Hi,

i work on designing a folded cascode amplifier with source follower. I´m student,  it´s my first design and i have problems with the gain & phase of my circuit. The Bode Plot looks normal until 240 MHz...it´s going from 20dB to      -5dB. But from 240MHz on the curve is going up again at a level of around 2dB. My phase is quite unstable.
Can anyone help me what could be reason here?