Patent ID: 7423482

Claim:
A circuit configuration having a circuit input for an input signal (Vin) to be amplified and a circuit output to output the amplified input signal as an output signal (Vout), the circuit configuration comprising an operational amplifier (AMP), whose amplifier input is impinged by the input signal (Vin) to be amplified and at whose amplifier output the amplified input signal (Vout) is provided, the operational amplifier (AMP) being fed back using a feedback network to define the circuit amplification, characterized in that the feedback network comprises multiple impedances (R 1 , . . . RN; R 1 b , . . . RNb), which are each selectively connectable and disconnectable via a switching transistor controlled by a digitally generated switching signal, to change the circuit amplification (A) in accordance to the digital states of the switching signals, an integration element (INT 1 -INTN) for smoothing the switching signal being connected upstream from the control inputs of each of the transistors.