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 > App Notes > FILTER CIRCUITS (ANALOG) VIDEO CIRCUITS Keywords: 3-pole, butterworth, active filter, low pass filter, video, output, NTSC, PAL, reconstruction filtering, Dec 04, 2002 operational amplifier, op amp APPLICATION NOTE 1799 5MHz, 3-Pole, Low-Pass Filter plus Video Line Driver for Consumer Video Applications Abstract: The MAX4390 operational amplifier configured in a 3-pole, low-pass Sallen-Key filter that provides a Butterworth response with a bandwidth of -3dB at 5.25MHz. This circuit can be used for video anti-aliasing and reconstruction filtering for composite (CVBS) or S-Video signals in standard definition digital TV (SDTV) applications. The circuit is designed to drive a 75 termination, common in video applications, with an overall gain of 1. The Sall……