3～10GHz CMOS低功耗UWB频率合成器  

A 3-10GHz CMOS Low Power Frequency Synthesizer for UWB

作　　者：王勇[1] 王春华[1] 郭小蓉[1] 

机构地区：[1]湖南大学计算机与通信学院,长沙410082

出　　处：《微电子学》2010年第5期713-717,共5页Microelectronics

摘　　要：提出一种新的超宽带频率合成器结构。该频率合成器可以产生MB-OFDM UWB系统定义的所有14个UWB子带的中心频率。分析了MB-OFDM UWB频率合成器中的杂散频率,提出一种新的Q值增强滤波网络,以抑制其输出信号中的杂散。ADS仿真表明,在TSMC 0.18μmRF CMOS工艺下,该频率合成器的杂散频率抑制能力超过30dBc;在1.8V电源电压下,电路的电流消耗为65 mA。A novel frequency synthesizer architecture for UWB was proposed,which could generate centre frequencies of 14 sub-bands defined by MB-OFDM UWB system.Spurs in the UWB frequency synthesizer was analyzed,and a modified Q-enhancement circuit was designed to deal with spurs in output signals.ADS simulation based on TSMC＇s 0.18 μm RF CMOS technology showed that the synthesizer could restrain spurs over 30 dBc.Operating at 1.8 V supply voltage,the circuit consumes 65 mA of current.

关 键 词：多带正交频分复用 超宽带 频率合成器 Q值增强电路 杂散信号 CMOS 

分 类 号：TN74[电子电信—电路与系统] TN432