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求助:运放供电电压问题和运放输出限压问题

Other Parts Discussed in Thread: OPA847

1.我用OPA847做小信号放大,放大后输出电平Vp-p <1V  ,那么我用±5V供电和±2.5V供电在噪声或者带宽方面有没有区别?

2.正常信号输出Vp-p <1V,但是也会有Vp-p =Vcc的无用脉冲信号。我想要输出1.2V限压,把无用脉冲信号给限制住,有没有什么好的方法?我试过用两个肖特基二极管接在运放输出端限压后有限压效果,但是经过限压后的无用脉冲信号后端会有小段振铃。