Title :
Design of a wideband and low phase noise LC VCO
Author :
Xu, Shuai ; Wei He ; Shi, Chunqi ; Runxi Zhang ; Ma, Cong ; Lai, Zongsheng
Author_Institution :
Inst. of Microelectron. Circuit & Syst., East China Normal Univ., Shanghai, China
Abstract :
In this paper, a 3.18~4.258GHz wideband and low phase noise LC VCO is proposed. Three binary-weighted switching capacitors are exploited to expand the bandwidth; On-chip LDO is utilized to suppress noise from power supply. Symmetrical noise filtering technique is used to suppress thermal noise from tail current and parasitic resistors of bonding wires. The circuit is implemented with 0.13μm RF CMOS process. The frequency tuning range is from 3.18GHz to 4.258GHz and phase noise is -120dBc/Hz at IMHz offset from 4.258GHz carrier. The Figure of Merit (FOM) is -181dB/Hz and maximum power consumption is 12.5mW.
Keywords :
CMOS integrated circuits; filtering theory; microwave integrated circuits; microwave oscillators; voltage-controlled oscillators; RF CMOS process; binary-weighted switching capacitors; bonding wires; figure of merit; frequency 1 MHz; frequency 3.18 GHz to 4.258 GHz; low phase noise LC VCO; on-chip LDO; parasitic resistors; power 12.5 mW; size 0.13 mum; symmetrical noise filtering technique; tail current; thermal noise suppression; wideband voltage controlled oscillators;
Conference_Titel :
Solid-State and Integrated Circuit Technology (ICSICT), 2010 10th IEEE International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-5797-7
DOI :
10.1109/ICSICT.2010.5667296
