Abstract: A non-linear direct-current amplifier in particular for linearizing the output characteristic of a measuring transducer, comprising a main amplifier of which the overall gain is determined by means of one or more non-linear operational amplifier elements of which the individual outputs are connected by way of respective summing resistors with the input of the main amplifier, the input of each operational amplifier element being connected with the tapping of a resistive voltage divider connected between the output of the main amplifier and a reference potential source. Depending on the construction and connection of the operational amplifier elements, amplifier characteristics having increasing, decreasing or both types of slopes can be approximated by rectilinear sections.