Title :
A 4-GHz CMOS quadrature VCO with 20% tuning range for UWB system
Author :
Yuan, Haiquan ; Fu, Zhongqian ; Lin, Fujiang ; Cai, Li
Author_Institution :
Dept. of Electron. Sci. & Technol., Univ. of Sci. & Technol. of China, Hefei
Abstract :
In this paper, we demonstrate a wide-tuning range QVCO for UWB system. The QVCO core consumes 7.6 mA at 1.8 V supply and achieves -108.79 dBc/Hz phase noise at 1MHz offset from the 4.056 GHz carrier. The figure of merit is -172.5 dBc/Hz.
Keywords :
CMOS integrated circuits; ultra wideband communication; voltage-controlled oscillators; CMOS quadrature VCO; UWB system; current 7.6 mA; frequency 1 MHz; frequency 4 GHz; frequency 4.056 GHz; voltage 1.8 V; Circuit optimization; Coupling circuits; Frequency; Inductors; Parasitic capacitance; Phase noise; Q factor; Tuning; Varactors; Voltage-controlled oscillators;
Conference_Titel :
Microwave Conference, 2008. APMC 2008. Asia-Pacific
Conference_Location :
Macau
Print_ISBN :
978-1-4244-2641-6
Electronic_ISBN :
978-1-4244-2642-3
DOI :
10.1109/APMC.2008.4958367
