Elkis, Radmil ; Wu, Chun-li
Author_Institution :
Hughes Network Syst., Germantown, MD
Abstract :
In this paper, three popular VCO topologies: cross-coupled, complementary cross-coupled, and differential Colpitts are investigated in terms of their performance for wideband wireless communication applications. Three VCOs, implemented in a standard 0.5 mum CMOS technology, are compared from the prospective of phase noise sensitivity to various noise sources, tuning range limitations, power dissipation, and design area. A new figure of merit (FOM) has been proposed to include tuning range into the overall performance metrics. Based on this metric, the experimental result shows that the differential Colpitts and cross-coupled VCO topologies can achieve the best FOM, wide tuning range (42%), and that they are therefore the best candidates for wide-band applications
Keywords :
CMOS integrated circuits; phase noise; voltage-controlled oscillators; 0.5 micron; CMOS technology; cross-coupled VCO topologies; differential Colpitts oscillator; phase noise sensitivity; voltage controlled oscillator; wideband multistandard applications; wideband wireless communication applications; Application software; Circuit optimization; Circuit topology; MOSFET circuits; Network topology; Phase noise; Tuning; Voltage-controlled oscillators; Wideband; Wireless communication;
Conference_Titel :
Wireless and Microwave Technology Conference, 2006. WAMICON '06. IEEE Annual
Conference_Location :
Clearwater Beach, FL
Print_ISBN :
1-4244-0849-0
Electronic_ISBN :
1-4244-0849-0
DOI :
10.1109/WAMICON.2006.351923
