If the amplifier input signal amplitude is too large and the frequency too high, the amplifier is slew-rate limited. This limiting can cause ringing in the time domain and peaking in the frequency domain at the output of the amplifier.

For the A_V = +2 curves, slight peaking occurs. This peaking at high frequency (> 100MHz) is due to a large input signal at a high enough frequency that exceeds the amplifier slew rate. The peaking in the frequency response does not limit the pulse response in the time domain, and the LM7171 is stable with a noise gain of ≥ +2.