一种用于UWB接收端的带通滤波器分析与设计  

Analysis and design of a band-pass filter for UWB receiver

作　　者：王斌[1] 吴伟仁[1] 曲毓萱 陈志发 

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国兵器工业新技术推广研究所,北京100089 [3]香港应用科技研究院有限公司,香港999077

出　　处：《中南大学学报（自然科学版）》2012年第2期554-560,共7页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(60970137);国家重大专项(2008ZX03006-001;2009ZX03006-006);中国科学院知识创新工程项目(KGCX2-YW-120)

摘　　要：采用0.18μm工艺设计1个用于UWB接收端的4阶切比雪夫有源RC带通滤波器。给出1种有损积分器直流增益补偿策略,从而减小滤波器对运算放大器直流增益的要求。同时,采用1种数控电阻的方式实现通带增益的调节。仿真结果表明:所设计的滤波器在通带增益为0 dB时,通带纹波增益为0.112 dB,下3 dB频率为156 kHz,上3 dB频率为259 MHz,带宽为258.844 MHz;频率为500 MHz处的信号衰减为28.25 dB,频率为792 MHz处的信号衰减为45.16 dB,完全符合UWB接收端对带通滤波器的性能指标要求。A forth-order Chebyshev active RC band-pass filter was designed in 0.18 μm process for ultra-wide band（UWB） receiver.A DC-Gain compensation scheme for lossy integrator was presented to relax the requirement for the DC gain of the op-amp.Meanwhile,a pass-band gain tuning structure was implemented by adopting digital controlled resistor tank.The results show that when the pass-band gain of the filter is tuned to 0 dB,ripples of filter is 0.112 dB,lower -3 dB frequency is 156 kHz,upper -3 dB frequency is 259 MHz,bandwidth is 258.844 MHz,attenuation is 28.25 dB at 500 MHz and is 45.16 dB at 792 MHz.All these results meet the specifications of the band-pass filter for UWB receiver completely.

关 键 词：超宽带 带通滤波器 通带纹波 

分 类 号：TN432[电子电信—微电子学与固体电子学]