Title :
A 0.13μm CMOS ΔΣ fractional-N synthesizer for WiMAX application
Author :
Chueh, Tzu-Chan ; Chen, Wei-Hsien ; Huang, Da-Rong
Author_Institution :
SOC Technol. Center, Ind. Technol. Res. Inst., Hsinchu, Taiwan
Abstract :
This paper presents a fully integrated WiMAX frequency synthesizer. This synthesizer operation frequency is from 4.4GHz to 5.5 GHz. It is a DeltaSigma fractional-N synthesizer. It consist of an on-chip low drop out (LDO) regulated LC-VCO, a sigma delta noise shaper, a divider, and a high linearity charge pump. This synthesizer has been implemented in 0.1 3mum CMOS technology and occupied 1.2 mm2 area. It draws 32 mA and consumes 38.4 mW from a 1.2 V supply. The measured out-band phase noise at 1 MHz offset is -117 dBc/Hz. The integrated phase noise is less than 1.25deg.
Keywords :
WiMax; frequency synthesizers; sigma-delta modulation; CMOS fractional-N synthesizer; WiMAX application; current 32 mA; divider; frequency 4.4 GHz to 5.5 GHz; frequency synthesizer; high linearity charge pump; on-chip low drop out; power 38.4 mW; sigma delta noise shaper; voltage 1.2 V; CMOS technology; Charge pumps; Delta-sigma modulation; Frequency synthesizers; Linearity; Noise measurement; Noise shaping; Phase measurement; Phase noise; WiMAX;
Conference_Titel :
Wireless Technology Conference, 2009. EuWIT 2009. European
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4721-3
