Title :
A dual-band LC VCO using a switched current source for IMT-Advanced and UWB applications
Author :
Hu, Xinrong ; Huang, Fengyi ; Li, Tao ; Tang, Xusheng
Author_Institution :
Nat. Mobile Commun. Res. Lab., Southeast Univ., Nanjing, China
Abstract :
This paper presents a dual-band CMOS LC voltage controlled oscillator (VCO) with a switched current source for 3.4-3.6 GHz IMT-Advanced and 4.2-4.8 GHz UWB applications. To accomplish dual-band operation, reconfigurable LC tank is adopted, and a switched current source has been used to guarantee robust start-up condition. Bias filters are used in VCO to suppress reference current noise and dynamic transient effects on the bias line. The simulated phase noises at 1 MHz offset frequency are -124 dBc/Hz at 3.6 GHz and -121 dBc/Hz at 4.8 GHz, respectively. Designed in TSMC 0.13 μm process, the VCO current dissipation is 2.8 mA at UWB band and 3.9 mA at IMT-Advanced band from 1.2 V power supply.
Keywords :
3G mobile communication; ultra wideband communication; voltage-controlled oscillators; IMT-advanced application; TSMC process; UWB applications; bias filters; current 3.9 mA; dual band LC VCO; frequency 1 MHz; frequency 3.4 GHz to 3.6 GHz; frequency 4.2 GHz to 4.8 GHz; size 0.13 mum; switched current source; voltage 1.2 V; voltage controlled oscillator; CMOS integrated circuits; Dual band; Phase noise; Switches; Tuning; Voltage-controlled oscillators;
Conference_Titel :
Signals Systems and Electronics (ISSSE), 2010 International Symposium on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-6352-7
DOI :
10.1109/ISSSE.2010.5607120
