Patent ID: 7362175

Claim:
A voltage amplifier comprising: a first field effect transistor with a gate, a drain, and a source, an amplifier input terminal being the gate of the first field effect transistor, and an amplifier output terminal being the drain of the first field effect transistor; a first current generator that charges the drain of the first transistor; a second current generator that charges the source of the first transistor, a value of the current output by the second current generator being substantially equal to a value of the current output by the first current generator; a first capacitor with a first terminal connected to the drain of the first transistor and a second terminal connected to a first reference voltage; a second capacitor with a first terminal connected to the source of the first transistor and a second terminal connected to a second reference voltage; and an additional field effect transistor with a gate, a drain, and a source, of a type opposite to a type of the first field effect transistor, the drain of the additional transistor being connected to the drain of the first field effect transistor, the gate of the additional transistor being connected to a voltage that is or is not offset from the voltage applied to the gate of the first field effect transistor, the source of the additional field effect transistor being connected to the first current generator and to a first terminal of an additional capacitor, the second terminal of the additional capacitor being connected to a fixed voltage.