Title :
A Power-Optimized CMOS Quadrature VCO with Wide-Tuning Range for UWB Receivers
Author :
Zhujin, Zhou ; Ning, Li ; Wei, Li ; Junyan, Ren
Author_Institution :
State Key Lab. of ASIC & Syst., Fudan Univ., Shanghai
Abstract :
This paper presents a power-optimized quadrature VCO with wide-tuning range for UWB receivers. The optimization of power is achieved by both optimum selection of LC tand and the improvement of the conventional VCO. To increase the tuning range, the digital controlled capacitor array is exploited. The circuitry is implemented by the 0.18mum RF/mixed signal process. The proposed VCO achieves phase noise of-125dBc/Hz at 1-MHz offset and 34% tuning range while consuming 3.5mA in 1.6-V supply. Figure-of-merit with tuning range of the proposed VCO is which is the lowest among the recent state-of-the-art low-voltage VCOs
Keywords :
CMOS integrated circuits; mixed analogue-digital integrated circuits; optimisation; receivers; ultra wideband communication; voltage-controlled oscillators; 0.18 micron; 1.6 V; 3.5 mA; CMOS quadrature VCO; RF-mixed signal process; UWB receivers; digital controlled capacitor array; power optimization; wide-tuning range; 1f noise; Circuit optimization; MOS devices; Phase noise; Power dissipation; Signal processing; Tail; Topology; Voltage; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 2007. ISCAS 2007. IEEE International Symposium on
Conference_Location :
New Orleans, LA
Print_ISBN :
1-4244-0920-9
Electronic_ISBN :
1-4244-0921-7
DOI :
10.1109/ISCAS.2007.378557
