一种适用于WiMAX/LTE发射机的高线性、可变带宽、可变增益滤波器设计  

A highly linear,programmable bandwidth,programmable gain filter for WiMAX/LTE transmitter

作　　者：黄继伟[1,2] 王志功[1] 方敏 李正平 

机构地区：[1]东南大学射频与光电集成电路研究所,江苏南京210096 [2]广州润芯信息技术有限公司,广东广州510663

出　　处：《电路与系统学报》2011年第4期30-34,共5页Journal of Circuits and Systems

基　　金：国家高技术研究发展计划"863计划"(2009AA01Z260);广东省科技计划项目(2009A010100004)

摘　　要：采用0.13μm RF CMOS工艺,实现了一个高线性、带宽可变、增益可调的四阶巴特沃兹低通滤波器。此滤波器带宽2.1～12MHz,7种带宽控制,30dB增益范围,1dB增益步进,增益步进误差小于0.05dB,在最大带宽下,输出信号频率1.5MHz,功率4dBm时的三阶谐波失真小于-65dB。芯片面积为0.45mm2。电源电压1.2V,在最大带宽下功耗为12mW,最小带宽下功耗为4mW。此低通滤波器已经成功地应用在WiMAX/LTE直接变频发射机中。This paper describes a highly linear,programmable bandwidth,programmable gain,fourth order Butterworth low pass filter for WiMAX/LTE transmitters with a 0.13μm RF CMOS process.This filter has seven programmable bandwidths which from 2.1MHz to12MHz;30dB programmable gain range with 1dB per step and gain step error less than 0.05dB;the third harmonic distortion less than-65dB at 1.5MHz output signal with 4dBm output power when the filter＇s bandwidth is 12MHz.The circuit area is 0.45mm2.The supply voltage is 1.2V.The circuit consumes 12mW at the largest bandwidth and 4mW at the least bandwidth.The LPF has been successfully applied to direct-conversion WiMAX/LTE transmitters.

关 键 词：WiMAX/LTE 低通滤波器 可变带宽 可变增益 发射机 

分 类 号：TN432[电子电信—微电子学与固体电子学]