Patent ID: 7414467

Claim:
A circuit configuration having a circuit input (inp, inn) for an input signal to be amplified and a circuit output (outn, outp) for outputting the amplified input signal as an output signal, the circuit configuration having a operational amplifier (AMP) implemented as fully-differential, having a noninverting amplifier input (x 1 ), an inverting amplifier input (x 2 ), a positive amplifier output (y 1 ) and a negative amplifier output (y 2 ), the circuit input (inp, inn) being connected via coupling paths to the amplifier inputs (x 1 , x 2 ) and the amplifier outputs (y 1 , y 2 ) being connected via decoupling paths to the circuit output (outp, outn) and via feedback paths to the amplifier inputs (x 2 , x 1 ), characterized by a combination made of a coupling resistor (R 1 b ) and a level shifter (I 1 b , Nsfb) connecting the positive amplifier output (y 1 ) to the inverting amplifier input (x 2 ) and a combination made of a coupling resistor (R 1 a ) and a level shifter (I 1 a , Nsfa) connecting the negative amplifier output (y 2 ) to the noninverting amplifier input (x 1 ).