WebThe National Air Filtration Association (NAFA) is a dynamic, non-profit trade association. NAFA members include air filter and component manufacturers, sales and service companies, and HVAC and indoor air quality professionals across the United States and in several foreign countries. WebSep 21, 2016 · Ti经典的滤波器设计软件,基本上包括了所有的常用滤波器电路设计,包括低通、高通、带通、带阻全通等,滤波器类型可以有Bessel、Gaussian、Linear、Chebyshev等,滤波器参数可以根据带宽、增益、Q值等计算出电路的阻容,包括单端和差分都有,非常全。
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http://www.dayanzai.me/filelocator.html WebMay 25, 2012 · 【设计任务】设计一个二阶低通滤波器,截止频率为fo=400Hz,Q=0.7。【设计步骤】启动Filter Wiz Pro 3.0,程序界面如图1所示: 图1 Filter Wiz Pro 3.0的程序界面 单击标有“LP”的按钮,打开设计窗口如图1所示。图2 滤波器设计窗口 在左侧窗口指定参数,如图3示: 图3 设定参数 (在上面的指定中,Apb,Asb... bintang credit card
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