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ths3091

Other Parts Discussed in Thread: THS3091

在做宽带直流放大器末级功放部分采用两片ths3091并联,输出端为50欧电阻到地,放大倍数20Db。当用示波器*1当测量时波形不错,但大概3M左右就开始衰减了(经测试函数信号发生器直接接到示波器3M就会衰减),于是改用*10档,此时幅度不会衰减但是出来波形很差,如下,每个周期内好像都是由很多正弦波组成,这是什么原因啊?该如何解决??