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电流反馈放大器输出端噪声很大

Other Parts Discussed in Thread: OPA695

你好,

我们使用OPA695作为输出级放大,放大倍数约为4.5, 用示波器测量的时候, 输出端噪声的Vpp有100~200mV, 输入为0mV. 请问怎么改进?

输出信号的要求: -2.2V ~ +2.2V, 频率为DC~120MHz, 增益平坦度要求在0.2dB以内. 谢谢!

下图为测量结果:

下图为原理图(电源为+-5V):

谢谢!