A spur-reduction frequency synthesizer for WIMAX applications

Author

Liao, De-Wen ; Hung, Chung-Chih

Author_Institution

Dept. of Electr. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan

fYear

2010

fDate

May 30 2010-June 2 2010

Firstpage

2594

Lastpage

2597

Abstract

A spur-reduction frequency synthesizer proposed in 0.18-um CMOS technology is developed for WIMAX applications. It incorporates a random charge pump to randomize the reference spur so as to accomplish a low spur level or a relatively smooth spectrum and a fast lock synthesizer. This frequency synthesizer achieves the phase noise of -124dBc/Hz at 1MHz offset frequency and reference spurs below -70dBc. The spur tones of the frequency synthesizer are greatly in frequency domain and the power consumption is 28mW.

Keywords

WiMax; frequency synthesizers; phase locked loops; voltage-controlled oscillators; CMOS technology; WIMAX application; frequency 1 MHz; lock synthesizer; offset frequency; phase noise; power 28 mW; power consumption; size 0.18 mum; spur reduction frequency synthesizer; Charge pumps; Frequency domain analysis; Frequency synthesizers; Phase frequency detector; Phase noise; Ring oscillators; Tuning; Voltage control; Voltage-controlled oscillators; WiMAX; PLL; Synthesizer; VCO;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (ISCAS), Proceedings of 2010 IEEE International Symposium on

Conference_Location

Paris

Print_ISBN

978-1-4244-5308-5

Electronic_ISBN

978-1-4244-5309-2

Type

conf

DOI

10.1109/ISCAS.2010.5537089

Filename

5537089