An amplifier includes at least a first transistor which has a first input signal at a first input terminal and has a first output terminal at which a first output amplified signal is present. The first transistor comprises a first parasitic capacitive element which is arranged between the first input and output terminals and through which a first current flows. The stagecomprises a device having a second output terminal with an output signal having a value equal to but of different sign from the first output signal and it comprises at least one element which is arranged between the first input terminal of the first transistor and the second output terminal of the device and which is passed through by a second current having a value equal to but of different sign from the first current.