5MHz， 3极，低通滤波器，加上消费类视频应用视频线驱动器

摘要：MAX4390的运算放大器配置在3杆，低通Sallen-Key滤波器，它提供了一个的-3dB带宽为5.25MHz巴特沃斯响应。该电路可用于过滤复合（CVBS）或S-视频信号在标准清晰度数字电视（SDTV）应用的视频抗锯齿和重建。该电路设计驱动一个75Ω终接，共同在视频应用的总增益为1。

Maxim>AppNotes>FILTERCIRCUITS(ANALOG)VIDEOCIRCUITSKeywords:3-pole,butterworth,activefilter,lowpassfilter,video,output,NTSC,PAL,reconstructionfiltering,Dec04,2002operationalamplifier,opampAPPLICATIONNOTE17995MHz,3-Pole,Low-PassFilterplusVideoLineDriverforConsumerVideoApplicationsAbstract:TheMAX4390operationalamplifierconfiguredina3-pole,low-passSallen-KeyfilterthatprovidesaButterworthresponsewithabandwidthof-3dBat5.25MHz.Thiscircuitcanbeusedforvideoanti-aliasingandreconstructionfilteringforcomposite(CVBS)orS-VideosignalsinstandarddefinitiondigitalTV(SDTV)applications.Thecircuitisdesignedtodrivea75termination,commoninvideoapplications,withanoverallgainof1.TheSall