1．二阶低通滤波器的安装与测试 ①参照图4电路安装二阶低通滤波器。元件值取：R1 = R2 = R = 1.6k，R3 = 82k， R4 = 48k ，C1 = C2 = C =0.1F，计算截止频率fc、通带电压放大倍数Auo和Q的值。② 取Ui = 2V，由低到高改变输入信号...
* 4.二阶带阻滤波器的安装与测试 ①参照图12电路安装二阶带通滤波器。元件值取:R1 = R2 =R = 3k,R3 = 0.5R = 1.5k,R4 = 20k,R5 = 10k,C1 = C2 = C = 0.1F, C3 = 2C = 0.2F,计算截止频率fc、通带电压放大倍数Auo和Q的值。