一种射频前端宽带复数滤波器电路的设计  

Design of Wideband Complex Filter for RF Front End

作　　者：潘文光[1] 甘业兵[1] 马成炎[2] 叶甜春[1] 

机构地区：[1]中国科学院微电子研究所,北京100029 [2]杭州中科微电子有限公司,杭州310053

出　　处：《微电子学》2010年第4期591-595,共5页Microelectronics

基　　金：国家高技术研究发展(863)计划基金资助项目(2007AA12Z344)

摘　　要：采用0.18 μm CMOS工艺,设计实现了一款7阶OTA-C复数滤波器电路。该电路适合应用于低中频结构的卫星导航射频前端芯片。滤波器的带宽设计为25 MHz,中心频率为15.4MHz,镜像抑制大于30 dB。设计中,采用基于VCO锁相环结构的片上频率修正电路。滤波器消耗的总电流为4 mA,工作电压1.8 V。A 7th-order OTA-C complex filter for RF front end in low-IF satellite-based wireless navigation receiver was designed based on 0.18 μm CMOS process.The filter had a bandwidth of 25 MHz with center frequency at 15.4 MHz,and an image attenuation over 30 dB.And an on-chip frequency tuning circuit based on VCO phase-locked loop was adopted for the design.The filter dissipates 4 mA of power from a 1.8 V supply.

关 键 词：射频前端 复数滤波器 频率修正电路 宽带滤波器 

分 类 号：TN432[电子电信—微电子学与固体电子学] TN713