Title :
A 0.13µm CMOS ΔΣ fractional-N synthesizer for WiMAX application
Author :
Chueh, Tzu-Chan ; Chen, Wei-Hsien ; Huang, Da-Rong
Author_Institution :
Ind. Technol. Res. Inst., SOC Technol. Center, Hsinchu, Taiwan
Abstract :
This paper presents a fully integrated WiMAX frequency synthesizer. This synthesizer operation frequency is from 4.4 GHz 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 0.13 mum 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 :
CMOS analogue integrated circuits; WiMax; frequency dividers; frequency synthesizers; microwave integrated circuits; phase noise; sigma-delta modulation; voltage-controlled oscillators; CMOS DeltaSigma fractional-N synthesizer; LC-VCO; WiMAX; charge pump; current 32 mA; divider; frequency 4.4 GHz to 5.5 GHz; frequency synthesizer; low drop out; phase noise; power 38.4 mW; sigma delta noise shaper; size 0.13 mum; 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 :
Microwave Integrated Circuits Conference, 2009. EuMIC 2009. European
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4749-7
