Title :
A multi-band frequency synthesizer for GSM/DCS/WIMAX/WLAN applications with ripple-free circuit
Author :
Chen, Po-Heng ; Chen, Che-Sheng ; Chou, Mei-Fen ; Wen, Kuei-Ann
Author_Institution :
Dept. of Electron. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
This paper presents a fully integrated multi-band frequency synthesizer implemented in CMOS 0.18um process with ripple-free circuit in a single loop. The synthesizer is designed for GSM/DCS/WIMAX/WLAN (802.11a/b/g) systems applying to IQ phase based transceivers. The proposed synthesizer with ripple-free circuit can reduce the amplitude of control voltage ripple. The synthesizer performs the suppression of 31.4dB in the spectrum of reference-spur and the peak-to-peak jitter with 74% improvement compared to the conventional single loop synthesizer design.
Keywords :
CMOS integrated circuits; WiMax; cellular radio; frequency synthesizers; interference suppression; jitter; transceivers; wireless LAN; CMOS process; DCS; GSM; IQ phase based transceivers; WLAN; WiMax; multiband frequency synthesizer; peak-to-peak jitter; reference spur; ripple free circuit; single loop synthesizer design; size 0.18 mum; spectrum suppression; Frequency synthesizers; GSM; Synthesizers; Voltage control; Voltage-controlled oscillators; WiMAX; Wireless LAN;
Conference_Titel :
Signals and Electronic Systems (ICSES), 2010 International Conference on
Conference_Location :
Gliwice
Print_ISBN :
978-1-4244-5307-8
Electronic_ISBN :
978-83-9047-4-2
