Low-power wide-locking-range injection-locked frequency divider for OFDM UWB systems  

作　　者：尹江伟 李宁 郑仁亮 李巍 任俊彦 

机构地区：[1]State Key Laboratory of ASIC & System,Fudan University [2]Micro/Nano Science and Innovation Platform,Fudan University

出　　处：《Journal of Semiconductors》2009年第5期72-76,共5页半导体学报（英文版）

基　　金：supported by the National Program of the 11th 5-Year-Plan(No.51308020403);the IC Design Program of the Shanghai Science Committee(No.08706200700)

摘　　要：This paper describes a divide-by-two injection-locked frequency divider （ILFD） for frequency synthesizers as used in multiband orthogonal frequency division multiplexing （OFDM） ultra-wideband （UWB） systems. By means of dual-injection technique and other conventional tuning techniques, such as DCCA and varactor tuning, the divider demonstrates a wide locking range while consuming much less power. The chip was fabricated in the Jazz 0.18μm RF CMOS process. The measurement results show that the divider achieves a locking range of 4.85 GHz （6.23 to 11.08 GHz） at an input power of 8 dBm. The core circuit without the test buffer consumes only 3.7 mA from a 1.8 V power supply and has a die area of 0.38×0.28 mm^2. The wide locking range combined with low power consumption makes the ILFD suitable for its application in UWB systems.This paper describes a divide-by-two injection-locked frequency divider （ILFD） for frequency synthesizers as used in multiband orthogonal frequency division multiplexing （OFDM） ultra-wideband （UWB） systems. By means of dual-injection technique and other conventional tuning techniques, such as DCCA and varactor tuning, the divider demonstrates a wide locking range while consuming much less power. The chip was fabricated in the Jazz 0.18μm RF CMOS process. The measurement results show that the divider achieves a locking range of 4.85 GHz （6.23 to 11.08 GHz） at an input power of 8 dBm. The core circuit without the test buffer consumes only 3.7 mA from a 1.8 V power supply and has a die area of 0.38×0.28 mm^2. The wide locking range combined with low power consumption makes the ILFD suitable for its application in UWB systems.

关 键 词：UWB ILFD frequency synthesizer divide-by-two 

分 类 号：TN919.72[电子电信—通信与信息系统]