Title :
A low power, fast-switching frequency synthesizer of 5.2GHz WLANs
Author :
Cheng, Kuo-Hua ; Chen, Cheng-Hung ; Jou, Christina F.
Author_Institution :
Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
A 1.5V supply, low power consumption and fast switching integer-N frequency synthesizer is presented. The synthesizer consists of LC-tank VCO with quadrature output, D-type flip-flop (DFF) prescalar swallow-counter, phase-frequency detector, charge pump and 4th order loop filter. A noble design procedure for loop filter is also presented with the aid of MATLAB program. The phase noise of VCO is -106dBc/Hz @1MHz offset. Total power consumption of synthesizer is 20.5mW. Settling time is 40μs. The synthesizer is fabricated by TSMC 0.25μm CMOS technology and is suitable for HiperLAN n and IEEE 802.11a lower side-band applications.
Keywords :
CMOS integrated circuits; IEEE standards; MMIC; flip-flops; frequency synthesizers; low-power electronics; voltage-controlled oscillators; wireless LAN; 0.25 micron; 1.5 V; 20.5 mW; 40 mus; 5.2 GHz; CMOS technology; D-type flip-flop; HiperLAN; IEEE 802.11a; LC-tank VCO; MATLAB program; charge pump; integer-N frequency synthesizer; loop filter; low power consumption; low power frequency synthesizer; lower side-band applications; phase noise; phase-frequency detector; prescalar swallow-counter; wireless LAN; CMOS technology; Charge pumps; Energy consumption; Filters; Flip-flops; Frequency synthesizers; Phase detection; Phase frequency detector; Power supplies; Voltage-controlled oscillators;
Conference_Titel :
Solid-State and Integrated Circuits Technology, 2004. Proceedings. 7th International Conference on
Print_ISBN :
0-7803-8511-X
DOI :
10.1109/ICSICT.2004.1436888
