Patent ID: 8686793

Claim:
Amplifier device, capable to receive at an input an input signal and to provide at least one output amplified signal to a load connected to at least one output terminal of the device, the device comprising at least one amplifier electronic block, having a transfer function A 1 between at least one input and at least one output, said at least one output of said at least one amplifier electronic block being connected to said at least one output terminal of the device, at least one input of said at least one amplifier electronic block being connected to an output of a respective adder adding two input signals, a first input of the adder being connected to an output of a respective support electronic block, having a transfer function N 1 between an input and the output, an input of the support electronic being connected to the input of the device, a second input of the adder being connected to an output of a respective error amplifier, the error amplifier having a non-inverting input and an inverting input and having a transfer function A 3 between a difference of signals present at the non-inverting and inverting inputs and the output, a first input of the error amplifier selected from the non-inverting and inverting inputs being connected to an output of a respective attenuator electronic block, having a transfer function N 2 between an input and the output, the input of the attenuator electronic block being connected to at least one output of said at least one amplifier electronic block, wherein the device further comprises a balancing electronic block, having a transfer function A 2 between an input, that is connected to the input of the device, and an output, a second input of the error amplifier selected from the non-inverting and inverting inputs being connected to the output of the balancing electronic block, the transfer function A 2 being equal to the product A 1 N 1 N 2 , with the second input of the error amplifier that is different from the first one.